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Castro N, Vilela B, Mata-Sucre Y, Marques A, Gagnon E, Lewis GP, Costa L, Souza G. Repeatome evolution across space and time: Unravelling repeats dynamics in the plant genus Erythrostemon Klotzsch (Leguminosae Juss). Mol Ecol 2024:e17510. [PMID: 39248108 DOI: 10.1111/mec.17510] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/08/2024] [Revised: 07/17/2024] [Accepted: 07/22/2024] [Indexed: 09/10/2024]
Abstract
Fluctuations in genomic repetitive fractions (repeatome) are known to impact several facets of evolution, such as ecological adaptation and speciation processes. Therefore, investigating the divergence of repetitive elements can provide insights into an important evolutionary force. However, it is not clear how the different repetitive element clades are impacted by the different factors such as ecological changes and/or phylogeny. To discuss this, we used the Neotropical legume genus Erythrostemon (Caesalpinioideae) as a model, given its ancient origin (~33 Mya), lineage-specific niche conservatism, macroecological heterogeneity, and disjunct distribution in Meso- and South American (MA and SA respectively) lineages. We performed a comparative repeatomic analysis of 18 Erythrostemon species to test the impact of environmental variables over repeats diversification. Overall, repeatome composition was diverse, with high abundances of satDNAs and Ty3/gypsy-Tekay transposable elements, predominantly in the MA and SA lineages respectively. However, unexpected repeatome profiles unrelated to the phylogeny/biogeography were found in a few MA (E. coccineus, E. pannosus and E. placidus) and SA (E. calycinus) species, related to reticulate evolution and incongruence between nuclear and plastid topology, suggesting ancient hybridizations. The plesiomorphic Tekay and satDNA pattern was altered in the MA-sensu stricto subclade with a striking genomic differentiation (expansion of satDNA and retraction of Tekay) associated with the colonization of a new environment in Central America around 20 Mya. Our data reveal that the current species-specific Tekay pool was the result of two bursts of amplification probably in the Miocene, with distinct patterns for the MA and SA repeatomes. This suggests a strong role of the Tekay elements as modulators of the genome-environment interaction in Erythrostemon, providing macroevolutionary insights about mechanisms of repeatome differentiation and plant diversification across space and time.
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Affiliation(s)
- Natália Castro
- Laboratory of Plant Cytogenetics and Evolution, Department of Botany, Biosciences Center, Federal University of Pernambuco, Recife, Brazil
| | - Bruno Vilela
- Institute of Biology, Federal University of Bahia, Salvador, Bahia, Brazil
| | - Yennifer Mata-Sucre
- Laboratory of Plant Cytogenetics and Evolution, Department of Botany, Biosciences Center, Federal University of Pernambuco, Recife, Brazil
| | - André Marques
- Department of Chromosome Biology, Max Planck Institute for Plant Breeding Research, Cologne, Germany
| | - Edeline Gagnon
- Department of Integrative Biology, University of Guelph, Guelph, Ontario, Canada
| | - Gwilym P Lewis
- Accelerated Taxonomy Department, Royal Botanic Gardens, Kew, Richmond, UK
| | - Lucas Costa
- Laboratory of Plant Cytogenetics and Evolution, Department of Botany, Biosciences Center, Federal University of Pernambuco, Recife, Brazil
| | - Gustavo Souza
- Laboratory of Plant Cytogenetics and Evolution, Department of Botany, Biosciences Center, Federal University of Pernambuco, Recife, Brazil
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2
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Hrabovský M, Kubalová S, Mičieta K, Ščevková J. Environmental impacts on intraspecific variation in Ambrosia artemisiifolia genome size in Slovakia, Central Europe. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2024; 31:33960-33974. [PMID: 38693457 PMCID: PMC11136817 DOI: 10.1007/s11356-024-33410-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/08/2023] [Accepted: 04/16/2024] [Indexed: 05/03/2024]
Abstract
The quantity of DNA in angiosperms exhibits variation attributed to many external influences, such as environmental factors, geographical features, or stress factors, which exert constant selection pressure on organisms. Since invasive species possess adaptive capabilities to acclimate to novel environmental conditions, ragweed (Ambrosia artemisiifolia L.) was chosen as a subject for investigating their influence on genome size variation. Slovakia has diverse climatic conditions, suitable for testing the hypothesis that air temperature and precipitation, the main limiting factors of ragweed occurrence, would also have an impact on its genome size. Our results using flow cytometry confirmed this hypothesis and also found a significant association with geographical features such as latitude, altitude, and longitude. We can conclude that plants growing in colder environments farther from oceanic influences exhibit smaller DNA amounts, while optimal growth conditions result in a greater variability in genome size, reflecting the diminished effect of selection pressure.
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Affiliation(s)
- Michal Hrabovský
- Department of Botany, Faculty of Natural Sciences, Comenius University, Révová 39, 811 02, Bratislava, Slovakia.
| | - Silvia Kubalová
- Department of Botany, Faculty of Natural Sciences, Comenius University, Révová 39, 811 02, Bratislava, Slovakia
| | - Karol Mičieta
- Department of Botany, Faculty of Natural Sciences, Comenius University, Révová 39, 811 02, Bratislava, Slovakia
| | - Jana Ščevková
- Department of Botany, Faculty of Natural Sciences, Comenius University, Révová 39, 811 02, Bratislava, Slovakia
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3
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Herrick J. DNA Damage, Genome Stability, and Adaptation: A Question of Chance or Necessity? Genes (Basel) 2024; 15:520. [PMID: 38674454 PMCID: PMC11049855 DOI: 10.3390/genes15040520] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/17/2024] [Revised: 04/14/2024] [Accepted: 04/18/2024] [Indexed: 04/28/2024] Open
Abstract
DNA damage causes the mutations that are the principal source of genetic variation. DNA damage detection and repair mechanisms therefore play a determining role in generating the genetic diversity on which natural selection acts. Speciation, it is commonly assumed, occurs at a rate set by the level of standing allelic diversity in a population. The process of speciation is driven by a combination of two evolutionary forces: genetic drift and ecological selection. Genetic drift takes place under the conditions of relaxed selection, and results in a balance between the rates of mutation and the rates of genetic substitution. These two processes, drift and selection, are necessarily mediated by a variety of mechanisms guaranteeing genome stability in any given species. One of the outstanding questions in evolutionary biology concerns the origin of the widely varying phylogenetic distribution of biodiversity across the Tree of Life and how the forces of drift and selection contribute to shaping that distribution. The following examines some of the molecular mechanisms underlying genome stability and the adaptive radiations that are associated with biodiversity and the widely varying species richness and evenness in the different eukaryotic lineages.
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Affiliation(s)
- John Herrick
- Independent Researcher at 3, Rue des Jeûneurs, 75002 Paris, France
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4
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Imran A, Ghosh A. Evolutionary expansion, functional diversification, and transcript profiling of plant Glutathione Peroxidases. PLANT SCIENCE : AN INTERNATIONAL JOURNAL OF EXPERIMENTAL PLANT BIOLOGY 2024; 341:111991. [PMID: 38266716 DOI: 10.1016/j.plantsci.2024.111991] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/28/2023] [Revised: 12/11/2023] [Accepted: 01/12/2024] [Indexed: 01/26/2024]
Abstract
Glutathione peroxidases (GPXs) play a crucial role in combating activated oxygen species and have been widely studied for their involvement in stress responses. In addition to their stress-related functions, GPXs exhibit diverse roles such as immunological response, and involvement in growth and development. These enzymes are found in both animals and plants, with multiple families identified in the evolutionarily diverse species. These families consist of conserved genes as well as unique members, highlighting the evolutionary diversification of GPX members. While animals have eight GPX families, plants possess five families. Notably, plant genomes undergo duplication and expansion events, leading to an increase in the number of GPX genes and the overall size of the GPX superfamily. This expansion suggests a wide range of functional roles for GPX. In this study, the evolutionary diversification, family expansion, and diverse functional roles of GPX enzymes have been investigated. Additionally, the expression profile of Arabidopsis and Oryza sativa GPX genes were analyzed in different developmental stages, tissues, and abiotic stress conditions. Further extensive research has been required to unravel the intricate interplay between GPX and other proteins, to gain the comprehensive mechanism governing the physiological and developmental roles of GPX.
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Affiliation(s)
- Al Imran
- Department of Biochemistry and Molecular Biology, Shahjalal University of Science and Technology, Sylhet 3114, Bangladesh
| | - Ajit Ghosh
- Department of Biochemistry and Molecular Biology, Shahjalal University of Science and Technology, Sylhet 3114, Bangladesh.
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5
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Guenzi-Tiberi P, Istace B, Alsos IG, Coissac E, Lavergne S, Aury JM, Denoeud F. LocoGSE, a sequence-based genome size estimator for plants. FRONTIERS IN PLANT SCIENCE 2024; 15:1328966. [PMID: 38550287 PMCID: PMC10972871 DOI: 10.3389/fpls.2024.1328966] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 10/27/2023] [Accepted: 02/22/2024] [Indexed: 06/21/2024]
Abstract
Extensive research has focused on exploring the range of genome sizes in eukaryotes, with a particular emphasis on land plants, where significant variability has been observed. Accurate estimation of genome size is essential for various research purposes, but existing sequence-based methods have limitations, particularly for low-coverage datasets. In this study, we introduce LocoGSE, a novel genome size estimator designed specifically for low-coverage datasets generated by genome skimming approaches. LocoGSE relies on mapping the reads on single copy consensus proteins without the need for a reference genome assembly. We calibrated LocoGSE using 430 low-coverage Angiosperm genome skimming datasets and compared its performance against other estimators. Our results demonstrate that LocoGSE accurately predicts monoploid genome size even at very low depth of coverage (<1X) and on highly heterozygous samples. Additionally, LocoGSE provides stable estimates across individuals with varying ploidy levels. LocoGSE fills a gap in sequence-based plant genome size estimation by offering a user-friendly and reliable tool that does not rely on high coverage or reference assemblies. We anticipate that LocoGSE will facilitate plant genome size analysis and contribute to evolutionary and ecological studies in the field. Furthermore, at the cost of an initial calibration, LocoGSE can be used in other lineages.
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Affiliation(s)
- Pierre Guenzi-Tiberi
- Génomique Métabolique, Genoscope, Institut François Jacob, CEA, CNRS, Univ Evry, Université Paris-Saclay, Evry, France
| | - Benjamin Istace
- Génomique Métabolique, Genoscope, Institut François Jacob, CEA, CNRS, Univ Evry, Université Paris-Saclay, Evry, France
| | - Inger Greve Alsos
- The Arctic University Museum of Norway, UiT The Arctic University of Norway, Tromsø, Norway
| | - Eric Coissac
- Univ. Grenoble Alpes, Univ. Savoie Mont Blanc, CNRS, LECA (Laboratoire d’Ecologie Alpine), Grenoble, France
| | - Sébastien Lavergne
- Univ. Grenoble Alpes, Univ. Savoie Mont Blanc, CNRS, LECA (Laboratoire d’Ecologie Alpine), Grenoble, France
| | - Jean-Marc Aury
- Génomique Métabolique, Genoscope, Institut François Jacob, CEA, CNRS, Univ Evry, Université Paris-Saclay, Evry, France
| | - France Denoeud
- Génomique Métabolique, Genoscope, Institut François Jacob, CEA, CNRS, Univ Evry, Université Paris-Saclay, Evry, France
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6
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Fourreau CJL, Kise H, Santander MD, Pirro S, Maronna MM, Poliseno A, Santos ME, Reimer JD. Genome sizes and repeatome evolution in zoantharians (Cnidaria: Hexacorallia: Zoantharia). PeerJ 2023; 11:e16188. [PMID: 37868064 PMCID: PMC10586311 DOI: 10.7717/peerj.16188] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/08/2023] [Accepted: 09/06/2023] [Indexed: 10/24/2023] Open
Abstract
Across eukaryotes, large variations of genome sizes have been observed even between closely related species. Transposable elements as part of the repeated DNA have been proposed and confirmed as one of the most important contributors to genome size variation. However, the evolutionary implications of genome size variation and transposable element dynamics are not well understood. Together with phenotypic traits, they are commonly referred to as the "C-value enigma". The order Zoantharia are benthic cnidarians found from intertidal zones to the deep sea, and some species are particularly abundant in coral reefs. Despite their high ecological relevance, zoantharians have yet to be largely studied from the genomic point of view. This study aims at investigating the role of the repeatome (total content of repeated elements) in genome size variations across the order Zoantharia. To this end, whole-genomes of 32 zoantharian species representing five families were sequenced. Genome sizes were estimated and the abundances of different repeat classes were assessed. In addition, the repeat overlap between species was assessed by a sequence clustering method. The genome sizes in the dataset varied up to 2.4 fold magnitude. Significant correlations between genome size, repeated DNA content and transposable elements, respectively (Pearson's correlation test R2 = 0.47, p = 0.0016; R2 = 0.22, p = 0.05) were found, suggesting their involvement in the dynamics of genome expansion and reduction. In all species, long interspersed nuclear elements and DNA transposons were the most abundant identified elements. These transposable elements also appeared to have had a recent expansion event. This was in contrast to the comparative clustering analysis which revealed species-specific patterns of satellite elements' amplification. In summary, the genome sizes of zoantharians likely result from the complex dynamics of repeated elements. Finally, the majority of repeated elements (up to 70%) could not be annotated to a known repeat class, highlighting the need to further investigate non-model cnidarian genomes. More research is needed to understand how repeated DNA dynamics relate to zoantharian evolution and their biology.
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Affiliation(s)
- Chloé Julie Loïs Fourreau
- Molecular Invertebrate Systematics and Ecology (MISE) Lab, Graduate School of Engineering and Science, University of the Ryukyus, Nishihara, Okinawa, Japan
| | - Hiroki Kise
- Molecular Invertebrate Systematics and Ecology (MISE) Lab, Graduate School of Engineering and Science, University of the Ryukyus, Nishihara, Okinawa, Japan
- AIST Tsukuba Central, Geological Survey of Japan, National Institute of Advanced Industrial Science and Technology, Tsukuba, Ibaraki, Japan
| | - Mylena Daiana Santander
- Departamento de Genética e Biologia Evolutiva, Instituto de Biociências, Universidade de São Paulo, São Paulo, Brazil
| | - Stacy Pirro
- Iridian Genomes, Bethesda, United States of America
| | - Maximiliano M. Maronna
- Molecular Invertebrate Systematics and Ecology (MISE) Lab, Graduate School of Engineering and Science, University of the Ryukyus, Nishihara, Okinawa, Japan
- Faculdade de Ciências, Universidade Estadual Paulista (UNESP), Bauru, Brazil
| | - Angelo Poliseno
- Molecular Invertebrate Systematics and Ecology (MISE) Lab, Graduate School of Engineering and Science, University of the Ryukyus, Nishihara, Okinawa, Japan
| | - Maria E.A. Santos
- Molecular Invertebrate Systematics and Ecology (MISE) Lab, Graduate School of Engineering and Science, University of the Ryukyus, Nishihara, Okinawa, Japan
- Okinawa Institute of Science and Technology, Onna, Okinawa, Japan
| | - James Davis Reimer
- Molecular Invertebrate Systematics and Ecology (MISE) Lab, Graduate School of Engineering and Science, University of the Ryukyus, Nishihara, Okinawa, Japan
- Tropical Biosphere Research Center, University of the Ryukyus, Nishihara, Okinawa, United States of America
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7
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Leung W, Torosin N, Cao W, Reed LK, Arrigo C, Elgin SCR, Ellison CE. Long-read genome assemblies for the study of chromosome expansion: Drosophila kikkawai, Drosophila takahashii, Drosophila bipectinata, and Drosophila ananassae. G3 (BETHESDA, MD.) 2023; 13:jkad191. [PMID: 37611223 PMCID: PMC10542312 DOI: 10.1093/g3journal/jkad191] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/23/2023] [Revised: 08/01/2023] [Accepted: 08/04/2023] [Indexed: 08/25/2023]
Abstract
Flow cytometry estimates of genome sizes among species of Drosophila show a 3-fold variation, ranging from ∼127 Mb in Drosophila mercatorum to ∼400 Mb in Drosophila cyrtoloma. However, the assembled portion of the Muller F element (orthologous to the fourth chromosome in Drosophila melanogaster) shows a nearly 14-fold variation in size, ranging from ∼1.3 Mb to >18 Mb. Here, we present chromosome-level long-read genome assemblies for 4 Drosophila species with expanded F elements ranging in size from 2.3 to 20.5 Mb. Each Muller element is present as a single scaffold in each assembly. These assemblies will enable new insights into the evolutionary causes and consequences of chromosome size expansion.
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Affiliation(s)
- Wilson Leung
- Department of Biology, Washington University in St. Louis, St. Louis, MO 63130, USA
| | - Nicole Torosin
- Department of Genetics and Human Genetics Institute of New Jersey, Rutgers University, Piscataway, NJ 08854, USA
| | - Weihuan Cao
- Department of Genetics and Human Genetics Institute of New Jersey, Rutgers University, Piscataway, NJ 08854, USA
| | - Laura K Reed
- Department of Biological Sciences, The University of Alabama, Tuscaloosa, AL 35487, USA
| | - Cindy Arrigo
- Department of Biology, New Jersey City University, Jersey City, NJ 07305, USA
| | - Sarah C R Elgin
- Department of Biology, Washington University in St. Louis, St. Louis, MO 63130, USA
| | - Christopher E Ellison
- Department of Genetics and Human Genetics Institute of New Jersey, Rutgers University, Piscataway, NJ 08854, USA
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8
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Pyšek P, Lučanová M, Dawson W, Essl F, Kreft H, Leitch IJ, Lenzner B, Meyerson LA, Pergl J, van Kleunen M, Weigelt P, Winter M, Guo WY. Small genome size and variation in ploidy levels support the naturalization of vascular plants but constrain their invasive spread. THE NEW PHYTOLOGIST 2023; 239:2389-2403. [PMID: 37438886 DOI: 10.1111/nph.19135] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/08/2022] [Accepted: 06/17/2023] [Indexed: 07/14/2023]
Abstract
Karyological characteristics are among the traits underpinning the invasion success of vascular plants. Using 11 049 species, we tested the effects of genome size and ploidy levels on plant naturalization (species forming self-sustaining populations where they are not native) and invasion (naturalized species spreading rapidly and having environmental impact). The probability that a species naturalized anywhere in the world decreased with increasing monoploid genome size (DNA content of a single chromosome set). Naturalized or invasive species with intermediate monoploid genomes were reported from many regions, but those with either small or large genomes occurred in fewer regions. By contrast, large holoploid genome sizes (DNA content of the unreplicated gametic nucleus) constrained naturalization but favoured invasion. We suggest that a small genome is an advantage during naturalization, being linked to traits favouring adaptation to local conditions, but for invasive spread, traits associated with a large holoploid genome, where the impact of polyploidy may act, facilitate long-distance dispersal and competition with other species.
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Affiliation(s)
- Petr Pyšek
- Department of Invasion Ecology, Institute of Botany, Czech Academy of Sciences, Průhonice, CZ-252 43, Czech Republic
- Department of Ecology, Faculty of Science, Charles University, Viničná 7, Prague, CZ-128 44, Czech Republic
| | - Magdalena Lučanová
- Department of Evolutionary Biology of Plants, Institute of Botany, Czech Academy of Sciences, Průhonice, CZ-252 43, Czech Republic
- Department of Botany, Faculty of Science, University of South Bohemia, Branišovská 1760, České Budějovice, CZ-370 05, Czech Republic
| | - Wayne Dawson
- Department of Biosciences, Durham University, South Road, Durham, DH1 3LE, UK
| | - Franz Essl
- Division of Bioinvasions, Global Change & Macroecology, Department of Botany and Biodiversity Research, University of Vienna, Wien, 1030, Austria
| | - Holger Kreft
- Biodiversity, Macroecology & Biogeography, University of Göttingen, Büsgenweg 1, Göttingen, 37077, Germany
- Centre of Biodiversity and Sustainable Land Use (CBL), University of Goettingen, Büsgenweg 1, Göttingen, D-37077, Germany
- Campus-Institute Data Science, Goldschmidtstraße 1, Göttingen, 37077, Germany
| | - Ilia J Leitch
- Royal Botanic Gardens, Kew, Richmond, Surrey, TW9 3AE, UK
| | - Bernd Lenzner
- Division of Bioinvasions, Global Change & Macroecology, Department of Botany and Biodiversity Research, University of Vienna, Wien, 1030, Austria
| | - Laura A Meyerson
- University of Rhode Island, Natural Resources Science, 9 East Alumni Avenue, Kingston, 02881, RI, USA
| | - Jan Pergl
- Department of Invasion Ecology, Institute of Botany, Czech Academy of Sciences, Průhonice, CZ-252 43, Czech Republic
| | - Mark van Kleunen
- Ecology, Department of Biology, University of Konstanz, Universitätsstrasse 10, Constance, D-78464, Germany
- Zhejiang Provincial Key Laboratory of Plant Evolutionary Ecology and Conservation, Taizhou University, Taizhou, 318000, China
| | - Patrick Weigelt
- Biodiversity, Macroecology & Biogeography, University of Göttingen, Büsgenweg 1, Göttingen, 37077, Germany
- Centre of Biodiversity and Sustainable Land Use (CBL), University of Goettingen, Büsgenweg 1, Göttingen, D-37077, Germany
- Campus-Institute Data Science, Goldschmidtstraße 1, Göttingen, 37077, Germany
| | - Marten Winter
- German Centre for Integrative Biodiversity Research (iDiv) Halle-Jena-Leipzig, Puschstraße 4, Leipzig, 04103, Germany
| | - Wen-Yong Guo
- Research Centre for Global Change and Complex Ecosystems, School of Ecological and Environmental Sciences, East China Normal University, Shanghai, 200241, China
- Zhejiang Tiantong Forest Ecosystem National Observation and Research Station, School of Ecological and Environmental Sciences, East China Normal University, Shanghai, 200241, China
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9
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Shivappagowda Kruthika H, Srikanta Rukmangada M, Girish Naik V. Genome size, chromosome number variation and its correlation with stomatal characters for assessment of ploidy levels in a core subset of mulberry (Morus spp.) germplasm. Gene 2023:147637. [PMID: 37442306 DOI: 10.1016/j.gene.2023.147637] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/06/2023] [Revised: 06/15/2023] [Accepted: 07/10/2023] [Indexed: 07/15/2023]
Abstract
The large size of the germplasm collection along with scanty information on their cytological and genome constitution have hindered well-planned breeding schemes in mulberry. To address the issue, a study was undertaken to investigate the variability in DNA content and genome size, chromosome number, ploidy and its relation with important stomatal characteristics among 162 mulberry germplasm. These germplasm comprise a core subset of 150 collections along with a representative collection of different mulberry species including the wild. Among the germplasm belonging to 16 species, we identified 122 diploids (2n = 28), 4 aneuploids (2n = 30), 13 triploids (2n = 42), 15 tetraploids (2n = 56), 7 hexaploids (2n = 84) and 1 dodecosaploid (2n = 308) based on the chromosome count. Most of the cultivated mulberries are found to be diploids. The mean nuclear 2C DNA content estimated by Flow cytometry, varied from 0.723±0.006 pg (M. australis, 2n = 2x) to 7.732 pg (M. nigra, 2n = 22x). The 2C DNA content positively correlated with the ploidy status and stomatal length (r = 0.814, p<0.001). Based on the 1Cx value, the study also suggests that the majority of the polyploid species have experienced genome downsizing in relation to their diploid progenitors. This study provides the most essential information on chromosome number, ploidy and DNA content to facilitate the utilization of a core subset of germplasm in the mulberry breeding program.
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Affiliation(s)
- Hampapura Shivappagowda Kruthika
- Molecular Biology Laboratory - 1, Central Sericultural Research and Training Institute, Srirampura, Manandavadi Road, Mysuru - 570 008, India
| | - Martikyathnahalli Srikanta Rukmangada
- Molecular Biology Laboratory - 1, Central Sericultural Research and Training Institute, Srirampura, Manandavadi Road, Mysuru - 570 008, India; Department of Plant Sciences, UC Davis, California, 95616, USA
| | - Vorkady Girish Naik
- Molecular Biology Laboratory - 1, Central Sericultural Research and Training Institute, Srirampura, Manandavadi Road, Mysuru - 570 008, India.
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10
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Leung W, Torosin N, Cao W, Reed LK, Arrigo C, Elgin SCR, Ellison CE. Long-read genome assemblies for the study of chromosome expansion: Drosophila kikkawai , Drosophila takahashii , Drosophila bipectinata , and Drosophila ananassae. BIORXIV : THE PREPRINT SERVER FOR BIOLOGY 2023:2023.05.22.541758. [PMID: 37292993 PMCID: PMC10245892 DOI: 10.1101/2023.05.22.541758] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
Flow cytometry estimates of genome sizes among species of Drosophila show a 3-fold variation, ranging from ∼127 Mb in Drosophila mercatorum to ∼400 Mb in Drosophila cyrtoloma . However, the assembled portion of the Muller F Element (orthologous to the fourth chromosome in Drosophila melanogaster ) shows a nearly 14-fold variation in size, ranging from ∼1.3 Mb to > 18 Mb. Here, we present chromosome-level long read genome assemblies for four Drosophila species with expanded F Elements ranging in size from 2.3 Mb to 20.5 Mb. Each Muller Element is present as a single scaffold in each assembly. These assemblies will enable new insights into the evolutionary causes and consequences of chromosome size expansion.
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Affiliation(s)
- Wilson Leung
- Department of Biology, Washington University in St. Louis, St. Louis, MO 63130, USA
| | - Nicole Torosin
- Department of Genetics and Human Genetics Institute of New Jersey, Rutgers University, Piscataway, NJ 08854, USA
| | - Weihuan Cao
- Department of Genetics and Human Genetics Institute of New Jersey, Rutgers University, Piscataway, NJ 08854, USA
| | - Laura K Reed
- Department of Biological Sciences, The University of Alabama, Tuscaloosa, Alabama, 35487, USA
| | - Cindy Arrigo
- Department of Biology, New Jersey City University, Jersey City, NJ 07305, USA
| | - Sarah C R Elgin
- Department of Biology, Washington University in St. Louis, St. Louis, MO 63130, USA
| | - Christopher E Ellison
- Department of Genetics and Human Genetics Institute of New Jersey, Rutgers University, Piscataway, NJ 08854, USA
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11
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Kushwaha B, Nagpure NS, Srivastava S, Pandey M, Kumar R, Raizada S, Agarwal S, Singh M, Basheer VS, Kumar RG, Das P, Das SP, Patnaik S, Bit A, Srivastava SK, Vishwakarma AL, Joshi CG, Kumar D, Jena JK. Genome size estimation and its associations with body length, chromosome number and evolution in teleost fishes. Gene 2023; 864:147294. [PMID: 36858189 DOI: 10.1016/j.gene.2023.147294] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2022] [Revised: 02/07/2023] [Accepted: 02/15/2023] [Indexed: 03/02/2023]
Abstract
Precise estimation of genome size (GS) is vital for various genomic studies, such as deciding genome sequencing depth, genome assembly, biodiversity documentation, evolution, genetic disorders studies, duplication events etc. Animal Genome Size Database provides GS of over 2050 fish species, which ranges from 0.35 pg in pufferfish (Tetraodon nigroviridis) to 132.83 pg in marbled lungfish (Protopterus aethiopicus). The GS of majority of the fishes inhabiting waters of Indian subcontinent are still missing. In present study, we estimated GS of 51 freshwater teleost (31 commercially important, 7 vulnerable and 13 ornamental species) that ranged from 0.58 pg in banded gourami (Trichogaster fasciata) to 1.92 pg in scribbled goby (Awaous grammepomus). Substantial variation in GS was observed within the same fish orders (0.64-1.45 pg in cypriniformes, 0.70-1.41 pg in siluriformes and 0.58-1.92 pg in perciformes). We examined the relationship between the GS, chromosome number and body length across all the fishes. Body length was found to be associated with GS, whereas no relationship was noticed between the GS and the chromosome number. The analysis using ancestral information revealed haploid chromosome number 25, 27 and 24 for the most recent common ancestor of cypriniformes, siluriformes and perciformes, respectively. The study led to generation of new records on GS of 43 fish species and revalidated records for 8 species. The finding is valuable resource for further research in the areas of fish genomics, molecular ecology and evolutionary conservation genetics.
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Affiliation(s)
- Basdeo Kushwaha
- ICAR- National Bureau of Fish Genetic Resources, Canal Ring Road, P.O. Dilkusha, Lucknow, 226 002 Uttar Pradesh, India.
| | - Naresh S Nagpure
- ICAR- National Bureau of Fish Genetic Resources, Canal Ring Road, P.O. Dilkusha, Lucknow, 226 002 Uttar Pradesh, India
| | - Shreya Srivastava
- ICAR- National Bureau of Fish Genetic Resources, Canal Ring Road, P.O. Dilkusha, Lucknow, 226 002 Uttar Pradesh, India
| | - Manmohan Pandey
- ICAR- National Bureau of Fish Genetic Resources, Canal Ring Road, P.O. Dilkusha, Lucknow, 226 002 Uttar Pradesh, India
| | - Ravindra Kumar
- ICAR- National Bureau of Fish Genetic Resources, Canal Ring Road, P.O. Dilkusha, Lucknow, 226 002 Uttar Pradesh, India.
| | - Sudhir Raizada
- ICAR- National Bureau of Fish Genetic Resources, Canal Ring Road, P.O. Dilkusha, Lucknow, 226 002 Uttar Pradesh, India
| | - Suyash Agarwal
- ICAR- National Bureau of Fish Genetic Resources, Canal Ring Road, P.O. Dilkusha, Lucknow, 226 002 Uttar Pradesh, India
| | - Mahender Singh
- ICAR- National Bureau of Fish Genetic Resources, Canal Ring Road, P.O. Dilkusha, Lucknow, 226 002 Uttar Pradesh, India
| | - Valaparamail S Basheer
- PMFGR Division, ICAR-National Bureau of Fish Genetic Resources, CMFRI Campus, Ernakulam North, P.O. Kochi, 682 018 Kerala, India
| | - Rahul G Kumar
- PMFGR Division, ICAR-National Bureau of Fish Genetic Resources, CMFRI Campus, Ernakulam North, P.O. Kochi, 682 018 Kerala, India
| | - Paramananda Das
- ICAR-Central Institute of Freshwater Aquaculture, Kausalyanga, Bhubaneswar, 751 002 Odisha, India
| | - Sofia P Das
- ICAR-Central Institute of Freshwater Aquaculture, Kausalyanga, Bhubaneswar, 751 002 Odisha, India
| | - Siddhi Patnaik
- ICAR-Central Institute of Freshwater Aquaculture, Kausalyanga, Bhubaneswar, 751 002 Odisha, India
| | - Amrita Bit
- ICAR-Central Institute of Freshwater Aquaculture, Kausalyanga, Bhubaneswar, 751 002 Odisha, India
| | - Satish Kumar Srivastava
- Experimental Field Centre, ICAR-Directorate of Coldwater Fisheries Research, Champawat, 262 523 Uttarakhand, India
| | - Achchhe L Vishwakarma
- Flow Cytometry Lab, SAIF Division, CSIR-Central Drug Research Institute, Lucknow, 226 031 Uttar Pradesh, India
| | - Chaitanya G Joshi
- Department of Animal Biotechnology, College of Veterinary Science and Animal Husbandry, Anand Agricultural University, Anand, Gujarat 388 001, India
| | - Dinesh Kumar
- Centre for Agricultural Bio-informatics, ICAR-Indian Agricultural Statistics Research Institute, Library Avenue, New Delhi 110 012, India
| | - Joy K Jena
- ICAR- National Bureau of Fish Genetic Resources, Canal Ring Road, P.O. Dilkusha, Lucknow, 226 002 Uttar Pradesh, India
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12
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Roxo G, Brilhante M, Moura M, de Sequeira MM, Silva L, Costa JC, Vasconcelos R, Talhinhas P, Romeiras MM. Genome size variation within Crithmum maritimum: Clues on the colonization of insular environments. Ecol Evol 2023; 13:e10009. [PMID: 37091572 PMCID: PMC10116024 DOI: 10.1002/ece3.10009] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/07/2022] [Revised: 03/20/2023] [Accepted: 03/31/2023] [Indexed: 04/25/2023] Open
Abstract
Angiosperms present an astonishing diversity of genome sizes that can vary intra- or interspecifically. The remarkable new cytogenomic data shed some light on our understanding of evolution, but few studies were performed with insular and mainland populations to test possible correlations with dispersal, speciation, and adaptations to insular environments. Here, patterns of cytogenomic diversity were assessed among geographic samples (ca. 114) of Crithmum maritimum (Apiaceae), collected across the Azores and Madeira archipelagos, as well as in adjacent continental areas of Portugal. Using flow cytometry, the results indicated a significant intraspecific genome size variation, spanning from reduced sizes in the insular populations to larger ones in the mainland populations. Moreover, there was a tendency for an increase in genome size along the mainland populations, associated with lower temperatures, higher precipitation, and lower precipitation seasonality. However, this gradient might be the result of historic phylogeographical events associated with previous dispersal and extinction of local populations. Overall, our findings provided evidence that smaller genome sizes might play a critical role in the colonization of islands, corroborating other studies that argue that organisms with smaller genomes use fewer resources, having a selective advantage under insular environments. Although further studies are needed to improve our understanding of the mechanisms underlying genome size evolution on islands, conservation strategies must be promoted to protect the rich cytogenomic diversity found among C. maritimum populations, which occur in coastal areas that are particularly threatened by human activity, pollution, invasive species, and climate changes.
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Affiliation(s)
- Guilherme Roxo
- Linking Landscape, Environment, Agriculture and Food (LEAF), Associated Laboratory TERRA, Instituto Superior de Agronomia (ISA)Universidade de Lisboa, Tapada da AjudaLisbonPortugal
- CIBIO‐Azores, Departamento de BiologiaUniversidade dos AçoresPonta DelgadaPortugal
- BIOPOLIS Program in Genomics, Biodiversity and Land PlanningCIBIO Centro de Investigação em Biodiversidade e Recursos Genéticos, Campus de VairãoVairãoPortugal
| | - Miguel Brilhante
- Linking Landscape, Environment, Agriculture and Food (LEAF), Associated Laboratory TERRA, Instituto Superior de Agronomia (ISA)Universidade de Lisboa, Tapada da AjudaLisbonPortugal
| | - Mónica Moura
- CIBIO‐Azores, Departamento de BiologiaUniversidade dos AçoresPonta DelgadaPortugal
- BIOPOLIS Program in Genomics, Biodiversity and Land PlanningCIBIO Centro de Investigação em Biodiversidade e Recursos Genéticos, Campus de VairãoVairãoPortugal
| | | | - Luís Silva
- CIBIO‐Azores, Departamento de BiologiaUniversidade dos AçoresPonta DelgadaPortugal
- BIOPOLIS Program in Genomics, Biodiversity and Land PlanningCIBIO Centro de Investigação em Biodiversidade e Recursos Genéticos, Campus de VairãoVairãoPortugal
| | - José Carlos Costa
- Linking Landscape, Environment, Agriculture and Food (LEAF), Associated Laboratory TERRA, Instituto Superior de Agronomia (ISA)Universidade de Lisboa, Tapada da AjudaLisbonPortugal
| | - Raquel Vasconcelos
- BIOPOLIS Program in Genomics, Biodiversity and Land PlanningCIBIO Centro de Investigação em Biodiversidade e Recursos Genéticos, Campus de VairãoVairãoPortugal
| | - Pedro Talhinhas
- Linking Landscape, Environment, Agriculture and Food (LEAF), Associated Laboratory TERRA, Instituto Superior de Agronomia (ISA)Universidade de Lisboa, Tapada da AjudaLisbonPortugal
| | - Maria M. Romeiras
- Linking Landscape, Environment, Agriculture and Food (LEAF), Associated Laboratory TERRA, Instituto Superior de Agronomia (ISA)Universidade de Lisboa, Tapada da AjudaLisbonPortugal
- Centre for Ecology, Evolution and Environmental Changes (cE3c) & CHANGE—Global Change and Sustainability Institute, Faculdade de CiênciasUniversidade de LisboaLisbonPortugal
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13
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Li D, He M, Tang Q, Tian S, Zhang J, Li Y, Wang D, Jin L, Ning C, Zhu W, Hu S, Long K, Ma J, Liu J, Zhang Z, Li M. Comparative 3D genome architecture in vertebrates. BMC Biol 2022; 20:99. [PMID: 35524220 PMCID: PMC9077971 DOI: 10.1186/s12915-022-01301-7] [Citation(s) in RCA: 17] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/08/2021] [Accepted: 04/20/2022] [Indexed: 12/14/2022] Open
Abstract
BACKGROUND The three-dimensional (3D) architecture of the genome has a highly ordered and hierarchical nature, which influences the regulation of essential nuclear processes at the basis of gene expression, such as gene transcription. While the hierarchical organization of heterochromatin and euchromatin can underlie differences in gene expression that determine evolutionary differences among species, the way 3D genome architecture is affected by evolutionary forces within major lineages remains unclear. Here, we report a comprehensive comparison of 3D genomes, using high resolution Hi-C data in fibroblast cells of fish, chickens, and 10 mammalian species. RESULTS This analysis shows a correlation between genome size and chromosome length that affects chromosome territory (CT) organization in the upper hierarchy of genome architecture, whereas lower hierarchical features, including local transcriptional availability of DNA, are selected through the evolution of vertebrates. Furthermore, conservation of topologically associating domains (TADs) appears strongly associated with the modularity of expression profiles across species. Additionally, LINE and SINE transposable elements likely contribute to heterochromatin and euchromatin organization, respectively, during the evolution of genome architecture. CONCLUSIONS Our analysis uncovers organizational features that appear to determine the conservation and transcriptional regulation of functional genes across species. These findings can guide ongoing investigations of genome evolution by extending our understanding of the mechanisms shaping genome architecture.
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Affiliation(s)
- Diyan Li
- Institute of Animal Genetics and Breeding, College of Animal Science and Technology, Sichuan Agricultural University, Chengdu, 611130, China
| | - Mengnan He
- Institute of Animal Genetics and Breeding, College of Animal Science and Technology, Sichuan Agricultural University, Chengdu, 611130, China
| | - Qianzi Tang
- Institute of Animal Genetics and Breeding, College of Animal Science and Technology, Sichuan Agricultural University, Chengdu, 611130, China
| | - Shilin Tian
- Department of Ecology, Tibetan Centre for Ecology and Conservation at WHU-TU, Hubei Key Laboratory of Cell Homeostasis, College of Life Sciences, Wuhan University, Wuhan, 430072, China
- Novogene Bioinformatics Institute, Beijing, 100000, China
| | - Jiaman Zhang
- Institute of Animal Genetics and Breeding, College of Animal Science and Technology, Sichuan Agricultural University, Chengdu, 611130, China
| | - Yan Li
- Institute of Animal Genetics and Breeding, College of Animal Science and Technology, Sichuan Agricultural University, Chengdu, 611130, China
| | - Danyang Wang
- CAS Key Laboratory of Genome Sciences and Information, Beijing Institute of Genomics, Chinese Academy of Sciences and China National Center for Bioinformation, Beijing, 100101, China
- University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Long Jin
- Institute of Animal Genetics and Breeding, College of Animal Science and Technology, Sichuan Agricultural University, Chengdu, 611130, China
| | - Chunyou Ning
- Institute of Animal Genetics and Breeding, College of Animal Science and Technology, Sichuan Agricultural University, Chengdu, 611130, China
| | - Wei Zhu
- Institute of Animal Genetics and Breeding, College of Animal Science and Technology, Sichuan Agricultural University, Chengdu, 611130, China
| | - Silu Hu
- Institute of Animal Genetics and Breeding, College of Animal Science and Technology, Sichuan Agricultural University, Chengdu, 611130, China
| | - Keren Long
- Institute of Animal Genetics and Breeding, College of Animal Science and Technology, Sichuan Agricultural University, Chengdu, 611130, China
| | - Jideng Ma
- Institute of Animal Genetics and Breeding, College of Animal Science and Technology, Sichuan Agricultural University, Chengdu, 611130, China
| | - Jing Liu
- University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Zhihua Zhang
- CAS Key Laboratory of Genome Sciences and Information, Beijing Institute of Genomics, Chinese Academy of Sciences and China National Center for Bioinformation, Beijing, 100101, China.
- University of Chinese Academy of Sciences, Beijing, 100049, China.
- School of Artificial Intelligence, University of Chinese Academy of Sciences, Beijing, 100049, China.
| | - Mingzhou Li
- Institute of Animal Genetics and Breeding, College of Animal Science and Technology, Sichuan Agricultural University, Chengdu, 611130, China.
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14
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Heckenhauer J, Frandsen PB, Sproul JS, Li Z, Paule J, Larracuente AM, Maughan PJ, Barker MS, Schneider JV, Stewart RJ, Pauls SU. Genome size evolution in the diverse insect order Trichoptera. Gigascience 2022; 11:6537159. [PMID: 35217860 PMCID: PMC8881205 DOI: 10.1093/gigascience/giac011] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/18/2021] [Revised: 11/25/2021] [Accepted: 01/21/2022] [Indexed: 12/30/2022] Open
Abstract
Background Genome size is implicated in the form, function, and ecological success of a species. Two principally different mechanisms are proposed as major drivers of eukaryotic genome evolution and diversity: polyploidy (i.e., whole-genome duplication) or smaller duplication events and bursts in the activity of repetitive elements. Here, we generated de novo genome assemblies of 17 caddisflies covering all major lineages of Trichoptera. Using these and previously sequenced genomes, we use caddisflies as a model for understanding genome size evolution in diverse insect lineages. Results We detect a ∼14-fold variation in genome size across the order Trichoptera. We find strong evidence that repetitive element expansions, particularly those of transposable elements (TEs), are important drivers of large caddisfly genome sizes. Using an innovative method to examine TEs associated with universal single-copy orthologs (i.e., BUSCO genes), we find that TE expansions have a major impact on protein-coding gene regions, with TE-gene associations showing a linear relationship with increasing genome size. Intriguingly, we find that expanded genomes preferentially evolved in caddisfly clades with a higher ecological diversity (i.e., various feeding modes, diversification in variable, less stable environments). Conclusion Our findings provide a platform to test hypotheses about the potential evolutionary roles of TE activity and TE-gene associations, particularly in groups with high species, ecological, and functional diversities.
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Affiliation(s)
- Jacqueline Heckenhauer
- LOEWE Centre for Translational Biodiversity Genomics (LOEWE-TBG), Frankfurt 60325, Germany.,Department of Terrestrial Zoology, Senckenberg Research Institute and Natural History Museum Frankfurt, Frankfurt 60325, Germany
| | - Paul B Frandsen
- LOEWE Centre for Translational Biodiversity Genomics (LOEWE-TBG), Frankfurt 60325, Germany.,Department of Plant & Wildlife Sciences, Brigham Young University, Provo, UT 84602, USA.,Data Science Lab, Smithsonian Institution, Washington, DC 20560, USA
| | - John S Sproul
- Department of Biology, University of Rochester, Rochester, NY 14620, USA.,Department of Biology, University of Nebraska Omaha, Omaha, NE 68182, USA
| | - Zheng Li
- Department of Ecology and Evolutionary Biology, University of Arizona, Tucson, AZ 85721, USA
| | - Juraj Paule
- Department of Botany and Molecular Evolution, Senckenberg Research Institute and Natural History Museum Frankfurt, Frankfurt 60325, Germany
| | | | - Peter J Maughan
- Department of Plant & Wildlife Sciences, Brigham Young University, Provo, UT 84602, USA
| | - Michael S Barker
- Department of Ecology and Evolutionary Biology, University of Arizona, Tucson, AZ 85721, USA
| | - Julio V Schneider
- Department of Terrestrial Zoology, Senckenberg Research Institute and Natural History Museum Frankfurt, Frankfurt 60325, Germany
| | - Russell J Stewart
- Department of Biomedical Engineering, University of Utah, Salt Lake City, UT 84112, USA
| | - Steffen U Pauls
- LOEWE Centre for Translational Biodiversity Genomics (LOEWE-TBG), Frankfurt 60325, Germany.,Department of Terrestrial Zoology, Senckenberg Research Institute and Natural History Museum Frankfurt, Frankfurt 60325, Germany.,Institute for Insect Biotechnology, Justus-Liebig-University, Gießen 35390, Germany
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15
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Dai SF, Zhu XG, Hutang GR, Li JY, Tian JQ, Jiang XH, Zhang D, Gao LZ. Genome Size Variation and Evolution Driven by Transposable Elements in the Genus Oryza. FRONTIERS IN PLANT SCIENCE 2022; 13:921937. [PMID: 35874017 PMCID: PMC9301470 DOI: 10.3389/fpls.2022.921937] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/16/2022] [Accepted: 05/16/2022] [Indexed: 05/08/2023]
Abstract
Genome size variation and evolutionary forces behind have been long pursued in flowering plants. The genus Oryza, consisting of approximately 25 wild species and two cultivated rice, harbors eleven extant genome types, six of which are diploid (AA, BB, CC, EE, FF, and GG) and five of which are tetraploid (BBCC, CCDD, HHJJ, HHKK, and KKLL). To obtain the most comprehensive knowledge of genome size variation in the genus Oryza, we performed flow cytometry experiments and estimated genome sizes of 166 accessions belonging to 16 non-AA genome Oryza species. k-mer analyses were followed to verify the experimental results of the two accessions for each species. Our results showed that genome sizes largely varied fourfold in the genus Oryza, ranging from 279 Mb in Oryza brachyantha (FF) to 1,203 Mb in Oryza ridleyi (HHJJ). There was a 2-fold variation (ranging from 570 to 1,203 Mb) in genome size among the tetraploid species, while the diploid species had 3-fold variation, ranging from 279 Mb in Oryza brachyantha (FF) to 905 Mb in Oryza australiensis (EE). The genome sizes of the tetraploid species were not always two times larger than those of the diploid species, and some diploid species even had larger genome sizes than those of tetraploids. Nevertheless, we found that genome sizes of newly formed allotetraploids (BBCC-) were almost equal to totaling genome sizes of their parental progenitors. Our results showed that the species belonging to the same genome types had similar genome sizes, while genome sizes exhibited a gradually decreased trend during the evolutionary process in the clade with AA, BB, CC, and EE genome types. Comparative genomic analyses further showed that the species with different rice genome types may had experienced dissimilar amplification histories of retrotransposons, resulting in remarkably different genome sizes. On the other hand, the closely related rice species may have experienced similar amplification history. We observed that the contents of transposable elements, long terminal repeats (LTR) retrotransposons, and particularly LTR/Gypsy retrotransposons varied largely but were significantly correlated with genome sizes. Therefore, this study demonstrated that LTR retrotransposons act as an active driver of genome size variation in the genus Oryza.
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Affiliation(s)
- Shuang-feng Dai
- Institution of Genomics and Bioinformatics, South China Agricultural University, Guangzhou, China
| | - Xun-ge Zhu
- Plant Germplasm and Genomics Center, Kunming Institute of Botany, Chinese Academy of Sciences, Kunming, China
| | - Ge-rang Hutang
- Plant Germplasm and Genomics Center, Kunming Institute of Botany, Chinese Academy of Sciences, Kunming, China
| | - Jia-yue Li
- Institution of Genomics and Bioinformatics, South China Agricultural University, Guangzhou, China
| | - Jia-qi Tian
- Institution of Genomics and Bioinformatics, South China Agricultural University, Guangzhou, China
| | - Xian-hui Jiang
- Institution of Genomics and Bioinformatics, South China Agricultural University, Guangzhou, China
| | - Dan Zhang
- College of Tropical Crops, Hainan University, Haikou, China
| | - Li-zhi Gao
- Institution of Genomics and Bioinformatics, South China Agricultural University, Guangzhou, China
- Plant Germplasm and Genomics Center, Kunming Institute of Botany, Chinese Academy of Sciences, Kunming, China
- College of Tropical Crops, Hainan University, Haikou, China
- *Correspondence: Li-zhi Gao,
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16
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Roxo G, Moura M, Talhinhas P, Costa JC, Silva L, Vasconcelos R, de Sequeira MM, Romeiras MM. Diversity and Cytogenomic Characterization of Wild Carrots in the Macaronesian Islands. PLANTS 2021; 10:plants10091954. [PMID: 34579486 PMCID: PMC8473144 DOI: 10.3390/plants10091954] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/31/2021] [Revised: 09/07/2021] [Accepted: 09/17/2021] [Indexed: 11/23/2022]
Abstract
The Macaronesian islands constitute an enormous reservoir of genetic variation of wild carrots (subtribe Daucinae; Apiaceae), including 10 endemic species, but an accurate understanding of the diversification processes within these islands is still lacking. We conducted a review of the morphology, ecology, and conservation status of the Daucinae species and, on the basis of a comprehensive dataset, we estimated the genome size variation for 16 taxa (around 320 samples) occurring in different habitats across the Macaronesian islands in comparison to mainland specimens. Results showed that taxa with larger genomes (e.g., Daucus crinitus: 2.544 pg) were generally found in mainland regions, while the insular endemic taxa from Azores and Cabo Verde have smaller genomes. Melanoselinum decipiens and Monizia edulis, both endemic to Madeira Island, showed intermediate values. Positive correlations were found between mean genome size and some morphological traits (e.g., spiny or winged fruits) and also with habit (herbaceous or woody). Despite the great morphological variation found within the Cabo Verde endemic species, the 2C-values obtained were quite homogeneous between these taxa and the subspecies of Daucus carota, supporting the close relationship among these taxa. Overall, this study improved the global knowledge of DNA content for Macaronesian endemics and shed light into the mechanisms underpinning diversity patterns of wild carrots in the western Mediterranean region.
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Affiliation(s)
- Guilherme Roxo
- Linking Landscape, Environment, Agriculture and Food (LEAF), Instituto Superior de Agronomia (ISA), Universidade de Lisboa, Tapada da Ajuda, 1340-017 Lisbon, Portugal; (G.R.); (P.T.); (J.C.C.)
- CIBIO, Centro de Investigação em Biodiversidade e Recursos Genéticos, InBIO Laboratório Associado, Universidade do Porto, 4485-661 Vairão, Portugal;
| | - Mónica Moura
- CIBIO, Centro de Investigação em Biodiversidade e Recursos Genéticos, CIBIO-Azores, Departamento de Biologia, Universidade dos Açores, Rua Mãe de Deus 58, Apartado 1422, 9501-801 Ponta Delgada, Portugal; (M.M.); (L.S.); (M.M.d.S.)
| | - Pedro Talhinhas
- Linking Landscape, Environment, Agriculture and Food (LEAF), Instituto Superior de Agronomia (ISA), Universidade de Lisboa, Tapada da Ajuda, 1340-017 Lisbon, Portugal; (G.R.); (P.T.); (J.C.C.)
| | - José Carlos Costa
- Linking Landscape, Environment, Agriculture and Food (LEAF), Instituto Superior de Agronomia (ISA), Universidade de Lisboa, Tapada da Ajuda, 1340-017 Lisbon, Portugal; (G.R.); (P.T.); (J.C.C.)
| | - Luís Silva
- CIBIO, Centro de Investigação em Biodiversidade e Recursos Genéticos, CIBIO-Azores, Departamento de Biologia, Universidade dos Açores, Rua Mãe de Deus 58, Apartado 1422, 9501-801 Ponta Delgada, Portugal; (M.M.); (L.S.); (M.M.d.S.)
| | - Raquel Vasconcelos
- CIBIO, Centro de Investigação em Biodiversidade e Recursos Genéticos, InBIO Laboratório Associado, Universidade do Porto, 4485-661 Vairão, Portugal;
| | - Miguel Menezes de Sequeira
- CIBIO, Centro de Investigação em Biodiversidade e Recursos Genéticos, CIBIO-Azores, Departamento de Biologia, Universidade dos Açores, Rua Mãe de Deus 58, Apartado 1422, 9501-801 Ponta Delgada, Portugal; (M.M.); (L.S.); (M.M.d.S.)
- Madeira Botanical Group, Faculty of Life Sciences, University of Madeira, 9020-105 Funchal, Portugal
| | - Maria Manuel Romeiras
- Linking Landscape, Environment, Agriculture and Food (LEAF), Instituto Superior de Agronomia (ISA), Universidade de Lisboa, Tapada da Ajuda, 1340-017 Lisbon, Portugal; (G.R.); (P.T.); (J.C.C.)
- Centre for Ecology, Evolution and Environmental Changes (cE3c), Faculdade de Ciências, Universidade de Lisboa, Campo Grande, 1749-016 Lisbon, Portugal
- Correspondence:
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17
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Wan H, Wei Q, Ji Q, Lan H, Dai X, Chen W, Dong Y, Zeng C. The karyotype, genome survey, and assembly of Mud artemisia (Artemisia selengensis). Mol Biol Rep 2021; 48:5897-5904. [PMID: 34297325 DOI: 10.1007/s11033-021-06584-7] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/20/2021] [Accepted: 07/20/2021] [Indexed: 11/30/2022]
Abstract
BACKGROUND Artemisia selengensis is traditional Chinese medicine and phytochemical analysis indicated that A. selengensis contains essential oils, fatty acids and phenolic acids. The lack of reference genomic information may lead to tardiness in molecular biology research of A. selengensis. METHOD AND RESULTS Karyotype analysis, genome survey, and genome assembly was employed to acquire information on the genome structure of A. selengensis. The chromosome number is 2n = 2x = 36, karyotype formula is 28 m + 8Sm, karyotype asymmetry coefficient is 58.8%, and karyotypes were symmetric to Stebbins' type 2A. Besides, the flow cytometry findings reported that the mean peak value of fluorescent intensity is 1,170,677, 2C DNA content is 12 pg and the genome size was estimated to be approximately 5.87 Gb. Furthermore, the genome survey generates 341,478,078 clean reads, unfortunately, after K-mer analysis, no significant peak can be observed, the heterozygosity, repetitive rate and genome size was unable to estimated. It is speculated that this phenomenon might be due to the complexity of genome structure. 37,266 contigs are preliminary assembled with Oxford Nanopore Technology (ONT) sequencing, totaling 804 Mb and GC content was 34.08%. The total length is 804,475,881 bp, N50 is 29,624 bp, and the largest contig length is 239,792 bp. CONCLUSION This study reveals the preliminary information of genome size of A. selengensis. These findings may provide supportive information for sequencing and assembly of whole-genome sequencing and encourage the progress of functional gene discovery, genetic improvement, evolutionary study, and structural studies of A. selengensis.
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Affiliation(s)
- Heping Wan
- Hubei Engineering Research Center for Protection and Utilization of Special Biological Resources in the Hanjiang River BasinSchool of Life Science, Jianghan University, Wuhan, 430056, China
| | - Qingying Wei
- Hubei Engineering Research Center for Protection and Utilization of Special Biological Resources in the Hanjiang River BasinSchool of Life Science, Jianghan University, Wuhan, 430056, China
| | - Qiangqiang Ji
- Hubei Engineering Research Center for Protection and Utilization of Special Biological Resources in the Hanjiang River BasinSchool of Life Science, Jianghan University, Wuhan, 430056, China
| | - Hong Lan
- Hubei Engineering Research Center for Protection and Utilization of Special Biological Resources in the Hanjiang River BasinSchool of Life Science, Jianghan University, Wuhan, 430056, China
| | - Xigang Dai
- Hubei Engineering Research Center for Protection and Utilization of Special Biological Resources in the Hanjiang River BasinSchool of Life Science, Jianghan University, Wuhan, 430056, China
| | - Weida Chen
- Hubei Engineering Research Center for Protection and Utilization of Special Biological Resources in the Hanjiang River BasinSchool of Life Science, Jianghan University, Wuhan, 430056, China
| | - Yuanhuo Dong
- Hubei Engineering Research Center for Protection and Utilization of Special Biological Resources in the Hanjiang River BasinSchool of Life Science, Jianghan University, Wuhan, 430056, China
| | - Changli Zeng
- Hubei Engineering Research Center for Protection and Utilization of Special Biological Resources in the Hanjiang River BasinSchool of Life Science, Jianghan University, Wuhan, 430056, China.
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18
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Yuan H, Huang Y, Mao Y, Zhang N, Nie Y, Zhang X, Zhou Y, Mao S. The Evolutionary Patterns of Genome Size in Ensifera (Insecta: Orthoptera). Front Genet 2021; 12:693541. [PMID: 34249107 PMCID: PMC8261143 DOI: 10.3389/fgene.2021.693541] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/11/2021] [Accepted: 05/25/2021] [Indexed: 11/13/2022] Open
Abstract
Genomic size variation has long been a focus for biologists. However, due to the lack of genome size data, the mechanisms behind this variation and the biological significance of insect genome size are rarely studied systematically. The detailed taxonomy and phylogeny of the Ensifera, as well as the extensive documentation concerning their morphological, ecological, behavioral, and distributional characteristics, make them a strong model for studying the important scientific problem of genome size variation. However, data on the genome size of Ensifera are rather sparse. In our study, we used flow cytometry to determine the genome size of 32 species of Ensifera, the smallest one being only 1C = 0.952 pg with the largest species up to 1C = 19.135 pg, representing a 20-fold range. This provides a broader blueprint for the genome size variation of Orthoptera than was previously available. We also completed the assembly of nine mitochondrial genomes and combined mitochondrial genome data from public databases to construct phylogenetic trees containing 32 species of Ensifera and three outgroups. Based on these inferred phylogenetic trees, we detected the phylogenetic signal of genome size variation in Ensifera and found that it was strong in both males and females. Phylogenetic comparative analyses revealed that there were no correlations between genome size and body size or flight ability in Tettigoniidae. Reconstruction of ancestral genome size revealed that the genome size of Ensifera evolved in a complex pattern, in which the genome size of the grylloid clade tended to decrease while that of the non-grylloid clade expanded significantly albeit with fluctuations. However, the evolutionary mechanisms underlying variation of genome size in Ensifera are still unknown.
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Affiliation(s)
- Hao Yuan
- College of Life Sciences, Shaanxi Normal University, Xi'an, China
| | - Yuan Huang
- College of Life Sciences, Shaanxi Normal University, Xi'an, China
| | - Ying Mao
- College of Life Sciences, Shaanxi Normal University, Xi'an, China
| | - Nan Zhang
- College of Life Sciences, Shaanxi Normal University, Xi'an, China
| | - Yimeng Nie
- College of Life Sciences, Shaanxi Normal University, Xi'an, China
| | - Xue Zhang
- College of Life Sciences, Shaanxi Normal University, Xi'an, China
| | - Yafu Zhou
- Xi'an Botanical Garden of Shaanxi Province/Institute of Botany of Shaanxi Province, Shaanxi Engineering Research Centre for Conservation and Utilization of Botanical Resources, Xi'an, China
| | - Shaoli Mao
- Xi'an Botanical Garden of Shaanxi Province/Institute of Botany of Shaanxi Province, Shaanxi Engineering Research Centre for Conservation and Utilization of Botanical Resources, Xi'an, China
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19
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Kumar P, Choudhary M, Jat BS, Kumar B, Singh V, Kumar V, Singla D, Rakshit S. Skim sequencing: an advanced NGS technology for crop improvement. J Genet 2021. [DOI: 10.1007/s12041-021-01285-3] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
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20
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Stelzer CP, Pichler M, Hatheuer A. Linking genome size variation to population phenotypic variation within the rotifer, Brachionus asplanchnoidis. Commun Biol 2021; 4:596. [PMID: 34011946 PMCID: PMC8134563 DOI: 10.1038/s42003-021-02131-z] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/02/2020] [Accepted: 04/19/2021] [Indexed: 11/17/2022] Open
Abstract
Eukaryotic organisms usually contain much more genomic DNA than expected from their biological complexity. In explaining this pattern, selection-based hypotheses suggest that genome size evolves through selection acting on correlated life history traits, implicitly assuming the existence of phenotypic effects of (extra) genomic DNA that are independent of its information content. Here, we present conclusive evidence of such phenotypic effects within a well-mixed natural population that shows heritable variation in genome size. We found that genome size is positively correlated with body size, egg size, and embryonic development time in a population of the monogonont rotifer Brachionus asplanchnoidis. The effect on embryonic development time was mediated partly by an indirect effect (via egg size), and a direct effect, the latter indicating an increased replication cost of the larger amounts of DNA during mitosis. Our results suggest that selection-based change of genome size can operate in this population, provided it is strong enough to overcome drift or mutational change of genome size.
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Affiliation(s)
| | - Maria Pichler
- University of Innsbruck, Mondseestr. 9, 5310, Mondsee, Austria
| | - Anita Hatheuer
- University of Innsbruck, Mondseestr. 9, 5310, Mondsee, Austria
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21
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Glazier DS. Genome Size Covaries More Positively with Propagule Size than Adult Size: New Insights into an Old Problem. BIOLOGY 2021; 10:270. [PMID: 33810583 PMCID: PMC8067107 DOI: 10.3390/biology10040270] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/10/2021] [Revised: 03/18/2021] [Accepted: 03/23/2021] [Indexed: 12/17/2022]
Abstract
The body size and (or) complexity of organisms is not uniformly related to the amount of genetic material (DNA) contained in each of their cell nuclei ('genome size'). This surprising mismatch between the physical structure of organisms and their underlying genetic information appears to relate to variable accumulation of repetitive DNA sequences, but why this variation has evolved is little understood. Here, I show that genome size correlates more positively with egg size than adult size in crustaceans. I explain this and comparable patterns observed in other kinds of animals and plants as resulting from genome size relating strongly to cell size in most organisms, which should also apply to single-celled eggs and other reproductive propagules with relatively few cells that are pivotal first steps in their lives. However, since body size results from growth in cell size or number or both, it relates to genome size in diverse ways. Relationships between genome size and body size should be especially weak in large organisms whose size relates more to cell multiplication than to cell enlargement, as is generally observed. The ubiquitous single-cell 'bottleneck' of life cycles may affect both genome size and composition, and via both informational (genotypic) and non-informational (nucleotypic) effects, many other properties of multicellular organisms (e.g., rates of growth and metabolism) that have both theoretical and practical significance.
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22
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Hermaniuk A, van de Pol ILE, Verberk WCEP. Are acute and acclimated thermal effects on metabolic rate modulated by cell size? A comparison between diploid and triploid zebrafish larvae. J Exp Biol 2021; 224:jeb227124. [PMID: 33257437 DOI: 10.1242/jeb.227124] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/20/2020] [Accepted: 11/19/2020] [Indexed: 12/13/2022]
Abstract
Being composed of small cells may carry energetic costs related to maintaining ionic gradients across cell membranes as well as benefits related to diffusive oxygen uptake. Here, we test the hypothesis that these costs and benefits of cell size in ectotherms are temperature dependent. To study the consequences of cell size for whole-organism metabolic rate, we compared diploid and triploid zebrafish larvae differing in cell size. A fully factorial design was applied combining three different rearing and test temperatures that allowed us to distinguish acute from acclimated thermal effects. Individual oxygen consumption rates of diploid and triploid larvae across declining levels of oxygen availability were measured. We found that both acute and acclimated thermal effects affected the metabolic response. In comparison with triploids, diploids responded more strongly to acute temperatures, especially when reared at the highest temperature. These observations support the hypothesis that animals composed of smaller cells (i.e. diploids) are less vulnerable to oxygen limitation in warm aquatic habitats. Furthermore, we found slightly improved hypoxia tolerance in diploids. By contrast, warm-reared triploids had higher metabolic rates when they were tested at acute cold temperature, suggesting that being composed of larger cells may provide metabolic advantages in the cold. We offer two mechanisms as a potential explanation of this result, related to homeoviscous adaptation of membrane function and the mitigation of developmental noise. Our results suggest that being composed of larger cells provides metabolic advantages in cold water, while being composed of smaller cells provides metabolic advantages in warm water.
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Affiliation(s)
- Adam Hermaniuk
- Department of Evolutionary and Physiological Ecology, Faculty of Biology, University of Białystok, Ciołkowskiego 1J, 15-245 Białystok, Poland
| | - Iris L E van de Pol
- Department of Animal Ecology and Physiology, Institute for Water and Wetland Research, Radboud University, 6525 AJ Nijmegen, The Netherlands
| | - Wilco C E P Verberk
- Department of Animal Ecology and Physiology, Institute for Water and Wetland Research, Radboud University, 6525 AJ Nijmegen, The Netherlands
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23
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Lunkova NF, Zhukovskaya NV, Ivanov VB. Relationship of the Holoploid DNA Content with the Life Form and Duration of Plants’ Life Cycle. Russ J Dev Biol 2020. [DOI: 10.1134/s1062360420060041] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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24
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Uncovering patterns of the evolution of genomic sequence entropy and complexity. Mol Genet Genomics 2020; 296:289-298. [PMID: 33252723 DOI: 10.1007/s00438-020-01729-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/19/2019] [Accepted: 09/22/2020] [Indexed: 10/22/2022]
Abstract
The lack of consensus concerning the biological meaning of entropy and complexity of genomes and the different ways to assess these data hamper conclusions concerning what are the causes of genomic entropy variation among species. This study aims to evaluate the entropy and complexity of genomic sequences of several species without using homologies to assess relationships among these variables and non-molecular data (e.g., the number of individuals) to seek a trigger of interspecific genomic entropy variation. The results indicate a relationship among genomic entropy, genome size, genomic complexity, and the number of individuals: species with a small number of individuals harbors large genome, and hence, low entropy but a higher complexity. We defined that the complexity of a genome relies on the entropy of each DNA segment within genome. Then, the entropy and complexity of a genome reflects its organization solely. Exons of vertebrates harbor smaller entropies than non-exon regions (likely by the repeats that accumulated from duplications), whereas other taxonomic groups do not present this pattern. Our findings suggest that small initial population might have defined current genomic entropy and complexity: actual genomes are less complex than ancestral ones. Besides, our data disagree with the relationship between phenotype and genomic entropies previously established. Finally, by establishing the relationship between genomic entropy/complexity with the number of individuals and genome size, under an evolutive perspective, ideas concerning the genomic variability may emerge.
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25
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Sidorova A, Tverdislov V, Levashova N, Garaeva A. A model of autowave self-organization as a hierarchy of active media in the biological evolution. Biosystems 2020; 198:104234. [PMID: 32889101 DOI: 10.1016/j.biosystems.2020.104234] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/22/2020] [Revised: 08/23/2020] [Accepted: 08/24/2020] [Indexed: 11/28/2022]
Abstract
Within the framework of the active media concept, we develop a biophysical model of autowave self-organization which is treated as a hierarchy of active media in the evolution of the biosphere. We also propose a mathematical model of the autowave process of speciation in a flow of mutations for the three main taxonometric groups (prokaryotes, unicellular and multicellular eukaryotes) with a naturally determined lower boundary of living matter (the appearance of prokaryotes) and an open upper boundary for the formation of new species. It is shown that the fluctuation-bifurcation description of the evolution for the formation of new taxonometric groups as a trajectory of transformation of small fluctuations into giant ones adequately reflects the process of self-organization during the formation of taxa. The major concepts of biological evolution, conditions of hierarchy formation as a fundamental manifestation of self-organization and complexity in the evolution of biological systems are considered.
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Affiliation(s)
- Alla Sidorova
- Department of Biophysics, Faculty of Physics, Lomonosov Moscow State University, Moscow, 119991, Russia.
| | - Vsevolod Tverdislov
- Head of the Department of Biophysics, Faculty of Physics, Lomonosov Moscow State University, Moscow, 119991, Russia.
| | - Natalia Levashova
- Department of Mathematics, Faculty of Physics, Lomonosov Moscow State University, Moscow, 119991, Russia.
| | - Anastasia Garaeva
- Postgraduate Student of the Department of Biophysics, Faculty of Physics, Lomonosov Moscow State University, Moscow, 119991, Russia.
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26
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Blommaert J. Genome size evolution: towards new model systems for old questions. Proc Biol Sci 2020; 287:20201441. [PMID: 32842932 PMCID: PMC7482279 DOI: 10.1098/rspb.2020.1441] [Citation(s) in RCA: 44] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/18/2020] [Accepted: 07/29/2020] [Indexed: 12/20/2022] Open
Abstract
Genome size (GS) variation is a fundamental biological characteristic; however, its evolutionary causes and consequences are the topic of ongoing debate. Whether GS is a neutral trait or one subject to selective pressures, and how strong these selective pressures are, may remain open questions. Fundamentally, the genomic sequences responsible for this variation directly impact the potential evolutionary outcomes and, equally, are the targets of different evolutionary pressures. For example, duplications and deletions of genic regions (large or small) can have immediate and drastic phenotypic effects, while an expansion or contraction of non-coding DNA is less likely to cause catastrophic phenotypic effects. However, in the long term, the accumulation or deletion of ncDNA is likely to have larger effects. Modern sequencing technologies are allowing for the dissection of these proximate causes, but a combination of these new technologies with more traditional evolutionary experiments and approaches could revolutionize this debate and potentially resolve many of these arguments. Here, I discuss an ambitious way forward for GS research, putting it in context of historical debates, theories and sometimes contradictory evidence, and highlighting the promise of combining new sequencing technologies and analytical developments with more traditional experimental evolution approaches.
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Affiliation(s)
- Julie Blommaert
- Department of Organismal Biology, Uppsala University, Uppsala, Sweden
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27
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Piégu B, Arensburger P, Beauclair L, Chabault M, Raynaud E, Coustham V, Brard S, Guizard S, Burlot T, Le Bihan-Duval E, Bigot Y. Variations in genome size between wild and domesticated lineages of fowls belonging to the Gallus gallus species. Genomics 2020; 112:1660-1673. [DOI: 10.1016/j.ygeno.2019.10.004] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/11/2019] [Revised: 08/05/2019] [Accepted: 10/07/2019] [Indexed: 11/26/2022]
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Abstract
The genetic control of the characteristic cell sizes of different species and tissues is a long-standing enigma. Plants are convenient for studying this question in a multicellular context, as their cells do not move and are easily tracked and measured from organ initiation in the meristems to subsequent morphogenesis and differentiation. In this article, we discuss cell size control in plants compared with other organisms. As seen from yeast cells to mammalian cells, size homeostasis is maintained cell autonomously in the shoot meristem. In developing organs, vacuolization contributes to cell size heterogeneity and may resolve conflicts between growth control at the cellular and organ levels. Molecular mechanisms for cell size control have implications for how cell size responds to changes in ploidy, which are particularly important in plant development and evolution. We also discuss comparatively the functional consequences of cell size and their potential repercussions at higher scales, including genome evolution.
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Affiliation(s)
- Marco D'Ario
- Department of Cell and Developmental Biology, John Innes Centre, Norwich Research Park, Norwich NR4 7UH, United Kingdom
| | - Robert Sablowski
- Department of Cell and Developmental Biology, John Innes Centre, Norwich Research Park, Norwich NR4 7UH, United Kingdom
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30
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Finke A, Mandáková T, Nawaz K, Vu GTH, Novák P, Macas J, Lysak MA, Pecinka A. Genome invasion by a hypomethylated satellite repeat in Australian crucifer Ballantinia antipoda. THE PLANT JOURNAL : FOR CELL AND MOLECULAR BIOLOGY 2019; 99:1066-1079. [PMID: 31074166 DOI: 10.1111/tpj.14380] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/07/2017] [Revised: 04/02/2019] [Accepted: 04/24/2019] [Indexed: 06/09/2023]
Abstract
Repetitive sequences are ubiquitous components of all eukaryotic genomes. They contribute to genome evolution and the regulation of gene transcription. However, the uncontrolled activity of repetitive sequences can negatively affect genome functions and stability. Therefore, repetitive DNAs are embedded in a highly repressive heterochromatic environment in plant cell nuclei. Here, we analyzed the sequence, composition and the epigenetic makeup of peculiar non-pericentromeric heterochromatic segments in the genome of the Australian crucifer Ballantinia antipoda. By the combination of high throughput sequencing, graph-based clustering and cytogenetics, we found that the heterochromatic segments consist of a mixture of unique sequences and an A-T-rich 174 bp satellite repeat (BaSAT1). BaSAT1 occupies about 10% of the B. antipoda nuclear genome in >250 000 copies. Unlike many other highly repetitive sequences, BaSAT1 repeats are hypomethylated; this contrasts with the normal patterns of DNA methylation in the B. antipoda genome. Detailed analysis of several copies revealed that these non-methylated BaSAT1 repeats were also devoid of heterochromatic histone H3K9me2 methylation. However, the factors decisive for the methylation status of BaSAT1 repeats remain currently unknown. In summary, we show that even highly repetitive sequences can exist as hypomethylated in the plant nuclear genome.
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Affiliation(s)
- Andreas Finke
- Max Planck Institute for Plant Breeding Research (MPIPZ), Cologne, 50829, Germany
| | - Terezie Mandáková
- Plant Cytogenomics Research Group, CEITEC - Central-European Institute of Technology, Masaryk University, Brno, 62500, Czech Republic
| | - Kashif Nawaz
- Max Planck Institute for Plant Breeding Research (MPIPZ), Cologne, 50829, Germany
- The Czech Academy of Sciences, Institute of Experimental Botany (IEB), Centre of the Region Haná for Agricultural and Biotechnological Research (CRH), Olomouc, 77900, Czech Republic
| | - Giang T H Vu
- Max Planck Institute for Plant Breeding Research (MPIPZ), Cologne, 50829, Germany
| | - Petr Novák
- Biology Centre, The Czech Academy of Sciences, České Budejovice, 37005, Czech Republic
| | - Jiri Macas
- Biology Centre, The Czech Academy of Sciences, České Budejovice, 37005, Czech Republic
| | - Martin A Lysak
- Plant Cytogenomics Research Group, CEITEC - Central-European Institute of Technology, Masaryk University, Brno, 62500, Czech Republic
| | - Ales Pecinka
- Max Planck Institute for Plant Breeding Research (MPIPZ), Cologne, 50829, Germany
- The Czech Academy of Sciences, Institute of Experimental Botany (IEB), Centre of the Region Haná for Agricultural and Biotechnological Research (CRH), Olomouc, 77900, Czech Republic
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31
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Blommaert J, Riss S, Hecox-Lea B, Mark Welch DB, Stelzer CP. Small, but surprisingly repetitive genomes: transposon expansion and not polyploidy has driven a doubling in genome size in a metazoan species complex. BMC Genomics 2019; 20:466. [PMID: 31174483 PMCID: PMC6555955 DOI: 10.1186/s12864-019-5859-y] [Citation(s) in RCA: 27] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/22/2019] [Accepted: 05/29/2019] [Indexed: 02/01/2023] Open
Abstract
BACKGROUND The causes and consequences of genome size variation across Eukaryotes, which spans five orders of magnitude, have been hotly debated since before the advent of genome sequencing. Previous studies have mostly examined variation among larger taxonomic units (e.g., orders, or genera), while comparisons among closely related species are rare. Rotifers of the Brachionus plicatilis species complex exhibit a seven-fold variation in genome size and thus represent a unique opportunity to study such changes on a relatively short evolutionary timescale. Here, we sequenced and analysed the genomes of four species of this complex with nuclear DNA contents spanning 110-422 Mbp. To establish the likely mechanisms of genome size change, we analysed both sequencing read libraries and assemblies for signatures of polyploidy and repetitive element content. We also compared these genomes to that of B. calyciflorus, the closest relative with a sequenced genome (293 Mbp nuclear DNA content). RESULTS Despite the very large differences in genome size, we saw no evidence of ploidy level changes across the B. plicatilis complex. However, repetitive element content explained a large portion of genome size variation (at least 54%). The species with the largest genome, B. asplanchnoidis, has a strikingly high 44% repetitive element content, while the smaller B. plicatilis genomes contain between 14 and 25% repetitive elements. According to our analyses, the B. calyciflorus genome contains 39% repetitive elements, which is substantially higher than previously reported (21%), and suggests that high repetitive element load could be widespread in monogonont rotifers. CONCLUSIONS Even though the genome sizes of these species are at the low end of the metazoan spectrum, their genomes contain substantial amounts of repetitive elements. Polyploidy does not appear to play a role in genome size variations in these species, and these variations can be mostly explained by changes in repetitive element content. This contradicts the naïve expectation that small genomes are streamlined, or less complex, and that large variations in nuclear DNA content between closely related species are due to polyploidy.
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Affiliation(s)
- J. Blommaert
- Research Department for Limnology, University of Innsbruck, Mondsee, Austria
| | - S. Riss
- Research Department for Limnology, University of Innsbruck, Mondsee, Austria
| | - B. Hecox-Lea
- Josephine Bay Paul Center for Comparative Molecular Biology and Evolution, Marine Biological Laboratory, Woods Hole, MA USA
| | - D. B. Mark Welch
- Josephine Bay Paul Center for Comparative Molecular Biology and Evolution, Marine Biological Laboratory, Woods Hole, MA USA
| | - C. P. Stelzer
- Research Department for Limnology, University of Innsbruck, Mondsee, Austria
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32
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Malmberg MM, Barbulescu DM, Drayton MC, Shinozuka M, Thakur P, Ogaji YO, Spangenberg GC, Daetwyler HD, Cogan NOI. Evaluation and Recommendations for Routine Genotyping Using Skim Whole Genome Re-sequencing in Canola. FRONTIERS IN PLANT SCIENCE 2018; 9:1809. [PMID: 30581450 PMCID: PMC6292936 DOI: 10.3389/fpls.2018.01809] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/09/2018] [Accepted: 11/21/2018] [Indexed: 05/25/2023]
Abstract
Whole genome sequencing offers genome wide, unbiased markers, and inexpensive library preparation. With the cost of sequencing decreasing rapidly, many plant genomes of modest size are amenable to skim whole genome resequencing (skim WGR). The use of skim WGR in diverse sample sets without the use of imputation was evaluated in silico in 149 canola samples representative of global diversity. Fastq files with an average of 10x coverage of the reference genome were used to generate skim samples representing 0.25x, 0.5x, 1x, 2x, 3x, 4x, and 5x sequencing coverage. Applying a pre-defined list of SNPs versus de novo SNP discovery was evaluated. As skim WGR is expected to result in some degree of insufficient allele sampling, all skim coverage levels were filtered at a range of minimum read depths from a relaxed minimum read depth of 2 to a stringent read depth of 5, resulting in 28 list-based SNP sets. As a broad recommendation, genotyping pre-defined SNPs between 1x and 2x coverage with relatively stringent depth filtering is appropriate for a diverse sample set of canola due to a balance between marker number, sufficient accuracy, and sequencing cost, but depends on the intended application. This was experimentally examined in two sample sets with different genetic backgrounds: 1x coverage of 1,590 individuals from 84 Australian spring type four-parent crosses aimed at maximizing diversity as well as one commercial F1 hybrid, and 2x coverage of 379 doubled haploids (DHs) derived from a subset of the four-parent crosses. To determine optimal coverage in a simpler genetic background, the DH sample sequence coverage was further down sampled in silico. The flexible and cost-effective nature of the protocol makes it highly applicable across a range of species and purposes.
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Affiliation(s)
- M. Michelle Malmberg
- Agriculture Victoria, AgriBio, Centre for AgriBioscience, Bundoora, VIC, Australia
- School of Applied Systems Biology, La Trobe University, Bundoora, VIC, Australia
| | | | - Michelle C. Drayton
- Agriculture Victoria, AgriBio, Centre for AgriBioscience, Bundoora, VIC, Australia
| | - Maiko Shinozuka
- Agriculture Victoria, AgriBio, Centre for AgriBioscience, Bundoora, VIC, Australia
| | - Preeti Thakur
- Agriculture Victoria, AgriBio, Centre for AgriBioscience, Bundoora, VIC, Australia
| | - Yvonne O. Ogaji
- Agriculture Victoria, AgriBio, Centre for AgriBioscience, Bundoora, VIC, Australia
| | - German C. Spangenberg
- Agriculture Victoria, AgriBio, Centre for AgriBioscience, Bundoora, VIC, Australia
- School of Applied Systems Biology, La Trobe University, Bundoora, VIC, Australia
| | - Hans D. Daetwyler
- Agriculture Victoria, AgriBio, Centre for AgriBioscience, Bundoora, VIC, Australia
- School of Applied Systems Biology, La Trobe University, Bundoora, VIC, Australia
| | - Noel O. I. Cogan
- Agriculture Victoria, AgriBio, Centre for AgriBioscience, Bundoora, VIC, Australia
- School of Applied Systems Biology, La Trobe University, Bundoora, VIC, Australia
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33
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Polyploid polynuclear consecutive cell-cycle enables large genome-size in Haematococcus pluvialis. ALGAL RES 2018. [DOI: 10.1016/j.algal.2018.06.013] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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34
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Buckley RM, Kortschak RD, Adelson DL. Divergent genome evolution caused by regional variation in DNA gain and loss between human and mouse. PLoS Comput Biol 2018; 14:e1006091. [PMID: 29677183 PMCID: PMC5931693 DOI: 10.1371/journal.pcbi.1006091] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/06/2017] [Revised: 05/02/2018] [Accepted: 03/15/2018] [Indexed: 12/31/2022] Open
Abstract
The forces driving the accumulation and removal of non-coding DNA and ultimately the evolution of genome size in complex organisms are intimately linked to genome structure and organisation. Our analysis provides a novel method for capturing the regional variation of lineage-specific DNA gain and loss events in their respective genomic contexts. To further understand this connection we used comparative genomics to identify genome-wide individual DNA gain and loss events in the human and mouse genomes. Focusing on the distribution of DNA gains and losses, relationships to important structural features and potential impact on biological processes, we found that in autosomes, DNA gains and losses both followed separate lineage-specific accumulation patterns. However, in both species chromosome X was particularly enriched for DNA gain, consistent with its high L1 retrotransposon content required for X inactivation. We found that DNA loss was associated with gene-rich open chromatin regions and DNA gain events with gene-poor closed chromatin regions. Additionally, we found that DNA loss events tended to be smaller than DNA gain events suggesting that they were able to accumulate in gene-rich open chromatin regions due to their reduced capacity to interrupt gene regulatory architecture. GO term enrichment showed that mouse loss hotspots were strongly enriched for terms related to developmental processes. However, these genes were also located in regions with a high density of conserved elements, suggesting that despite high levels of DNA loss, gene regulatory architecture remained conserved. This is consistent with a model in which DNA gain and loss results in turnover or "churning" in regulatory element dense regions of open chromatin, where interruption of regulatory elements is selected against.
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Affiliation(s)
- Reuben M. Buckley
- Department of Genetics and Evolution, The University of Adelaide, North Tce, Adelaide, Australia
| | - R. Daniel Kortschak
- Department of Genetics and Evolution, The University of Adelaide, North Tce, Adelaide, Australia
| | - David L. Adelson
- Department of Genetics and Evolution, The University of Adelaide, North Tce, Adelaide, Australia
- * E-mail:
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Malmberg MM, Pembleton LW, Baillie RC, Drayton MC, Sudheesh S, Kaur S, Shinozuka H, Verma P, Spangenberg GC, Daetwyler HD, Forster JW, Cogan NO. Genotyping-by-sequencing through transcriptomics: implementation in a range of crop species with varying reproductive habits and ploidy levels. PLANT BIOTECHNOLOGY JOURNAL 2018; 16:877-889. [PMID: 28913899 PMCID: PMC5866951 DOI: 10.1111/pbi.12835] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/29/2017] [Revised: 08/03/2017] [Accepted: 09/08/2017] [Indexed: 05/09/2023]
Abstract
The application of genomics in crops has the ability to significantly improve genetic gain for agriculture. Many marker-dense tools have been developed, but few have seen broad adoption in plant genomics due to issues of significant variations of genome size, levels of ploidy, single nucleotide polymorphism (SNP) frequency and reproductive habit. When combined with limited breeding activities, small research communities and scant sequence resources, the suitability of popular systems is often suboptimal and routinely fails to effectively balance cost-effectiveness and sample throughput. Genotyping-by-sequencing (GBS) encompasses a range of protocols including resequencing of the transcriptome. This study describes a skim GBS-transcriptomics (GBS-t) approach developed to be broadly applicable, cost-effective and high-throughput while still assaying a significant number of SNP loci. A range of crop species with differing levels of ploidy and degree of inbreeding/outbreeding were chosen, including perennial ryegrass, a diploid outbreeding forage grass; phalaris, a putative segmental allotetraploid outbreeding forage grass; lentil, a diploid inbreeding grain legume; and canola, an allotetraploid partially outbreeding oilseed. GBS-t was validated as a simple and largely automated, cost-effective method which generates sufficient SNPs (from 89 738 to 231 977) with acceptable levels of missing data and even genome coverage from c. 3 million sequence reads per sample. GBS-t is therefore a broadly applicable system suitable for many crops, offering advantages over other systems. The correct choice of subsequent sequence analysis software is important, and the bioinformatics process should be iterative and tailored to the specific challenges posed by ploidy variation and extent of heterozygosity.
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Affiliation(s)
- M. Michelle Malmberg
- Agriculture VictoriaAgriBioCentre for AgriBioscience5 Ring RoadBundooraVictoria 3083Australia
- School of Applied Systems BiologyLa Trobe UniversityBundooraVictoria 3086Australia
| | - Luke W. Pembleton
- Agriculture VictoriaAgriBioCentre for AgriBioscience5 Ring RoadBundooraVictoria 3083Australia
| | - Rebecca C. Baillie
- Agriculture VictoriaAgriBioCentre for AgriBioscience5 Ring RoadBundooraVictoria 3083Australia
| | - Michelle C. Drayton
- Agriculture VictoriaAgriBioCentre for AgriBioscience5 Ring RoadBundooraVictoria 3083Australia
| | - Shimna Sudheesh
- Agriculture VictoriaAgriBioCentre for AgriBioscience5 Ring RoadBundooraVictoria 3083Australia
| | - Sukhjiwan Kaur
- Agriculture VictoriaAgriBioCentre for AgriBioscience5 Ring RoadBundooraVictoria 3083Australia
| | - Hiroshi Shinozuka
- Agriculture VictoriaAgriBioCentre for AgriBioscience5 Ring RoadBundooraVictoria 3083Australia
| | - Preeti Verma
- Agriculture VictoriaAgriBioCentre for AgriBioscience5 Ring RoadBundooraVictoria 3083Australia
| | - German C. Spangenberg
- Agriculture VictoriaAgriBioCentre for AgriBioscience5 Ring RoadBundooraVictoria 3083Australia
- School of Applied Systems BiologyLa Trobe UniversityBundooraVictoria 3086Australia
| | - Hans D. Daetwyler
- Agriculture VictoriaAgriBioCentre for AgriBioscience5 Ring RoadBundooraVictoria 3083Australia
- School of Applied Systems BiologyLa Trobe UniversityBundooraVictoria 3086Australia
| | - John W. Forster
- Agriculture VictoriaAgriBioCentre for AgriBioscience5 Ring RoadBundooraVictoria 3083Australia
- School of Applied Systems BiologyLa Trobe UniversityBundooraVictoria 3086Australia
| | - Noel O.I. Cogan
- Agriculture VictoriaAgriBioCentre for AgriBioscience5 Ring RoadBundooraVictoria 3083Australia
- School of Applied Systems BiologyLa Trobe UniversityBundooraVictoria 3086Australia
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Yuan Y, Lee H, Hu H, Scheben A, Edwards D. Single-Cell Genomic Analysis in Plants. Genes (Basel) 2018; 9:genes9010050. [PMID: 29361790 PMCID: PMC5793201 DOI: 10.3390/genes9010050] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/13/2017] [Revised: 01/05/2018] [Accepted: 01/10/2018] [Indexed: 12/26/2022] Open
Abstract
Individual cells in an organism are variable, which strongly impacts cellular processes. Advances in sequencing technologies have enabled single-cell genomic analysis to become widespread, addressing shortcomings of analyses conducted on populations of bulk cells. While the field of single-cell plant genomics is in its infancy, there is great potential to gain insights into cell lineage and functional cell types to help understand complex cellular interactions in plants. In this review, we discuss current approaches for single-cell plant genomic analysis, with a focus on single-cell isolation, DNA amplification, next-generation sequencing, and bioinformatics analysis. We outline the technical challenges of analysing material from a single plant cell, and then examine applications of single-cell genomics and the integration of this approach with genome editing. Finally, we indicate future directions we expect in the rapidly developing field of plant single-cell genomic analysis.
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Affiliation(s)
- Yuxuan Yuan
- School of Biological Sciences and Institute of Agriculture, The University of Western Australia, Perth, WA 6009, Australia.
| | - HueyTyng Lee
- School of Biological Sciences and Institute of Agriculture, The University of Western Australia, Perth, WA 6009, Australia.
- School of Agriculture and Food Science, The University of Queensland, Brisbane, QLD 4072, Australia.
| | - Haifei Hu
- School of Biological Sciences and Institute of Agriculture, The University of Western Australia, Perth, WA 6009, Australia.
| | - Armin Scheben
- School of Biological Sciences and Institute of Agriculture, The University of Western Australia, Perth, WA 6009, Australia.
| | - David Edwards
- School of Biological Sciences and Institute of Agriculture, The University of Western Australia, Perth, WA 6009, Australia.
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Silva AA, Braga LS, Corrêa AS, Holmes VR, Johnston JS, Oppert B, Guedes RNC, Tavares MG. Comparative cytogenetics and derived phylogenic relationship among Sitophilus grain weevils (Coleoptera, Curculionidae, Dryophthorinae). COMPARATIVE CYTOGENETICS 2018; 12:223-245. [PMID: 29997743 PMCID: PMC6037651 DOI: 10.3897/compcytogen.v12i2.26412] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/03/2018] [Accepted: 06/13/2018] [Indexed: 05/04/2023]
Abstract
Cytogenetic characteristics and genome size are powerful tools for species characterization and identification of cryptic species, providing critical insights into phylogenetic and evolutionary relationships. Sitophilus Linnaeus, 1758 grain weevils can benefit from such tools as key pest species of stored products and also as sources of archeological information on human history and past urban environments. Moreover, the phylogenetic relationship among these weevil species remains controversial and is largely based on single DNA fragment analyses. Therefore, cytogenetic analyses and genome size determinations were performed for four Sitophilus grain weevil species, namely the granary weevil Sitophilus granarius (Linnaeus, 1758), the tamarind weevil S. linearis (Herbst, 1797), the rice weevil S. oryzae (Linnaeus, 1763), and the maize weevil S. zeamais Motschulsky, 1855. Both maize and rice weevils exhibited the same chromosome number (2n=22; 10 A + Xyp). In contrast, the granary and tamarind weevils exhibited higher chromosome number (2n=24; 11 A + Xyp and 11 A + neo-XY, respectively). The nuclear DNA content of these species was not proportionally related to either chromosome number or heterochromatin amount. Maize and rice weevils exhibited similar and larger genome sizes (0.730±0.003 pg and 0.786±0.003 pg, respectively), followed by the granary weevil (0.553±0.003 pg), and the tamarind weevil (0.440±0.001 pg). Parsimony phylogenetic analysis of the insect karyotypes indicate that S. zeamais and S. oryzae were phylogenetically closer than S. granarius and S. linearis, which were more closely related and share a more recent ancestral relationship.
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Affiliation(s)
- Alexandra Avelar Silva
- Departamento de Biologia Geral, Universidade Federal de Viçosa, Viçosa, MG 36570-900, Brazil
| | - Lucas Soares Braga
- Departamento de Entomologia, Universidade Federal de Viçosa, Viçosa, MG 36570-900, Brazil
| | - Alberto Soares Corrêa
- Departamento de Entomologia e Acarologia, Escola Superior de Agricultura “Luiz de Queiroz", Universidade de São Paulo, Piracicaba, SP 13418-900, Brazil
| | | | | | - Brenda Oppert
- USDA-ARS, Center for Grain and Animal Health Research, Manhattan, KS 66506, USA
| | | | - Mara Garcia Tavares
- Departamento de Biologia Geral, Universidade Federal de Viçosa, Viçosa, MG 36570-900, Brazil
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Liu GC, Dong ZW, He JW, Zhao RP, Wang W, Li XY. Genome size of 14 species of fireflies (Insecta, Coleoptera, Lampyridae). Zool Res 2017; 38:449-458. [PMID: 29280364 PMCID: PMC5767557 DOI: 10.24272/j.issn.2095-8137.2017.078] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2017] [Accepted: 11/01/2017] [Indexed: 12/19/2022] Open
Abstract
Eukaryotic genome size data are important both as the basis for comparative research into genome evolution and as estimators of the cost and difficulty of genome sequencing programs for non-model organisms. In this study, the genome size of 14 species of fireflies (Lampyridae) (two genera in Lampyrinae, three genera in Luciolinae, and one genus in subfamily incertae sedis) were estimated by propidium iodide (PI)-based flow cytometry. The haploid genome sizes of Lampyridae ranged from 0. 42 to 1. 31 pg, a 3. 1-fold span. Genome sizes of the fireflies varied within the tested subfamilies and genera. Lamprigera and Pyrocoelia species had large and small genome sizes, respectively. No correlation was found between genome size and morphological traits such as body length, body width, eye width, and antennal length. Our data provide additional information on genome size estimation of the firefly family Lampyridae. Furthermore, this study will help clarify the cost and difficulty of genome sequencing programs for non-model organisms and will help promote studies on firefly genome evolution.
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Affiliation(s)
- Gui-Chun Liu
- State Key Laboratory of Genetic Resources and Evolution, Kunming Institute of Zoology, Chinese Academy of Sciences, Kunming Yunnan 650223, China
- Center for Ecological and Environmental Sciences, Key Laboratory for Space Bioscience & Biotechnology, Northwestern Polytechnical University, Xi'an Shaanxi 710072, China
| | - Zhi-Wei Dong
- State Key Laboratory of Genetic Resources and Evolution, Kunming Institute of Zoology, Chinese Academy of Sciences, Kunming Yunnan 650223, China
| | - Jin-Wu He
- State Key Laboratory of Genetic Resources and Evolution, Kunming Institute of Zoology, Chinese Academy of Sciences, Kunming Yunnan 650223, China
- University of Chinese Academy of Sciences, Beijing 100049, China
| | - Ruo-Ping Zhao
- State Key Laboratory of Genetic Resources and Evolution, Kunming Institute of Zoology, Chinese Academy of Sciences, Kunming Yunnan 650223, China
| | - Wen Wang
- State Key Laboratory of Genetic Resources and Evolution, Kunming Institute of Zoology, Chinese Academy of Sciences, Kunming Yunnan 650223, China
- Center for Ecological and Environmental Sciences, Key Laboratory for Space Bioscience & Biotechnology, Northwestern Polytechnical University, Xi'an Shaanxi 710072, China
| | - Xue-Yan Li
- State Key Laboratory of Genetic Resources and Evolution, Kunming Institute of Zoology, Chinese Academy of Sciences, Kunming Yunnan 650223, China.
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Hjelmen CE, Johnston JS. The mode and tempo of genome size evolution in the subgenus Sophophora. PLoS One 2017; 12:e0173505. [PMID: 28267812 PMCID: PMC5340367 DOI: 10.1371/journal.pone.0173505] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/09/2016] [Accepted: 02/21/2017] [Indexed: 01/05/2023] Open
Abstract
Genome size varies widely across organisms, with no apparent tie to organismal complexity. While genome size is inherited, there is no established evolutionary model for this trait. Hypotheses have been postulated for the observed variation in genome sizes across species, most notably the effective population size hypothesis, the mutational equilibrium hypothesis, and the adaptive hypothesis. While much data has been collected on genome size, the above hypotheses have largely ignored impacts from phylogenetic relationships. In order to test these competing hypotheses, genome sizes of 87 Sophophora species were analyzed in a comparative phylogenetic approach using Pagel’s parameters of evolution, Blomberg’s K, Abouheif’s Cmean and Moran’s I. In addition to testing the mode and rate of genome size evolution in Sophophora species, the effect of number of taxa on detection of phylogenetic signal was analyzed for each of these comparative phylogenetic methods. Sophophora genome size was found to be dependent on the phylogeny, indicating that evolutionary time was important for predicting the variation among species. Genome size was found to evolve gradually on branches of the tree, with a rapid burst of change early in the phylogeny. These results suggest that Sophophora genome size has experienced gradual changes, which support the largely theoretical mutational equilibrium hypothesis. While some methods (Abouheif’s Cmean and Moran’s I) were found to be affected by increasing taxa numbers, more commonly used methods (λ and Blomberg’s K) were found to have increasing reliability with increasing taxa number, with significantly more support with fifteen or more taxa. Our results suggest that these comparative phylogenetic methods, with adequate taxon sampling, can be a powerful way to uncover the enigma that is genome size variation through incorporation of phylogenetic relationships.
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Affiliation(s)
- Carl E. Hjelmen
- Department of Entomology, Texas A&M University, College Station, Texas, United States of America
- * E-mail:
| | - J. Spencer Johnston
- Department of Entomology, Texas A&M University, College Station, Texas, United States of America
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40
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Genome size, cytogenetic data and transferability of EST-SSRs markers in wild and cultivated species of the genus Theobroma L. (Byttnerioideae, Malvaceae). PLoS One 2017; 12:e0170799. [PMID: 28187131 PMCID: PMC5302445 DOI: 10.1371/journal.pone.0170799] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/11/2016] [Accepted: 01/11/2017] [Indexed: 11/19/2022] Open
Abstract
The genus Theobroma comprises several trees species native to the Amazon. Theobroma cacao L. plays a key economic role mainly in the chocolate industry. Both cultivated and wild forms are described within the genus. Variations in genome size and chromosome number have been used for prediction purposes including the frequency of interspecific hybridization or inference about evolutionary relationships. In this study, the nuclear DNA content, karyotype and genetic diversity using functional microsatellites (EST-SSR) of seven Theobroma species were characterized. The nuclear content of DNA for all analyzed Theobroma species was 1C = ~ 0.46 pg. These species presented 2n = 20 with small chromosomes and only one pair of terminal heterochromatic bands positively stained (CMA+/DAPI− bands). The small size of Theobroma ssp. genomes was equivalent to other Byttnerioideae species, suggesting that the basal lineage of Malvaceae have smaller genomes and that there was an expansion of 2C values in the more specialized family clades. A set of 20 EST-SSR primers were characterized for related species of Theobroma, in which 12 loci were polymorphic. The polymorphism information content (PIC) ranged from 0.23 to 0.65, indicating a high level of information per locus. Combined results of flow cytometry, cytogenetic data and EST-SSRs markers will contribute to better describe the species and infer about the evolutionary relationships among Theobroma species. In addition, the importance of a core collection for conservation purposes is highlighted.
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He K, Lin K, Wang G, Li F. Genome Sizes of Nine Insect Species Determined by Flow Cytometry and k-mer Analysis. Front Physiol 2016; 7:569. [PMID: 27932995 PMCID: PMC5121235 DOI: 10.3389/fphys.2016.00569] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/04/2016] [Accepted: 11/08/2016] [Indexed: 11/13/2022] Open
Abstract
The flow cytometry method was used to estimate the genome sizes of nine agriculturally important insects, including two coleopterans, five Hemipterans, and two hymenopterans. Among which, the coleopteran Lissorhoptrus oryzophilus (Kuschel) had the largest genome of 981 Mb. The average genome size was 504 Mb, suggesting that insects have a moderate-size genome. Compared with the insects in other orders, hymenopterans had small genomes, which were averagely about ~200 Mb. We found that the genome sizes of four insect species were different between male and female, showing the organismal complexity of insects. The largest difference occurred in the coconut leaf beetle Brontispa longissima (Gestro). The male coconut leaf beetle had a 111 Mb larger genome than females, which might be due to the chromosome number difference between the sexes. The results indicated that insect invasiveness was not related to genome size. We also determined the genome sizes of the small brown planthopper Laodelphax striatellus (Fallén) and the parasitic wasp Macrocentrus cingulum (Brischke) using k-mer analysis with Illunima Solexa sequencing data. There were slight differences in the results from the two methods. k-mer analysis indicated that the genome size of L. striatellus was 500–700 Mb and that of M. cingulum was ~150 Mb. In all, the genome sizes information presented here should be helpful for designing the genome sequencing strategy when necessary.
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Affiliation(s)
- Kang He
- Department of Entomology, College of Plant Protection, Nanjing Agricultural University Nanjing, China
| | - Kejian Lin
- State Key Laboratory for Biology of Plant Diseases and Insect Pests, Institute of Plant Protection, Chinese Academy of Agricultural Sciences Beijing, China
| | - Guirong Wang
- State Key Laboratory for Biology of Plant Diseases and Insect Pests, Institute of Plant Protection, Chinese Academy of Agricultural Sciences Beijing, China
| | - Fei Li
- Department of Entomology, College of Plant Protection, Nanjing Agricultural UniversityNanjing, China; Ministry of Agriculture, Key Lab of Agricultural Entomology and Institute of Insect Sciences, Zhejiang UniversityHangzhou, China
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Bybee S, Córdoba-Aguilar A, Duryea MC, Futahashi R, Hansson B, Lorenzo-Carballa MO, Schilder R, Stoks R, Suvorov A, Svensson EI, Swaegers J, Takahashi Y, Watts PC, Wellenreuther M. Odonata (dragonflies and damselflies) as a bridge between ecology and evolutionary genomics. Front Zool 2016; 13:46. [PMID: 27766110 PMCID: PMC5057408 DOI: 10.1186/s12983-016-0176-7] [Citation(s) in RCA: 60] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/02/2016] [Accepted: 09/16/2016] [Indexed: 12/21/2022] Open
Abstract
Odonata (dragonflies and damselflies) present an unparalleled insect model to integrate evolutionary genomics with ecology for the study of insect evolution. Key features of Odonata include their ancient phylogenetic position, extensive phenotypic and ecological diversity, several unique evolutionary innovations, ease of study in the wild and usefulness as bioindicators for freshwater ecosystems worldwide. In this review, we synthesize studies on the evolution, ecology and physiology of odonates, highlighting those areas where the integration of ecology with genomics would yield significant insights into the evolutionary processes that would not be gained easily by working on other animal groups. We argue that the unique features of this group combined with their complex life cycle, flight behaviour, diversity in ecological niches and their sensitivity to anthropogenic change make odonates a promising and fruitful taxon for genomics focused research. Future areas of research that deserve increased attention are also briefly outlined.
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Affiliation(s)
- Seth Bybee
- Brigham Young University, Provo, UT 84606 USA
| | - Alex Córdoba-Aguilar
- Departmento de Ecología Evolutiva, Instituto de Ecología, Universidad Nacional Autónoma de México, Apdo, Postal 70-275, Ciudad Universitaria, 04510 Mexico City, Mexico
| | - M. Catherine Duryea
- Evolutionary Ecology Unit, Department of Biology, Lund University, 223 62 Lund, Sweden
| | - Ryo Futahashi
- Bioproduction Research Institute, National Institute of Advanced Industrial Science and Technology, Central 6, Tsukuba, Ibaraki 305-8566 Japan
| | - Bengt Hansson
- Evolutionary Ecology Unit, Department of Biology, Lund University, 223 62 Lund, Sweden
| | - M. Olalla Lorenzo-Carballa
- Institute of Integrative Biology, Biosciences Building, University of Liverpool, Crown Street, Liverpool, L69 7ZB UK
| | - Ruud Schilder
- Departments of Entomology and Biology, Pennsylvania State University, University Park, PA 16802 USA
| | - Robby Stoks
- Laboratory of Aquatic Ecology, Evolution and Conservation, Department of Biology, University of Leuven, 3000 Leuven, Belgium
| | - Anton Suvorov
- Department of Biology, Brigham Young University, LSB 4102, Provo, UT 84602 USA
| | - Erik I. Svensson
- Evolutionary Ecology Unit, Department of Biology, Lund University, 223 62 Lund, Sweden
| | - Janne Swaegers
- Laboratory of Aquatic Ecology, Evolution and Conservation, Department of Biology, University of Leuven, 3000 Leuven, Belgium
| | - Yuma Takahashi
- Division of Ecology and Evolutionary Biology, Graduate School of Life Sciences, Tohoku University, 6-3, Aoba, Aramaki, Aoba, Sendai, Miyagi 980-8578 Japan
| | | | - Maren Wellenreuther
- Evolutionary Ecology Unit, Department of Biology, Lund University, 223 62 Lund, Sweden
- Plant and Food Research Limited, Nelson, 7010 New Zealand
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Nuclear DNA content in Miscanthus sp. and the geographical variation pattern in Miscanthus lutarioriparius. Sci Rep 2016; 6:34342. [PMID: 27698438 PMCID: PMC5048105 DOI: 10.1038/srep34342] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/25/2016] [Accepted: 09/05/2016] [Indexed: 11/08/2022] Open
Abstract
The genome sizes of five Miscanthus species, including 79 accessions of M. lutarioriparius, 8 of M. floridulus, 6 of M. sacchariflorus, 7 of M. sinensis, and 4 of M. × giganteus were examined using flow cytometry. The overall average nuclear DNA content were 4.256 ± 0.6 pg/2C in M. lutarioriparius, 5.175 ± 0.3 pg/2C in M. floridulus, 3.956 ± 0.2 pg/2C in M. sacchariflorus, 5.272 ± 0.2 pg/2C in M. sinensis, and 6.932 ± 0.1 pg/2C in M. × giganteus. Interspecific variation was found at the diploid level, suggesting that DNA content might be a parameter that can be used to differentiate the species. Tetraploid populations were found in M. lutarioriparius, M. sacchariflorus, and M. sinensis, and their DNA content were 8.34 ± 1.2, 8.52, and 8.355 pg, respectively. The association between the DNA content of M. lutarioriparius, collected from representative ranges across the Yangtze River, and its geographic distribution was statistically analyzed. A consistent pattern of DNA content variation in 79 M. lutarioriparius accessions across its entire geographic range was found in this study. Along the Yangtze River, the DNA content of M. lutarioriparius tended to increase from the upstream to the downstream areas, and almost all tetraploids gathered in the upstream area extended to coastal regions.
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Santos FC, Guyot R, do Valle CB, Chiari L, Techio VH, Heslop-Harrison P, Vanzela ALL. Chromosomal distribution and evolution of abundant retrotransposons in plants: gypsy elements in diploid and polyploid Brachiaria forage grasses. Chromosome Res 2016; 23:571-82. [PMID: 26386563 DOI: 10.1007/s10577-015-9492-6] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
Abstract
Like other eukaryotes, the nuclear genome of plants consists of DNA with a small proportion of low-copy DNA (genes and regulatory sequences) and very abundant DNA sequence motifs that are repeated thousands up to millions of times in the genomes including transposable elements (TEs) and satellite DNA. Retrotransposons, one class of TEs, are sequences that amplify via an RNA intermediate and reinsert into the genome, are often the major fraction of a genome. Here, we put research on retrotransposons into the larger context of plant repetitive DNA and genome behaviour, showing features of genome evolution in a grass genus, Brachiaria, in relation to other plant species. We show the contrasting amplification of different retroelement fractions across the genome with characteristics for various families and domains. The genus Brachiaria includes both diploid and polyploid species, with similar chromosome types and chromosome basic numbers x = 6, 7, 8 and 9. The polyploids reproduce asexually and are apomictic, but there are also sexual species. Cytogenetic studies and flow cytometry indicate a large variation in DNA content (C-value), chromosome sizes and genome organization. In order to evaluate the role of transposable elements in the genome and karyotype organization of species of Brachiaria, we searched for sequences similar to conserved regions of TEs in RNAseq reads library produced in Brachiaria decumbens. Of the 9649 TE-like contigs, 4454 corresponded to LTR-retrotransposons, and of these, 79.5 % were similar to members of the gypsy superfamily. Sequences of conserved protein domains of gypsy were used to design primers for producing the probes. The probes were used in FISH against chromosomes of accesses of B. decumbens, Brachiaria brizantha, Brachiaria ruziziensis and Brachiaria humidicola. Probes showed hybridization signals predominantly in proximal regions, especially those for retrotransposons of the clades CRM and Athila, while elements of Del and Tat exhibited dispersed signals, in addition to those proximal signals. These results show that the proximal region of Brachiaria chromosomes is a hotspot for retrotransposon insertion, particularly for the gypsy family. The combination of high-throughput sequencing and a chromosome-centric cytogenetic approach allows the abundance, organization and nature of transposable elements to be characterized in unprecedented detail. By their amplification and dispersal, retrotransposons can affect gene expression; they can lead to rapid diversification of chromosomes between species and, hence, are useful for studies of genome evolution and speciation in the Brachiaria genus. Centromeric regions can be identified and mapped, and retrotransposon markers can also assisting breeders in the developing and exploiting interspecific hybrids.
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Affiliation(s)
- Fabíola Carvalho Santos
- Department of General Biology, Center of Biological Sciences, State University of Londrina, Londrina, 86057-970, Paraná State, Brazil
| | - Romain Guyot
- Institut de Recherche pour le Développement (IRD), UMR IPME, BP 64501, 34394, Montpellier Cedex, France
| | | | - Lucimara Chiari
- Embrapa Gado de Corte, 79106-550, Campo Grande, Mato Grosso do Sul State, Brazil
| | - Vânia Helena Techio
- Department of Biology, Federal University of Lavras, 37200-000, Lavras, Minas Gerais State, Brazil
| | | | - André Luís Laforga Vanzela
- Department of General Biology, Center of Biological Sciences, State University of Londrina, Londrina, 86057-970, Paraná State, Brazil.
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Arnqvist G, Sayadi A, Immonen E, Hotzy C, Rankin D, Tuda M, Hjelmen CE, Johnston JS. Genome size correlates with reproductive fitness in seed beetles. Proc Biol Sci 2016; 282:rspb.2015.1421. [PMID: 26354938 DOI: 10.1098/rspb.2015.1421] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
The ultimate cause of genome size (GS) evolution in eukaryotes remains a major and unresolved puzzle in evolutionary biology. Large-scale comparative studies have failed to find consistent correlations between GS and organismal properties, resulting in the 'C-value paradox'. Current hypotheses for the evolution of GS are based either on the balance between mutational events and drift or on natural selection acting upon standing genetic variation in GS. It is, however, currently very difficult to evaluate the role of selection because within-species studies that relate variation in life-history traits to variation in GS are very rare. Here, we report phylogenetic comparative analyses of GS evolution in seed beetles at two distinct taxonomic scales, which combines replicated estimation of GS with experimental assays of life-history traits and reproductive fitness. GS showed rapid and bidirectional evolution across species, but did not show correlated evolution with any of several indices of the relative importance of genetic drift. Within a single species, GS varied by 4-5% across populations and showed positive correlated evolution with independent estimates of male and female reproductive fitness. Collectively, the phylogenetic pattern of GS diversification across and within species in conjunction with the pattern of correlated evolution between GS and fitness provide novel support for the tenet that natural selection plays a key role in shaping GS evolution.
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Affiliation(s)
- Göran Arnqvist
- Animal Ecology, Department of Ecology and Genetics, Uppsala University, Norbyvägen 18D, Uppsala 75236, Sweden
| | - Ahmed Sayadi
- Animal Ecology, Department of Ecology and Genetics, Uppsala University, Norbyvägen 18D, Uppsala 75236, Sweden
| | - Elina Immonen
- Animal Ecology, Department of Ecology and Genetics, Uppsala University, Norbyvägen 18D, Uppsala 75236, Sweden
| | - Cosima Hotzy
- Evolutionary Biology, Department of Ecology and Genetics, Uppsala University, Norbyvägen 18D, Uppsala 75236, Sweden
| | - Daniel Rankin
- Institute of Evolutionary Biology and Environmental Studies, University of Zürich, Zürich, Switzerland
| | - Midori Tuda
- Laboratory of Insect Natural Enemies, Department of Bioresource Sciences, Kyushu University, Fukuoka 812-8581, Japan Institute of Biological Control, Faculty of Agriculture, Kyushu University, Fukuoka 812-8581, Japan
| | - Carl E Hjelmen
- Department of Entomology, Texas A&M University, College Station, TX 77843 2475, USA
| | - J Spencer Johnston
- Department of Entomology, Texas A&M University, College Station, TX 77843 2475, USA
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46
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Fantini L, Jeffery NW, Pierossi P, Gregory TR, Nieves M. Qualitative and quantitative analysis of the genomes and chromosomes of spider monkeys (Primates: Atelidae). Biol J Linn Soc Lond 2016. [DOI: 10.1111/bij.12775] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Lucía Fantini
- Grupo de Investigación en Biología Evolutiva; Departamento de Ecología, Genética y Evolución; Facultad de Ciencias Exactas y Naturales; Universidad de Buenos Aires, IEGEBA (CONICET-UBA), Ciudad Universitaria; Buenos Aires Argentina
| | - Nicholas W. Jeffery
- Department of Integrative Biology; University of Guelph; Guelph ON N1G 2W1 Canada
| | - Paola Pierossi
- Department of Integrative Biology; University of Guelph; Guelph ON N1G 2W1 Canada
| | - T. Ryan Gregory
- Department of Integrative Biology; University of Guelph; Guelph ON N1G 2W1 Canada
| | - Mariela Nieves
- Grupo de Investigación en Biología Evolutiva; Departamento de Ecología, Genética y Evolución; Facultad de Ciencias Exactas y Naturales; Universidad de Buenos Aires, IEGEBA (CONICET-UBA), Ciudad Universitaria; Buenos Aires Argentina
- Consejo Nacional de Investigaciones Científicas y Técnicas CONICET; Buenos Aires Argentina
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47
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Rodriguez-Granados NY, Ramirez-Prado JS, Veluchamy A, Latrasse D, Raynaud C, Crespi M, Ariel F, Benhamed M. Put your 3D glasses on: plant chromatin is on show. JOURNAL OF EXPERIMENTAL BOTANY 2016; 67:3205-21. [PMID: 27129951 DOI: 10.1093/jxb/erw168] [Citation(s) in RCA: 47] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/07/2023]
Abstract
The three-dimensional organization of the eukaryotic nucleus and its chromosomal conformation have emerged as important features in the complex network of mechanisms behind gene activity and genome connectivity dynamics, which can be evidenced in the regionalized chromosomal spatial distribution and the clustering of diverse genomic regions with similar expression patterns. The development of chromatin conformation capture (3C) techniques has permitted the elucidation of commonalities between the eukaryotic phyla, as well as important differences among them. The growing number of studies in the field performed in plants has shed light on the structural and regulatory features of these organisms. For instance, it has been proposed that plant chromatin can be arranged into different conformations such as Rabl, Rosette-like, and Bouquet, and that both short- and long-range chromatin interactions occur in Arabidopsis. In this review, we compile the current knowledge about chromosome architecture characteristics in plants, as well as the molecular events and elements (including long non-coding RNAs, histone and DNA modifications, chromatin remodeling complexes, and transcription factors) shaping the genome three-dimensional conformation. Furthermore, we discuss the developmental outputs of genome topology-mediated gene expression regulation. It is becoming increasingly clear that new tools and techniques with higher resolution need to be developed and implemented in Arabidopsis and other model plants in order to better understand chromosome architecture dynamics, from an integrative perspective with other fields of plant biology such as development, stress biology, and finally agriculture.
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Affiliation(s)
- Natalia Y Rodriguez-Granados
- Division of Biological and Environmental Sciences and Engineering, King Abdullah University of Science and Technology, Thuwal 23955-6900, Kingdom of Saudi Arabia
| | - Juan S Ramirez-Prado
- Division of Biological and Environmental Sciences and Engineering, King Abdullah University of Science and Technology, Thuwal 23955-6900, Kingdom of Saudi Arabia
| | - Alaguraj Veluchamy
- Division of Biological and Environmental Sciences and Engineering, King Abdullah University of Science and Technology, Thuwal 23955-6900, Kingdom of Saudi Arabia
| | - David Latrasse
- Institute of Plant Sciences Paris-Saclay (IPS2), CNRS, INRA, University Paris-Sud, University of Evry, University Paris-Diderot, Sorbonne Paris-Cite, University of Paris-Saclay, Batiment 630, 91405 Orsay, France
| | - Cécile Raynaud
- Institute of Plant Sciences Paris-Saclay (IPS2), CNRS, INRA, University Paris-Sud, University of Evry, University Paris-Diderot, Sorbonne Paris-Cite, University of Paris-Saclay, Batiment 630, 91405 Orsay, France
| | - Martin Crespi
- Institute of Plant Sciences Paris-Saclay (IPS2), CNRS, INRA, University Paris-Sud, University of Evry, University Paris-Diderot, Sorbonne Paris-Cite, University of Paris-Saclay, Batiment 630, 91405 Orsay, France
| | - Federico Ariel
- Institute of Plant Sciences Paris-Saclay (IPS2), CNRS, INRA, University Paris-Sud, University of Evry, University Paris-Diderot, Sorbonne Paris-Cite, University of Paris-Saclay, Batiment 630, 91405 Orsay, France
| | - Moussa Benhamed
- Division of Biological and Environmental Sciences and Engineering, King Abdullah University of Science and Technology, Thuwal 23955-6900, Kingdom of Saudi Arabia Institute of Plant Sciences Paris-Saclay (IPS2), CNRS, INRA, University Paris-Sud, University of Evry, University Paris-Diderot, Sorbonne Paris-Cite, University of Paris-Saclay, Batiment 630, 91405 Orsay, France
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Romero-Soriano V, Burlet N, Vela D, Fontdevila A, Vieira C, García Guerreiro MP. Drosophila Females Undergo Genome Expansion after Interspecific Hybridization. Genome Biol Evol 2016; 8:556-61. [PMID: 26872773 PMCID: PMC4824032 DOI: 10.1093/gbe/evw024] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022] Open
Abstract
Genome size (or C-value) can present a wide range of values among eukaryotes. This variation has been attributed to differences in the amplification and deletion of different noncoding repetitive sequences, particularly transposable elements (TEs). TEs can be activated under different stress conditions such as interspecific hybridization events, as described for several species of animals and plants. These massive transposition episodes can lead to considerable genome expansions that could ultimately be involved in hybrid speciation processes. Here, we describe the effects of hybridization and introgression on genome size of Drosophila hybrids. We measured the genome size of two close Drosophila species, Drosophila buzzatii and Drosophila koepferae, their F1 offspring and the offspring from three generations of backcrossed hybrids; where mobilization of up to 28 different TEs was previously detected. We show that hybrid females indeed present a genome expansion, especially in the first backcross, which could likely be explained by transposition events. Hybrid males, which exhibit more variable C-values among individuals of the same generation, do not present an increased genome size. Thus, we demonstrate that the impact of hybridization on genome size can be detected through flow cytometry and is sex-dependent.
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Affiliation(s)
- Valèria Romero-Soriano
- Departament De Genètica I Microbiologia (Edifici C), Grup De Genòmica, Bioinformàtica I Biologia Evolutiva. Universitat Autònoma De Barcelona, Spain
| | - Nelly Burlet
- Laboratoire De Biométrie Et Biologie Evolutive, UMR5558, Université Lyon 1, Université Lyon, Villeurbanne, France
| | - Doris Vela
- Laboratorio De Genética Evolutiva, Pontificia Universidad Católica Del Ecuador, Quito, Ecuador
| | - Antonio Fontdevila
- Departament De Genètica I Microbiologia (Edifici C), Grup De Genòmica, Bioinformàtica I Biologia Evolutiva. Universitat Autònoma De Barcelona, Spain
| | - Cristina Vieira
- Laboratoire De Biométrie Et Biologie Evolutive, UMR5558, Université Lyon 1, Université Lyon, Villeurbanne, France
| | - María Pilar García Guerreiro
- Departament De Genètica I Microbiologia (Edifici C), Grup De Genòmica, Bioinformàtica I Biologia Evolutiva. Universitat Autònoma De Barcelona, Spain
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Larkin K, Tucci C, Neiman M. Effects of polyploidy and reproductive mode on life history trait expression. Ecol Evol 2016; 6:765-78. [PMID: 26865964 PMCID: PMC4739562 DOI: 10.1002/ece3.1934] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/02/2015] [Revised: 12/09/2015] [Accepted: 12/11/2015] [Indexed: 01/22/2023] Open
Abstract
Ploidy elevation is increasingly recognized as a common and important source of genomic variation. Even so, the consequences and biological significance of polyploidy remain unclear, especially in animals. Here, our goal was to identify potential life history costs and benefits of polyploidy by conducting a large multiyear common garden experiment in Potamopyrgus antipodarum, a New Zealand freshwater snail that is a model system for the study of ploidy variation, sexual reproduction, host-parasite coevolution, and invasion ecology. Sexual diploid and asexual triploid and tetraploid P. antipodarum frequently coexist, allowing for powerful direct comparisons across ploidy levels and reproductive modes. Asexual reproduction and polyploidy are very often associated in animals, allowing us to also use these comparisons to address the maintenance of sex, itself one of the most important unresolved questions in evolutionary biology. Our study revealed that sexual diploid P. antipodarum grow and mature substantially more slowly than their asexual polyploid counterparts. We detected a strong negative correlation between the rate of growth and age at reproductive maturity, suggesting that the relatively early maturation of asexual polyploid P. antipodarum is driven by relatively rapid growth. The absence of evidence for life history differences between triploid and tetraploid asexuals indicates that ploidy elevation is unlikely to underlie the differences in trait values that we detected between sexual and asexual snails. Finally, we found that sexual P. antipodarum did not experience discernable phenotypic variance-related benefits of sex and were more likely to die before achieving reproductive maturity than the asexuals. Taken together, these results suggest that under benign conditions, polyploidy does not impose obvious life history costs in P. antipodarum and that sexual P. antipodarum persist despite substantial life history disadvantages relative to their asexual counterparts.
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Affiliation(s)
- Katelyn Larkin
- Department of BiologyUniversity of IowaIowa CityIowa52242
| | - Claire Tucci
- Department of BiologyUniversity of IowaIowa CityIowa52242
| | - Maurine Neiman
- Department of BiologyUniversity of IowaIowa CityIowa52242
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50
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Nichele S, Giskeødegård A, Tufte G. Evolutionary Growth of Genome Representations on Artificial Cellular Organisms with Indirect Encodings. ARTIFICIAL LIFE 2015; 22:76-111. [PMID: 26606469 DOI: 10.1162/artl_a_00191] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
Evolutionary design targets systems of continuously increasing complexity. Thus, indirect developmental mappings are often a necessity. Varying the amount of genotype information changes the cardinality of the mapping, which in turn affects the developmental process. An open question is how to find the genotype size and representation in which a developmental solution would fit. A restricted pool of genes may not be large enough to encode a solution or may need complex heuristics to find a realistic size. On the other hand, using the whole set of possible regulatory combinations may be intractable. In nature, the genomes of biological organisms are not fixed in size; they slowly evolve and acquire new genes by random gene duplications. Such incremental growth of genome information can be beneficial also in the artificial domain. For an evolutionary and developmental (evo-devo) system based on cellular automata, we investigate an incremental evolutionary growth of genomes without any a priori knowledge on the necessary genotype size. Evolution starts with simple solutions in a low-dimensional space and incrementally increases the genotype complexity by means of gene duplication, allowing the evolution of scalable genomes that are able to adapt genetic information content while compactness and efficiency are retained. The results are consistent when the target phenotypic complexity, the geometry size, and the number of cell states are scaled up.
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