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Ekrt L, Férová A, Koutecký P, Vejvodová K, Hori K, Hornych O. An adventurous journey toward and away from fern apomixis: Insights from genome size and spore abortion patterns. AMERICAN JOURNAL OF BOTANY 2024; 111:e16332. [PMID: 38762794 DOI: 10.1002/ajb2.16332] [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: 09/02/2023] [Revised: 03/14/2024] [Accepted: 03/15/2024] [Indexed: 05/20/2024]
Abstract
PREMISE Apomixis in ferns is relatively common and obligatory. Sterile hybrids may restore fertility via apomixis at a cost of long-term genetic stagnation. In this study, we outlined apomixis as a possible temporary phase leading to sexuality and analyzed factors relating to transitioning to and away from apomixis, such as unreduced and reduced spore formation in apomict and apo-sex hybrid ferns. METHODS We analyzed the genome size of 15 fern species or hybrids ("taxa") via flow cytometry. The number of reduced and unreduced gametophytes was established as a proxy for viable spore formation of either type. We also calculated the spore abortion ratio (sign of reduced spores) in several taxa, including the apo-sex hybrid Dryopteris × critica and its 16 apomictically formed offspring. RESULTS Four of 15 sampled taxa yielded offspring variable in genome size. Specifically, each variable taxon formed one viable reduced plant among 12-451 sampled gametophytes per taxon. Thus, haploid spore formation in the studied apomicts was very rare but possible. Spore abortion analyses indicated gradually decreasing abortion (haploid spore formation) over time. In Dryopteris × critica, abortion decreased from 93.8% to mean 89.5% in one generation. CONCLUSIONS Our results support apomixis as a transitionary phase toward sexuality. Newly formed apomicts hybridize with sexual relatives and continue to form haploid spores early on. Thus, they may get the genomic content necessary for regular meiosis and restore sexuality. If the missing relative goes extinct, the lineage gets locked into apomixis as may be the case with the Dryopteris affinis complex.
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Affiliation(s)
- Libor Ekrt
- Department of Botany, Faculty of Science, University of South Bohemia, Branišovská 1760, České Budějovice, CZ-37005, Czech Republic
| | - Alžběta Férová
- Department of Botany, Faculty of Science, University of South Bohemia, Branišovská 1760, České Budějovice, CZ-37005, Czech Republic
| | - Petr Koutecký
- Department of Botany, Faculty of Science, University of South Bohemia, Branišovská 1760, České Budějovice, CZ-37005, Czech Republic
| | - Kateřina Vejvodová
- Department of Botany, Faculty of Science, University of South Bohemia, Branišovská 1760, České Budějovice, CZ-37005, Czech Republic
| | - Kiyotaka Hori
- The Kochi Prefectural Makino Botanical Garden, Godaisan 4200-6, Kochi, 781-8125, Japan
| | - Ondřej Hornych
- Department of Botany, Faculty of Science, University of South Bohemia, Branišovská 1760, České Budějovice, CZ-37005, Czech Republic
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Jiang RH, Liang SQ, Wu F, Tang LM, Qin B, Chen YY, Huang YH, Li KX, Zhang XC. Phylogenomic analysis, cryptic species discovery, and DNA barcoding of the genus Cibotium in China based on plastome data. FRONTIERS IN PLANT SCIENCE 2023; 14:1183653. [PMID: 37346120 PMCID: PMC10279961 DOI: 10.3389/fpls.2023.1183653] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 03/10/2023] [Accepted: 05/02/2023] [Indexed: 06/23/2023]
Abstract
Germplasm resources are the source of herbal medicine production. The cultivation of superior germplasm resources helps to resolve the conflict between long-term population persistence and growing market demand by consistently producing materials with high quality. The fern species Cibotium barometz is the original plant of cibotii rhizoma ("Gouji"), a traditional Chinese medicine used in the therapy of pain, weakness, and numbness in the lower extremities. Long-history medicinal use has caused serious wild population decline in China. Without sufficient understanding of the species and lineage diversity of Cibotium, it is difficult to propose a targeted conservation scheme at present, let alone select high-quality germplasm resources. In order to fill such a knowledge gap, this study sampled C. barometz and relative species throughout their distribution in China, performed genome skimming to obtain plastome data, and conducted phylogenomic analyses. We constructed a well-supported plastome phylogeny of Chinese Cibotium, which showed that three species with significant genetic differences are distributed in China, namely C. barometz, C. cumingii, and C. sino-burmaense sp. nov., a cryptic species endemic to NW Yunnan and adjacent regions of NE Myanmar. Moreover, our results revealed two differentiated lineages of C. barometz distributed on the east and west sides of a classic phylogeographic boundary that was probably shaped by monsoons and landforms. We also evaluated the resolution of nine traditional barcode loci and designed five new DNA barcodes based on the plastome sequence that can distinguish all these species and lineages of Chinese Cibotium accurately. These novel findings on a genetic basis will guide conservation planners and medicinal plant breeders to build systematic conservation plans and exploit the germplasm resources of Cibotium in China.
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Affiliation(s)
- Ri-Hong Jiang
- Guangxi Key Laboratory of Special Non-wood Forest Cultivation and Utilization, Guangxi Engineering and Technology Research Center for Woody Spices, Guangxi Forestry Research Institute, Nanning, China
| | - Si-Qi Liang
- State Key Laboratory of Systematic and Evolutionary Botany, Institute of Botany, The Chinese Academy of Sciences, Beijing, China
- China National Botanical Garden, Beijing, China
- College of Life Sciences, University of Chinese Academy of Sciences, Beijing, China
| | - Fei Wu
- China National Botanical Garden, Beijing, China
- Beijing Botanical Garden, Beijing, China
- Beijing Floriculture Engineering Technology Research Centre, Beijing, China
| | - Li-Ming Tang
- Guangxi Forestry Industry Group Stock Corporation, Nanning, China
| | - Bo Qin
- Guangxi Key Laboratory of Special Non-wood Forest Cultivation and Utilization, Guangxi Engineering and Technology Research Center for Woody Spices, Guangxi Forestry Research Institute, Nanning, China
| | - Ying-Ying Chen
- Guangxi Key Laboratory of Special Non-wood Forest Cultivation and Utilization, Guangxi Engineering and Technology Research Center for Woody Spices, Guangxi Forestry Research Institute, Nanning, China
| | - Yao-Heng Huang
- Guangxi Key Laboratory of Special Non-wood Forest Cultivation and Utilization, Guangxi Engineering and Technology Research Center for Woody Spices, Guangxi Forestry Research Institute, Nanning, China
| | - Kai-Xiang Li
- Guangxi Key Laboratory of Special Non-wood Forest Cultivation and Utilization, Guangxi Engineering and Technology Research Center for Woody Spices, Guangxi Forestry Research Institute, Nanning, China
| | - Xian-Chun Zhang
- State Key Laboratory of Systematic and Evolutionary Botany, Institute of Botany, The Chinese Academy of Sciences, Beijing, China
- China National Botanical Garden, Beijing, China
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Wang FG, Wang AH, Bai CK, Jin DM, Nie LY, Harris AJ, Che L, Wang JJ, Li SY, Xu L, Shen H, Gu YF, Shang H, Duan L, Zhang XC, Chen HF, Yan YH. Genome size evolution of the extant lycophytes and ferns. PLANT DIVERSITY 2022; 44:141-152. [PMID: 35505989 PMCID: PMC9043363 DOI: 10.1016/j.pld.2021.11.007] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/11/2021] [Revised: 11/24/2021] [Accepted: 11/28/2021] [Indexed: 05/11/2023]
Abstract
Ferns and lycophytes have remarkably large genomes. However, little is known about how their genome size evolved in fern lineages. To explore the origins and evolution of chromosome numbers and genome size in ferns, we used flow cytometry to measure the genomes of 240 species (255 samples) of extant ferns and lycophytes comprising 27 families and 72 genera, of which 228 species (242 samples) represent new reports. We analyzed correlations among genome size, spore size, chromosomal features, phylogeny, and habitat type preference within a phylogenetic framework. We also applied ANOVA and multinomial logistic regression analysis to preference of habitat type and genome size. Using the phylogeny, we conducted ancestral character reconstruction for habitat types and tested whether genome size changes simultaneously with shifts in habitat preference. We found that 2C values had weak phylogenetic signal, whereas the base number of chromosomes (x) had a strong phylogenetic signal. Furthermore, our analyses revealed a positive correlation between genome size and chromosome traits, indicating that the base number of chromosomes (x), chromosome size, and polyploidization may be primary contributors to genome expansion in ferns and lycophytes. Genome sizes in different habitat types varied significantly and were significantly correlated with habitat types; specifically, multinomial logistic regression indicated that species with larger 2C values were more likely to be epiphytes. Terrestrial habitat is inferred to be ancestral for both extant ferns and lycophytes, whereas transitions to other habitat types occurred as the major clades emerged. Shifts in habitat types appear be followed by periods of genomic stability. Based on these results, we inferred that habitat type changes and multiple whole-genome duplications have contributed to the formation of large genomes of ferns and their allies during their evolutionary history.
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Affiliation(s)
- Fa-Guo Wang
- Key Laboratory of Plant Resources Conservation and Sustainable Utilization, Guangdong Provincial Key Laboratory of Applied Botany, South China Botanical Garden, Chinese Academy of Sciences, Guangzhou, 510650, China
| | - Ai-Hua Wang
- Key Laboratory of Plant Resources Conservation and Sustainable Utilization, Guangdong Provincial Key Laboratory of Applied Botany, South China Botanical Garden, Chinese Academy of Sciences, Guangzhou, 510650, China
- Key Laboratory of Environment Change and Resources Use in Beibu Gulf, Ministry of Education, Nanning Normal University, Nanning, 530001, China
| | - Cheng-Ke Bai
- College of Life Sciences, Shaanxi Normal University, Xi'an, 710062, China
| | - Dong-Mei Jin
- Eastern China Conservation Centre for Wild Endangered Plant Resources, Shanghai Chenshan Botanical Garden, Shanghai, 201602, China
| | - Li-Yun Nie
- Key Laboratory of Plant Resources Conservation and Sustainable Utilization, Guangdong Provincial Key Laboratory of Applied Botany, South China Botanical Garden, Chinese Academy of Sciences, Guangzhou, 510650, China
| | - AJ Harris
- Key Laboratory of Plant Resources Conservation and Sustainable Utilization, Guangdong Provincial Key Laboratory of Applied Botany, South China Botanical Garden, Chinese Academy of Sciences, Guangzhou, 510650, China
- Department of Biology, Oberlin College, Oberlin, OH, 44074, USA
| | - Le Che
- College of Life Sciences, Shaanxi Normal University, Xi'an, 710062, China
| | - Juan-Juan Wang
- College of Life Sciences, Shaanxi Normal University, Xi'an, 710062, China
| | - Shi-Yu Li
- Key Laboratory of Plant Resources Conservation and Sustainable Utilization, Guangdong Provincial Key Laboratory of Applied Botany, South China Botanical Garden, Chinese Academy of Sciences, Guangzhou, 510650, China
| | - Lei Xu
- Key Laboratory of Plant Resources Conservation and Sustainable Utilization, Guangdong Provincial Key Laboratory of Applied Botany, South China Botanical Garden, Chinese Academy of Sciences, Guangzhou, 510650, China
| | - Hui Shen
- Eastern China Conservation Centre for Wild Endangered Plant Resources, Shanghai Chenshan Botanical Garden, Shanghai, 201602, China
| | - Yu-Feng Gu
- Eastern China Conservation Centre for Wild Endangered Plant Resources, Shanghai Chenshan Botanical Garden, Shanghai, 201602, China
- Key Laboratory of National Forestry and Grassland Administration for Orchid Conservation and Utilization, the National Orchid Conservation Center of China and the Orchid Conservation & Research Center of Shenzhen, 518114, Shenzhen, China
- Life Science and Technology College, Harbin Normal University, Harbin, 150025, China
| | - Hui Shang
- Eastern China Conservation Centre for Wild Endangered Plant Resources, Shanghai Chenshan Botanical Garden, Shanghai, 201602, China
| | - Lei Duan
- Key Laboratory of Plant Resources Conservation and Sustainable Utilization, Guangdong Provincial Key Laboratory of Applied Botany, South China Botanical Garden, Chinese Academy of Sciences, Guangzhou, 510650, China
| | - Xian-Chun Zhang
- State Key Laboratory of Systematic and Evolutionary Botany, Institute of Botany, Chinese Academy of Sciences, Beijing, 100093, China
| | - Hong-Feng Chen
- Key Laboratory of Plant Resources Conservation and Sustainable Utilization, Guangdong Provincial Key Laboratory of Applied Botany, South China Botanical Garden, Chinese Academy of Sciences, Guangzhou, 510650, China
- Corresponding author.
| | - Yue-Hong Yan
- Eastern China Conservation Centre for Wild Endangered Plant Resources, Shanghai Chenshan Botanical Garden, Shanghai, 201602, China
- Key Laboratory of National Forestry and Grassland Administration for Orchid Conservation and Utilization, the National Orchid Conservation Center of China and the Orchid Conservation & Research Center of Shenzhen, 518114, Shenzhen, China
- Corresponding author. The National Orchid Conservation Center of China and the Orchid Conservation & Research Center of Shenzhen, 518114, Shenzhen, Guangdong, China.
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Kuo L, Tang SK, Kao T, Ebihara A, Fawcett S, Hsiao M, Shinohara W, Dauphin B. A dormant resource for genome size estimation in ferns: C-value inference of the Ophioglossaceae using herbarium specimen spores. APPLICATIONS IN PLANT SCIENCES 2021; 9:e11452. [PMID: 34938613 PMCID: PMC8664048 DOI: 10.1002/aps3.11452] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/14/2021] [Revised: 10/19/2021] [Accepted: 10/21/2021] [Indexed: 06/14/2023]
Abstract
PREMISE The great variation of genome size (C-value) across land plants is linked to various adaptative features. Flow cytometry (FCM), the standard approach to estimating C-values, relies mostly on fresh materials, performing poorly when used with herbarium materials. No fern C-value reports have been derived from herbarium specimens; however, the herbarium spores of some ferns remain highly viable for decades and are thus promising for further investigation. To explore this possibility, we evaluated herbarium spore collections of Ophioglossaceae ferns using FCM. METHODS Flow cytometry was conducted on 24 spore samples, representing eight of the 12 genera of the Ophioglossaceae, using specimens ranging in age from 2.6 to 111 years obtained from five herbaria. RESULTS Regardless of the genus or the source herbarium, high-quality C-value data were generated from 17 samples, with the oldest being 26 years old. Estimates of the C-values from sporophytic tissues of known ploidy did not reveal any evidence of apomixis for the species surveyed here. We also detected a pronounced genome downsizing in Sceptridium polyploids. DISCUSSION The recent success of FCM for C-value estimation using spores provides a much more convenient method of utilizing "dry" refrigerated materials. We demonstrate here that herbarium spores of some ferns are also promising for this use, even for older specimens.
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Affiliation(s)
- Li‐Yaung Kuo
- Institute of Molecular and Cellular BiologyNational Tsing Hua UniversityHsinchu CityTaiwan
| | - Sheng Kai Tang
- Institute of Molecular and Cellular BiologyNational Tsing Hua UniversityHsinchu CityTaiwan
| | - Tzu‐Tong Kao
- Department of BiologyDuke UniversityDurhamNorth CarolinaUSA
- Institute of Plant and Microbial BiologyAcademia SinicaTaipei CityTaiwan
| | - Atsushi Ebihara
- Department of BotanyNational Museum of Nature and Science, TsukubaIbarakiJapan
| | - Susan Fawcett
- University and Jepson Herbaria, University of California, BerkeleyCaliforniaUSA
| | - Min‐Chien Hsiao
- Institute of Ecology and Evolutionary BiologyNational Taiwan UniversityTaipei CityTaiwan
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Lima LV, Sousa SMDE, Almeida TE, Salino A. State of the art in cytogenetics, insights into chromosome number evolution, and new C-value reports for the fern family Gleicheniaceae. AN ACAD BRAS CIENC 2021; 93:e20201881. [PMID: 34550205 DOI: 10.1590/0001-3765202120201881] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/07/2020] [Accepted: 05/10/2021] [Indexed: 11/22/2022] Open
Abstract
Studies concerning the cytogenetics of Gleicheniaceae have been scarce, especially those employing evolutionary approaches. Two chromosome number evolutionary models have been hypothesized for Gleicheniaceae. One proposes that ancestral haploid numbers were small and that the chromosome numbers of extant species evolved through polyploidy. The other model proposes that, at the genus level, fern chromosome evolution occurred from ancestors with essentially the same high chromosome numbers seen in living lineages. Neither of those hypotheses has been tested based on phylogenetic frameworks. We sought to (i) present the state of the art of Gleicheniaceae chromosome numbers; (ii) test the two evolutionary models of chromosome numbers within a phylogenetic framework; (iii) test correlations between DNA contents and chromosome numbers in the family. We report here DNA C-values for five species, which increases the number of investigated taxa nearly twofold and report two new genera records. Ancestral state chromosome reconstruction corroborates the hypothesis that ancestral chromosome numbers in Gleicheniaceae were as high as those of extant lineages. Our results demonstrate the possible role of dysploidy in the evolutionary chromosome history of Gleicheniaceae at the genus level and suggest that the relationship between chromosome number and DNA content does not appear to be linear.
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Affiliation(s)
- Lucas Vieira Lima
- Universidade Federal de Minas Gerais, Instituto de Ciências Biológicas, Departamento de Botânica, Laboratório de Sistemática Vegetal, Av. Antônio Carlos, 6627, 31270-901, Belo Horizonte, MG, Brazil
| | - Saulo Marçal DE Sousa
- Universidade Federal de Juiz de Fora, Instituto de Ciências Biológicas, Departamento de Biologia, Laboratório de Genética e Biotecnologia, Rua José Lourenço Kelmer, s/n, 36036-900 Juiz de Fora, MG, Brazil
| | - Thaís Elias Almeida
- Universidade Federal do Oeste do Pará, Herbário HSTM, Avenida Marechal Rondon, s/n, 68040-070 Santarém, PA, Brazil
| | - Alexandre Salino
- Universidade Federal de Minas Gerais, Instituto de Ciências Biológicas, Departamento de Botânica, Laboratório de Sistemática Vegetal, Av. Antônio Carlos, 6627, 31270-901, Belo Horizonte, MG, Brazil
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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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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: 39] [Impact Index Per Article: 9.8] [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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Vitales D, García-Fernández A, Garnatje T, Vallès J, Font J, Robert Y, Vigo J. <em>Pellaea calomelanos</em> (Pteridaceae) en Cataluña: es realmente una disyunción ancestral? COLLECTANEA BOTANICA 2019. [DOI: 10.3989/collectbot.2019.v38.010] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022] Open
Abstract
Pellaea calomelanos es una especie que fue descubierta en África y cuya área de distribución se ha ido ampliando más recientemente a Asia y a una única localidad europea, que comprende tres poblaciones, en Cataluña. El hecho de pertenecer a los helechos y de presentar esta distribución disyunta alimentaron la idea de una especie relicta resultante de distribución amplia en tiempos remotos. Los valores 2C van desde 16,45 pg para el individuo de la Isla de la Reunión hasta 17,40 pg para la población de Boadella (Cataluña). Aunque existe una cierta variabilidad, no se han encontrado diferencias estadísticamente significativas entre ellos. El análisis filogenético revela un clado bien soportado que agrupa a todos los individuos de las diferentes poblaciones de P. calomelanos pero sin ningún tipo de resolución interna. Los resultados del presente trabajo, basado en medidas de cantidad de ADN nuclear y en secuencias de dos regiones del ADN cloroplástico, junto con las características de su hábitat, permiten a los autores hipotetizar sobre una colonización reciente del continente europeo por esta especie.
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Morero RE, Deanna R, Barboza GE, Barrington DS. Historical biogeography of the fern genus Polystichum (Dryopteridaceae) in Austral South America. Mol Phylogenet Evol 2019; 137:168-189. [PMID: 31077789 DOI: 10.1016/j.ympev.2019.05.004] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/03/2018] [Revised: 05/06/2019] [Accepted: 05/07/2019] [Indexed: 10/26/2022]
Abstract
A group of seven endemic Polystichum species inhabit Patagonia, the southern region of South America. To date, evolutionary relationships of these Austral South American Polystichum remain unknown. The biota of the Southern Andes appears to be more closely related to the temperate Australasian species than to northern South American ones. Differences in morphological characters suggested that Austral South American Polystichum follows that biogeographical pattern, not being closely related to their congeners in the Northern and Central Andes. We sought to reveal the evolutionary relationships, estimate the divergence times and reconstruct both ancestral areas and ancestral ploidy levels of Austral South America Polystichum. Phylogenetic relationships were estimated using maximum likelihood and Bayesian approaches. The seven Austral South American species plus 31 Polystichum species spanning all other major biogeographic regions were sampled for three DNA markers. Divergence times were estimated in BEAST and Bayesian binary Markov chain Monte Carlo reconstruction was applied in order to infer ancestral areas. The evolution of ploidy was reconstructed on the maximum clade credibility tree, using stochastic character mapping. Austral South American Polystichum was recovered as monophyletic. The earliest divergence reconstructed within the Austral South American Clade was that of Polystichum andinum; subsequently two other lineages diverged comprising the remaining Austral South American species. The Austral South American lineage is not closely allied to North and Central Andes congeners. Long-distance dispersal of an ancestral tetraploid from Australasia during the late Miocene is the most likely explanation for the origin of Patagonian Polystichum. Then, Pliocene and Pleistocene orogenic and climatic changes may have shaped its diversification in Patagonia.
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Affiliation(s)
- Rita E Morero
- Instituto Multidisciplinario de Biología Vegetal, IMBIV (CONICET-UNC), CC 495, Córdoba 5000, Argentina; Facultad de Ciencias Químicas, Universidad Nacional de Córdoba, Haya de la Torre y Medina Allende, Córdoba, Argentina.
| | - Rocío Deanna
- Instituto Multidisciplinario de Biología Vegetal, IMBIV (CONICET-UNC), CC 495, Córdoba 5000, Argentina; Facultad de Ciencias Químicas, Universidad Nacional de Córdoba, Haya de la Torre y Medina Allende, Córdoba, Argentina
| | - Gloria E Barboza
- Instituto Multidisciplinario de Biología Vegetal, IMBIV (CONICET-UNC), CC 495, Córdoba 5000, Argentina; Facultad de Ciencias Químicas, Universidad Nacional de Córdoba, Haya de la Torre y Medina Allende, Córdoba, Argentina
| | - David S Barrington
- University of Vermont, Pringle Herbarium, Torrey Hall, 27 Colchester Avenue, Burlington, VT 05405, United States
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Clark J, Hidalgo O, Pellicer J, Liu H, Marquardt J, Robert Y, Christenhusz M, Zhang S, Gibby M, Leitch IJ, Schneider H. Genome evolution of ferns: evidence for relative stasis of genome size across the fern phylogeny. THE NEW PHYTOLOGIST 2016; 210:1072-82. [PMID: 26756823 DOI: 10.1111/nph.13833] [Citation(s) in RCA: 67] [Impact Index Per Article: 8.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/06/2015] [Accepted: 11/16/2015] [Indexed: 05/06/2023]
Abstract
The genome evolution of ferns has been considered to be relatively static compared with angiosperms. In this study, we analyse genome size data and chromosome numbers in a phylogenetic framework to explore three hypotheses: the correlation of genome size and chromosome number, the origin of modern ferns from ancestors with high chromosome numbers, and the occurrence of several whole-genome duplications during the evolution of ferns. To achieve this, we generated new genome size data, increasing the percentage of fern species with genome sizes estimated to 2.8% of extant diversity, and ensuring a comprehensive phylogenetic coverage including at least three species from each fern order. Genome size was correlated with chromosome number across all ferns despite some substantial variation in both traits. We observed a trend towards conservation of the amount of DNA per chromosome, although Osmundaceae and Psilotaceae have substantially larger chromosomes. Reconstruction of the ancestral genome traits suggested that the earliest ferns were already characterized by possessing high chromosome numbers and that the earliest divergences in ferns were correlated with substantial karyological changes. Evidence for repeated whole-genome duplications was found across the phylogeny. Fern genomes tend to evolve slowly, albeit genome rearrangements occur in some clades.
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Affiliation(s)
- James Clark
- Department of Life Sciences, Natural History Museum, London, SW7 5BD, UK
- School of Earth Sciences, University of Bristol, Life Sciences Building, Tyndall Avenue, Bristol, BS8 1TQ, UK
| | - Oriane Hidalgo
- Royal Botanic Gardens, Kew, Richmond, Surrey, TW8 3DS, UK
| | - Jaume Pellicer
- Royal Botanic Gardens, Kew, Richmond, Surrey, TW8 3DS, UK
| | - Hongmei Liu
- Shenzhen Key Laboratory of Southern Subtropical Plant Diversity, Fairylake Botanical Garden, Shenzhen & The Chinese Academy of Sciences, Shenzhen, 518004, China
| | - Jeannine Marquardt
- Department of Life Sciences, Natural History Museum, London, SW7 5BD, UK
| | - Yannis Robert
- 18, Rue des Capucines, F-97431, La Plaine des Palmistes, La Réunion, France
| | - Maarten Christenhusz
- Royal Botanic Gardens, Kew, Richmond, Surrey, TW8 3DS, UK
- Plant Gateway, 5 Talbot Street, Hertford, Hertfordshire, SG13 7BX, UK
| | - Shouzhou Zhang
- Shenzhen Key Laboratory of Southern Subtropical Plant Diversity, Fairylake Botanical Garden, Shenzhen & The Chinese Academy of Sciences, Shenzhen, 518004, China
| | - Mary Gibby
- Department of Science, Royal Botanic Garden Edinburgh, Edinburgh, EH3 5LR, UK
| | - Ilia J Leitch
- Royal Botanic Gardens, Kew, Richmond, Surrey, TW8 3DS, UK
| | - Harald Schneider
- Department of Life Sciences, Natural History Museum, London, SW7 5BD, UK
- School of Life Sciences, Sun Yatsen University, Guangzhou, 510275, Guangdong, China
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11
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Yan H, Martin SL, Bekele WA, Latta RG, Diederichsen A, Peng Y, Tinker NA. Genome size variation in the genus Avena. Genome 2016; 59:209-20. [PMID: 26881940 DOI: 10.1139/gen-2015-0132] [Citation(s) in RCA: 46] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Genome size is an indicator of evolutionary distance and a metric for genome characterization. Here, we report accurate estimates of genome size in 99 accessions from 26 species of Avena. We demonstrate that the average genome size of C genome diploid species (2C = 10.26 pg) is 15% larger than that of A genome species (2C = 8.95 pg), and that this difference likely accounts for a progression of size among tetraploid species, where AB < AC < CC (average 2C = 16.76, 18.60, and 21.78 pg, respectively). All accessions from three hexaploid species with the ACD genome configuration had similar genome sizes (average 2C = 25.74 pg). Genome size was mostly consistent within species and in general agreement with current information about evolutionary distance among species. Results also suggest that most of the polyploid species in Avena have experienced genome downsizing in relation to their diploid progenitors. Genome size measurements could provide additional quality control for species identification in germplasm collections, especially in cases where diploid and polyploid species have similar morphology.
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Affiliation(s)
- Honghai Yan
- a Agriculture and Agri-Food Canada, Ottawa Research and Development Centre, 960 Carling Ave., Bldg. 20, C.E.F., Ottawa, ON K1A 0C6, Canada.,b Triticeae Research Institute, Sichuan Agricultural University, Wenjiang, Chengdu 611130, Sichuan, People's Republic of China
| | - Sara L Martin
- a Agriculture and Agri-Food Canada, Ottawa Research and Development Centre, 960 Carling Ave., Bldg. 20, C.E.F., Ottawa, ON K1A 0C6, Canada
| | - Wubishet A Bekele
- a Agriculture and Agri-Food Canada, Ottawa Research and Development Centre, 960 Carling Ave., Bldg. 20, C.E.F., Ottawa, ON K1A 0C6, Canada
| | - Robert G Latta
- c Department of Biology, Dalhousie University, 1355 Oxford St., Halifax, NS B3H 4R2, Canada
| | - Axel Diederichsen
- d Agriculture and Agri-Food Canada, Plant Gene Resources of Canada, 107 Science Place, Saskatoon, SK S7N 0X2, Canada
| | - Yuanying Peng
- b Triticeae Research Institute, Sichuan Agricultural University, Wenjiang, Chengdu 611130, Sichuan, People's Republic of China
| | - Nicholas A Tinker
- a Agriculture and Agri-Food Canada, Ottawa Research and Development Centre, 960 Carling Ave., Bldg. 20, C.E.F., Ottawa, ON K1A 0C6, Canada
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12
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Telfer AC, Young MR, Quinn J, Perez K, Sobel CN, Sones JE, Levesque-Beaudin V, Derbyshire R, Fernandez-Triana J, Rougerie R, Thevanayagam A, Boskovic A, Borisenko AV, Cadel A, Brown A, Pages A, Castillo AH, Nicolai A, Glenn Mockford BM, Bukowski B, Wilson B, Trojahn B, Lacroix CA, Brimblecombe C, Hay C, Ho C, Steinke C, Warne CP, Garrido Cortes C, Engelking D, Wright D, Lijtmaer DA, Gascoigne D, Hernandez Martich D, Morningstar D, Neumann D, Steinke D, Marco DeBruin DD, Dobias D, Sears E, Richard E, Damstra E, Zakharov EV, Laberge F, Collins GE, Blagoev GA, Grainge G, Ansell G, Meredith G, Hogg I, McKeown J, Topan J, Bracey J, Guenther J, Sills-Gilligan J, Addesi J, Persi J, Layton KKS, D'Souza K, Dorji K, Grundy K, Nghidinwa K, Ronnenberg K, Lee KM, Xie L, Lu L, Penev L, Gonzalez M, Rosati ME, Kekkonen M, Kuzmina M, Iskandar M, Mutanen M, Fatahi M, Pentinsaari M, Bauman M, Nikolova N, Ivanova NV, Jones N, Weerasuriya N, Monkhouse N, Lavinia PD, Jannetta P, Hanisch PE, McMullin RT, Ojeda Flores R, Mouttet R, Vender R, Labbee RN, Forsyth R, Lauder R, Dickson R, Kroft R, Miller SE, MacDonald S, Panthi S, Pedersen S, Sobek-Swant S, Naik S, Lipinskaya T, Eagalle T, Decaëns T, Kosuth T, Braukmann T, Woodcock T, Roslin T, Zammit T, Campbell V, Dinca V, Peneva V, Hebert PDN, deWaard JR. Biodiversity inventories in high gear: DNA barcoding facilitates a rapid biotic survey of a temperate nature reserve. Biodivers Data J 2015; 3:e6313. [PMID: 26379469 PMCID: PMC4568406 DOI: 10.3897/bdj.3.e6313] [Citation(s) in RCA: 55] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/24/2015] [Accepted: 08/24/2015] [Indexed: 12/30/2022] Open
Abstract
BACKGROUND Comprehensive biotic surveys, or 'all taxon biodiversity inventories' (ATBI), have traditionally been limited in scale or scope due to the complications surrounding specimen sorting and species identification. To circumvent these issues, several ATBI projects have successfully integrated DNA barcoding into their identification procedures and witnessed acceleration in their surveys and subsequent increase in project scope and scale. The Biodiversity Institute of Ontario partnered with the rare Charitable Research Reserve and delegates of the 6th International Barcode of Life Conference to complete its own rapid, barcode-assisted ATBI of an established land trust in Cambridge, Ontario, Canada. NEW INFORMATION The existing species inventory for the rare Charitable Research Reserve was rapidly expanded by integrating a DNA barcoding workflow with two surveying strategies - a comprehensive sampling scheme over four months, followed by a one-day bioblitz involving international taxonomic experts. The two surveys resulted in 25,287 and 3,502 specimens barcoded, respectively, as well as 127 human observations. This barcoded material, all vouchered at the Biodiversity Institute of Ontario collection, covers 14 phyla, 29 classes, 117 orders, and 531 families of animals, plants, fungi, and lichens. Overall, the ATBI documented 1,102 new species records for the nature reserve, expanding the existing long-term inventory by 49%. In addition, 2,793 distinct Barcode Index Numbers (BINs) were assigned to genus or higher level taxonomy, and represent additional species that will be added once their taxonomy is resolved. For the 3,502 specimens, the collection, sequence analysis, taxonomic assignment, data release and manuscript submission by 100+ co-authors all occurred in less than one week. This demonstrates the speed at which barcode-assisted inventories can be completed and the utility that barcoding provides in minimizing and guiding valuable taxonomic specialist time. The final product is more than a comprehensive biotic inventory - it is also a rich dataset of fine-scale occurrence and sequence data, all archived and cross-linked in the major biodiversity data repositories. This model of rapid generation and dissemination of essential biodiversity data could be followed to conduct regional assessments of biodiversity status and change, and potentially be employed for evaluating progress towards the Aichi Targets of the Strategic Plan for Biodiversity 2011-2020.
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Affiliation(s)
| | | | - Jenna Quinn
- rare Charitable Research Reserve, Cambridge, Canada
| | - Kate Perez
- Biodiversity Institute of Ontario, Guelph, Canada
| | | | | | | | | | | | | | | | | | | | - Alex Cadel
- University of Waterloo, Waterloo, Canada
| | | | - Anais Pages
- Université de Montpellier, Montpellier, France
| | | | | | | | - Belén Bukowski
- Museo Argentino de Ciencias Naturales "Bernardino Rivadavia" (MACN-CONICET), Buenos Aires, Argentina
| | - Bill Wilson
- rare Charitable Research Reserve (Affiliate of), Cambridge, Canada
| | | | | | | | | | - Christmas Ho
- Biodiversity Institute of Ontario, Guelph, Canada
| | | | | | | | | | | | - Dario A Lijtmaer
- Museo Argentino de Ciencias Naturales "Bernardino Rivadavia" (MACN-CONICET), Buenos Aires, Argentina
| | - David Gascoigne
- rare Charitable Research Reserve (Affiliate of), Cambridge, Canada
| | | | | | - Dirk Neumann
- SNSB, Zoologische Staatssammlung Muenchen, Munich, Germany
| | - Dirk Steinke
- Biodiversity Institute of Ontario, Guelph, Canada
| | | | | | | | | | - Emily Damstra
- rare Charitable Research Reserve (Affiliate of), Cambridge, Canada
| | | | | | | | | | - Gerrie Grainge
- rare Charitable Research Reserve (Affiliate of), Cambridge, Canada
| | | | | | - Ian Hogg
- University of Waikato, Hamilton, New Zealand
| | | | - Janet Topan
- Biodiversity Institute of Ontario, Guelph, Canada
| | - Jason Bracey
- rare Charitable Research Reserve (Affiliate of), Cambridge, Canada
| | - Jerry Guenther
- rare Charitable Research Reserve (Affiliate of), Cambridge, Canada
| | | | | | - Joshua Persi
- Biodiversity Institute of Ontario, Guelph, Canada
| | | | | | | | - Kevin Grundy
- rare Charitable Research Reserve (Affiliate of), Cambridge, Canada
| | - Kirsti Nghidinwa
- Ministry of Environment and Tourism in Namibia, Windhoek, Namibia
| | | | | | - Linxi Xie
- The University of Western Ontario, London, Canada
| | - Liuqiong Lu
- Biodiversity Institute of Ontario, Guelph, Canada
| | | | - Mailyn Gonzalez
- Instituto de Investigación de Recursos Biológicos Alexander von Humboldt, Bogotá, Colombia
| | - Margaret E Rosati
- Smithsonian National Museum of Natural History, Washington, United States of America
| | | | | | | | | | | | | | - Miriam Bauman
- rare Charitable Research Reserve (Affiliate of), Cambridge, Canada
| | | | | | | | | | | | - Pablo D Lavinia
- Museo Argentino de Ciencias Naturales "Bernardino Rivadavia" (MACN-CONICET), Buenos Aires, Argentina
| | | | - Priscila E Hanisch
- Museo Argentino de Ciencias Naturales "Bernardino Rivadavia" (MACN-CONICET), Buenos Aires, Argentina
| | | | | | - Raphaëlle Mouttet
- ANSES, Laboratoire de la Santé des Végétaux, Montferrier sur Lez, France
| | - Reid Vender
- Biodiversity Institute of Ontario, Guelph, Canada
| | | | | | | | - Ross Dickson
- rare Charitable Research Reserve (Affiliate of), Cambridge, Canada
| | - Ruth Kroft
- rare Charitable Research Reserve (Affiliate of), Cambridge, Canada
| | - Scott E Miller
- Smithsonian National Museum of Natural History, Washington, United States of America
| | | | - Sishir Panthi
- Ministry of Forests and Soil Conservation, Kathmandu, Nepal
| | | | | | - Suresh Naik
- Biodiversity Institute of Ontario, Guelph, Canada
| | - Tatsiana Lipinskaya
- Scientific and Practical Center for Bioresources, National Academy of Sciences of Belarus, Minsk, Belarus
| | | | - Thibaud Decaëns
- Université de Montpellier Centre d'Ecologie Fonctionnelle et Evolutive, Montpellier, France
| | | | | | - Tom Woodcock
- rare Charitable Research Reserve, Cambridge, Canada
| | - Tomas Roslin
- University of Helsinki, Helsinki, Finland
- Swedish University of Agricultural Sciences, Uppsala, Sweden
| | - Tony Zammit
- Grand River Conservation Authority, Cambridge, Canada
| | | | - Vlad Dinca
- Biodiversity Institute of Ontario, Guelph, Canada
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