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Nakashima K, Yuhazu M, Mikuriya S, Kasai M, Abe J, Taneda A, Kanazawa A. Frequency of cytosine methylation in the adjacent regions of soybean retrotransposon SORE-1 depends on chromosomal location. Genome 2024; 67:1-12. [PMID: 37746933 DOI: 10.1139/gen-2023-0044] [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] [Indexed: 09/26/2023]
Abstract
Mobilization of transposable elements (TEs) is suppressed by epigenetic mechanisms involving cytosine methylation. However, few studies have focused on clarifying relationships between epigenetic influences of TEs on the adjacent DNA regions and time after insertion of TEs into the genome and/or their chromosomal location. Here we addressed these issues using soybean retrotransposon SORE-1. We analyzed SORE-1, inserted in exon 1 of the GmphyA2 gene, one of the newest insertions in this family so far identified. Cytosine methylation was detected in this element but was barely present in the adjacent regions. These results were correlated, respectively, with the presence and absence of the production of short interfering RNAs. Cytosine methylation profiles of 74 SORE-1 elements in the Williams 82 reference genome indicated that methylation frequency in the adjacent regions of SORE-1 was profoundly higher in pericentromeric regions than in euchromatic chromosome arms and was only weakly correlated with the length of time after insertion into the genome. Notably, the higher level of methylation in the 5' adjacent regions of SORE-1 coincided with the presence of repetitive elements in pericentromeric regions. Together, these results suggest that epigenetic influence of SORE-1 on the adjacent regions is influenced by its location on the chromosome.
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Affiliation(s)
- Kenta Nakashima
- Research Faculty of Agriculture, Hokkaido University, Sapporo 060-8589, Japan
| | - Mashiro Yuhazu
- Research Faculty of Agriculture, Hokkaido University, Sapporo 060-8589, Japan
| | - Shun Mikuriya
- Research Faculty of Agriculture, Hokkaido University, Sapporo 060-8589, Japan
| | - Megumi Kasai
- Research Faculty of Agriculture, Hokkaido University, Sapporo 060-8589, Japan
| | - Jun Abe
- Research Faculty of Agriculture, Hokkaido University, Sapporo 060-8589, Japan
| | - Akito Taneda
- Graduate School of Science and Technology, Hirosaki University, Hirosaki, Aomori 036-8561, Japan
| | - Akira Kanazawa
- Research Faculty of Agriculture, Hokkaido University, Sapporo 060-8589, Japan
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Okamoto M, Monden Y, Shindo A, Takeuchi T, Endo T, Shigematsu Y, Takasaki K, Fujii H, Shimada T. A target cultivar-specific identification system based on the chromatographic printed array strip method for eight prominent Japanese citrus cultivars. BREEDING SCIENCE 2023; 73:146-157. [PMID: 37404354 PMCID: PMC10316311 DOI: 10.1270/jsbbs.22065] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 08/03/2022] [Accepted: 11/10/2022] [Indexed: 07/06/2023]
Abstract
Citrus is a major cultivated crop in Japan, and new cultivars are of great interest in the Japanese and global market. Recently, the infringement of breeders' rights to citrus cultivars bred in Japan has become a problem related to the agricultural product export strategy promoted by the Japanese government. Cultivar identification systems using DNA markers are an effective tool for protecting breeders' rights. Here, a novel target cultivar-specific identification system using the chromatographic printed array strip method was developed for eight prominent Japanese citrus cultivars. A polymorphic InDel fragment specific to each cultivar was explored through the screening of published citrus InDel markers and next-generation sequencing of retrotransposon libraries. The cultivar-specific DNA marker set for each cultivar comprised 1-3 polymorphic InDel fragments in combination with a PCR-positive DNA marker for the ribulose-1,5-bisphosphate carboxylase/oxygenase large subunit gene. The DNA markers were detected within 3 hours from DNA extraction to the detection by the C-PAS4 membrane stick following multiplex PCR. The developed system is superior as a convenient, rapid, and cost-effective DNA diagnostic method during inspection. The proposed target cultivar-specific identification system is expected to serve as an efficient tool for the injunction of suspicious registered cultivars, contributing to the protection of breeders' rights.
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Affiliation(s)
- Mitsutoshi Okamoto
- Ehime Research Institute of Citrus Fruits, Yoshida, Uwajima, Ehime 799-3742, Japan
| | - Yuki Monden
- Graduate School of Environmental and Life Science, Okayama University, 1-1-1 Tsushimanaka Kitaku, Okayama, Okayama 700-8530, Japan
| | - Akiko Shindo
- Graduate School of Environmental and Life Science, Okayama University, 1-1-1 Tsushimanaka Kitaku, Okayama, Okayama 700-8530, Japan
| | | | - Tomoko Endo
- National Agriculture and Food Research Organization Institute of Fruit and Tea Tree Science, Shimizu, Shizuoka 424-0292, Japan
| | - Yukinori Shigematsu
- Ehime Research Institute of Citrus Fruits, Yoshida, Uwajima, Ehime 799-3742, Japan
| | - Kazuto Takasaki
- FASMAC Co., Ltd., 3088 Okada, Atsugi, Kanagawa 243-0021, Japan
| | - Hiroshi Fujii
- National Agriculture and Food Research Organization Institute of Fruit and Tea Tree Science, Shimizu, Shizuoka 424-0292, Japan
| | - Takehiko Shimada
- National Agriculture and Food Research Organization Institute of Fruit and Tea Tree Science, Shimizu, Shizuoka 424-0292, Japan
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Metcalfe CJ, Li J, Zheng B, Stiller J, Healey A, Piperidis N, Aitken KS. Isolation and sequencing of a single copy of an introgressed chromosome from a complex genome for gene and SNP identification. TAG. THEORETICAL AND APPLIED GENETICS. THEORETISCHE UND ANGEWANDTE GENETIK 2022; 135:1279-1292. [PMID: 35275251 DOI: 10.1007/s00122-022-04030-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/21/2021] [Accepted: 12/31/2021] [Indexed: 06/14/2023]
Abstract
This manuscript describes the identification, isolation and sequencing of a single chromosome containing high value resistance genes from a complex polyploid where sequencing the whole genome is too costly. The large complex genomes of many crops constrain the use of new technologies for genome-assisted selection and genetic improvement. One method to simplify a genome is to break it into individual chromosomes by flow cytometry; however, in many crop species most chromosomes cannot be isolated individually. Flow sorting of a single copy of a chromosome has been developed in wheat, and here we demonstrate its use to identify markers of interest in an Erianthus/Sacchurum hybrid. Erianthus/Saccharum hybrids are of interest because Erianthus is known to be highly resistant to soil borne diseases which cause extensive sugarcane yield losses in Australia. Sugarcane (Saccharum) cultivars are autopolyploids with a highly complex genome and over 100 chromosomes. Flow cytometry for sugarcane, as in most crops, does not resolve individual chromosomes to a karyotype peak for sorting. To isolate a single chromosome, we used genomic in situ hybridization (GISH) to identify the flow karyotype region containing the Erianthus chromosomes, flow sorted single chromosomes from this region, PCR screened for the Erianthus chromosomes and sequenced them. One Erianthus chromosome amplified and sequenced well, and from this data we could identify 57 resistant type genes and SNPs in nearly half of these genes. We developed KASP SNP assays and demonstrated that the identified SNP markers segregated as expected in a small introgression population. The pipeline we developed here to flow sort and sequence single chromosomes could be used in any crop with a large complex genome to rapidly discover and develop markers to important loci.
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Affiliation(s)
- Cushla J Metcalfe
- CSIRO Agriculture and Food, Queensland Biosciences Precinct, 306 Carmody Rd, St. Lucia, QLD, 4067, Australia
| | - Jingchuan Li
- CSIRO Agriculture and Food, Queensland Biosciences Precinct, 306 Carmody Rd, St. Lucia, QLD, 4067, Australia
| | - Bangyou Zheng
- CSIRO Agriculture and Food, Queensland Biosciences Precinct, 306 Carmody Rd, St. Lucia, QLD, 4067, Australia
| | - Jiri Stiller
- CSIRO Agriculture and Food, Queensland Biosciences Precinct, 306 Carmody Rd, St. Lucia, QLD, 4067, Australia
| | - Adam Healey
- HudsonAlpha Institute for Biotechnology, 601 Genome Way, Huntsville, AL, 35806, USA
| | | | - Karen S Aitken
- CSIRO Agriculture and Food, Queensland Biosciences Precinct, 306 Carmody Rd, St. Lucia, QLD, 4067, Australia.
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Khapilina O, Turzhanova A, Danilova A, Tumenbayeva A, Shevtsov V, Kotukhov Y, Kalendar R. Primer Binding Site (PBS) Profiling of Genetic Diversity of Natural Populations of Endemic Species Allium ledebourianum Schult. BIOTECH 2021; 10:23. [PMID: 35822797 PMCID: PMC9245474 DOI: 10.3390/biotech10040023] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/08/2021] [Revised: 08/25/2021] [Accepted: 10/11/2021] [Indexed: 11/20/2022] Open
Abstract
Endemic species are especially vulnerable to biodiversity loss caused by isolation or habitat specificity, small population size, and anthropogenic factors. Endemic species biodiversity analysis has a critically important global value for the development of conservation strategies. The rare onion Allium ledebourianum is a narrow-lined endemic species, with natural populations located in the extreme climatic conditions of the Kazakh Altai. A. ledebourianum populations are decreasing everywhere due to anthropogenic impact, and therefore, this species requires preservation and protection. Conservation of this rare species is associated with monitoring studies to investigate the genetic diversity of natural populations. Fundamental components of eukaryote genome include multiple classes of interspersed repeats. Various PCR-based DNA fingerprinting methods are used to detect chromosomal changes related to recombination processes of these interspersed elements. These methods are based on interspersed repeat sequences and are an effective approach for assessing the biological diversity of plants and their variability. We applied DNA profiling approaches based on conservative sequences of interspersed repeats to assess the genetic diversity of natural A. ledebourianum populations located in the territory of Kazakhstan Altai. The analysis of natural A. ledebourianum populations, carried out using the DNA profiling approach, allowed the effective differentiation of the populations and assessment of their genetic diversity. We used conservative sequences of tRNA primer binding sites (PBS) of the long-terminal repeat (LTR) retrotransposons as PCR primers. Amplification using the three most effective PBS primers generated 628 PCR amplicons, with an average of 209 amplicons. The average polymorphism level varied from 34% to 40% for all studied samples. Resolution analysis of the PBS primers showed all of them to have high or medium polymorphism levels, which varied from 0.763 to 0.965. Results of the molecular analysis of variance showed that the general biodiversity of A. ledebourianum populations is due to interpopulation (67%) and intrapopulation (33%) differences. The revealed genetic diversity was higher in the most distant population of A. ledebourianum LD64, located on the Sarymsakty ridge of Southern Altai. This is the first genetic diversity study of the endemic species A. ledebourianum using DNA profiling approaches. This work allowed us to collect new genetic data on the structure of A. ledebourianum populations in the Altai for subsequent development of preservation strategies to enhance the reproduction of this relict species. The results will be useful for the conservation and exploitation of this species, serving as the basis for further studies of its evolution and ecology.
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Affiliation(s)
- Oxana Khapilina
- National Center for Biotechnology, Korgalzhin Hwy 13/5, Nur-Sultan 010000, Kazakhstan; (A.T.); (A.T.); (V.S.)
| | - Ainur Turzhanova
- National Center for Biotechnology, Korgalzhin Hwy 13/5, Nur-Sultan 010000, Kazakhstan; (A.T.); (A.T.); (V.S.)
| | - Alevtina Danilova
- Altai Botanical Garden, Yermakova Str 1, Ridder 070000, Kazakhstan; (A.D.); (Y.K.)
| | - Asem Tumenbayeva
- National Center for Biotechnology, Korgalzhin Hwy 13/5, Nur-Sultan 010000, Kazakhstan; (A.T.); (A.T.); (V.S.)
| | - Vladislav Shevtsov
- National Center for Biotechnology, Korgalzhin Hwy 13/5, Nur-Sultan 010000, Kazakhstan; (A.T.); (A.T.); (V.S.)
| | - Yuri Kotukhov
- Altai Botanical Garden, Yermakova Str 1, Ridder 070000, Kazakhstan; (A.D.); (Y.K.)
| | - Ruslan Kalendar
- National Laboratory Astana, Nazarbayev University, Nur-Sultan 010000, Kazakhstan
- Helsinki Institute of Life Science HiLIFE, Biocenter 3, Viikinkaari 1, University of Helsinki, FI-00014 Helsinki, Finland
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Yañez-Santos AM, Paz RC, Paz-Sepúlveda PB, Urdampilleta JD. Full-length LTR retroelements in Capsicum annuum revealed a few species-specific family bursts with insertional preferences. Chromosome Res 2021; 29:261-284. [PMID: 34086192 DOI: 10.1007/s10577-021-09663-4] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/04/2020] [Revised: 05/04/2021] [Accepted: 05/06/2021] [Indexed: 01/01/2023]
Abstract
Capsicum annuum is a species that has undergone an expansion of the size of its genome caused mainly by the amplification of repetitive DNA sequences, including mobile genetic elements. Based on information obtained from sequencing the genome of pepper, the estimated fraction of retroelements is approximately 81%, and previous results revealed an important contribution of lineages derived from Gypsy superfamily. However, the dynamics of the retroelements in the C. annuum genome is poorly understood. In this way, the present work seeks to investigate the phylogenetic diversity and genomic abundance of the families of autonomous (complete and intact) LTR retroelements from C. annuum and inspect their distribution along its chromosomes. In total, we identified 1151 structurally full-length retroelements (340 Copia; 811 Gypsy) grouped in 124 phylogenetic families in the base of their retrotranscriptase. All the evolutive lineages of LTR retroelements identified in plants were present in pepper; however, three of them comprise 83% of the entire LTR retroelements population, the lineages Athila, Del/Tekay, and Ale/Retrofit. From them, only three families represent 70.8% of the total number of the identified retroelements. A massive family-specific wave of amplification of two of them occurred in the last 0.5 Mya (GypsyCa_16; CopiaCa_01), whereas the third is more ancient and occurred 3.0 Mya (GypsyCa_13). Fluorescent in situ hybridization performed with family and lineage-specific probes revealed contrasting patterns of chromosomal affinity. Our results provide a database of the populations LTR retroelements specific to C. annuum genome. The most abundant families were analyzed according to chromosome insertional preferences, suppling useful tools to the design of retroelement-based markers specific to the species.
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Affiliation(s)
- Anahí Mara Yañez-Santos
- CIGEOBIO (FCEFyN, UNSJ/CONICET), Av. Ignacio de la Roza 590 (Oeste), J5402DCS, Rivadavia, San Juan, Argentina.,Instituto Multidisciplinario de Biología Vegetal (IMBIV), Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET)-Universidad Nacional de Córdoba (UNC), Córdoba, Argentina
| | - Rosalía Cristina Paz
- CIGEOBIO (FCEFyN, UNSJ/CONICET), Av. Ignacio de la Roza 590 (Oeste), J5402DCS, Rivadavia, San Juan, Argentina.
| | - Paula Beatriz Paz-Sepúlveda
- Instituto Multidisciplinario de Biología Celular (IMBICE), Consejo Nacional de Investigaciones Científicas y Técnicas de la República Argentina (CONICET) - Comisión de Investigaciones Científicas (CIC) - Universidad Nacional de La Plata (UNLP), La Plata, Argentina
| | - Juan Domingo Urdampilleta
- Instituto Multidisciplinario de Biología Vegetal (IMBIV), Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET)-Universidad Nacional de Córdoba (UNC), Córdoba, Argentina
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6
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Orozco-Arias S, Jaimes PA, Candamil MS, Jiménez-Varón CF, Tabares-Soto R, Isaza G, Guyot R. InpactorDB: A Classified Lineage-Level Plant LTR Retrotransposon Reference Library for Free-Alignment Methods Based on Machine Learning. Genes (Basel) 2021; 12:genes12020190. [PMID: 33525408 PMCID: PMC7910972 DOI: 10.3390/genes12020190] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/30/2020] [Revised: 01/21/2021] [Accepted: 01/22/2021] [Indexed: 12/04/2022] Open
Abstract
Long terminal repeat (LTR) retrotransposons are mobile elements that constitute the major fraction of most plant genomes. The identification and annotation of these elements via bioinformatics approaches represent a major challenge in the era of massive plant genome sequencing. In addition to their involvement in genome size variation, LTR retrotransposons are also associated with the function and structure of different chromosomal regions and can alter the function of coding regions, among others. Several sequence databases of plant LTR retrotransposons are available for public access, such as PGSB and RepetDB, or restricted access such as Repbase. Although these databases are useful to identify LTR-RTs in new genomes by similarity, the elements of these databases are not fully classified to the lineage (also called family) level. Here, we present InpactorDB, a semi-curated dataset composed of 130,439 elements from 195 plant genomes (belonging to 108 plant species) classified to the lineage level. This dataset has been used to train two deep neural networks (i.e., one fully connected and one convolutional) for the rapid classification of these elements. In lineage-level classification approaches, we obtain up to 98% performance, indicated by the F1-score, precision and recall scores.
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Affiliation(s)
- Simon Orozco-Arias
- Department of Computer Science, Universidad Autónoma de Manizales, 170002 Manizales, Colombia; (P.A.J.); (M.S.C.)
- Department of Systems and Informatics, Universidad de Caldas, 170002 Manizales, Colombia;
- Correspondence: (S.O.-A.); (R.G.)
| | - Paula A. Jaimes
- Department of Computer Science, Universidad Autónoma de Manizales, 170002 Manizales, Colombia; (P.A.J.); (M.S.C.)
| | - Mariana S. Candamil
- Department of Computer Science, Universidad Autónoma de Manizales, 170002 Manizales, Colombia; (P.A.J.); (M.S.C.)
| | | | - Reinel Tabares-Soto
- Department of Electronics and Automation, Universidad Autónoma de Manizales, 170002 Manizales, Colombia;
| | - Gustavo Isaza
- Department of Systems and Informatics, Universidad de Caldas, 170002 Manizales, Colombia;
| | - Romain Guyot
- Department of Electronics and Automation, Universidad Autónoma de Manizales, 170002 Manizales, Colombia;
- Institut de Recherche pour le Développement, CIRAD, University of Montpellier, 34394 Montpellier, France
- Correspondence: (S.O.-A.); (R.G.)
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Maiwald S, Weber B, Seibt KM, Schmidt T, Heitkam T. The Cassandra retrotransposon landscape in sugar beet (Beta vulgaris) and related Amaranthaceae: recombination and re-shuffling lead to a high structural variability. ANNALS OF BOTANY 2021; 127:91-109. [PMID: 33009553 PMCID: PMC7750724 DOI: 10.1093/aob/mcaa176] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/28/2020] [Accepted: 09/28/2020] [Indexed: 05/26/2023]
Abstract
BACKGROUND AND AIMS Plant genomes contain many retrotransposons and their derivatives, which are subject to rapid sequence turnover. As non-autonomous retrotransposons do not encode any proteins, they experience reduced selective constraints leading to their diversification into multiple families, usually limited to a few closely related species. In contrast, the non-coding Cassandra terminal repeat retrotransposons in miniature (TRIMs) are widespread in many plants. Their hallmark is a conserved 5S rDNA-derived promoter in their long terminal repeats (LTRs). As sugar beet (Beta vulgaris) has a well-described LTR retrotransposon landscape, we aim to characterize TRIMs in beet and related genomes. METHODS We identified Cassandra retrotransposons in the sugar beet reference genome and characterized their structural relationships. Genomic organization, chromosomal localization, and distribution of Cassandra-TRIMs across the Amaranthaceae were verified by Southern and fluorescent in situ hybridization. KEY RESULTS All 638 Cassandra sequences in the sugar beet genome contain conserved LTRs and thus constitute a single family. Nevertheless, variable internal regions required a subdivision into two Cassandra subfamilies within B. vulgaris. The related Chenopodium quinoa harbours a third subfamily. These subfamilies vary in their distribution within Amaranthaceae genomes, their insertion times and the degree of silencing by small RNAs. Cassandra retrotransposons gave rise to many structural variants, such as solo LTRs or tandemly arranged Cassandra retrotransposons. These Cassandra derivatives point to an interplay of template switch and recombination processes - mechanisms that likely caused Cassandra's subfamily formation and diversification. CONCLUSIONS We traced the evolution of Cassandra in the Amaranthaceae and detected a considerable variability within the short internal regions, whereas the LTRs are strongly conserved in sequence and length. Presumably these hallmarks make Cassandra a prime target for unequal recombination, resulting in the observed structural diversity, an example of the impact of LTR-mediated evolutionary mechanisms on the host genome.
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Affiliation(s)
- Sophie Maiwald
- Institute of Botany, Technische Universität Dresden, Dresden, Germany
| | - Beatrice Weber
- Institute of Botany, Technische Universität Dresden, Dresden, Germany
| | - Kathrin M Seibt
- Institute of Botany, Technische Universität Dresden, Dresden, Germany
| | - Thomas Schmidt
- Institute of Botany, Technische Universität Dresden, Dresden, Germany
| | - Tony Heitkam
- Institute of Botany, Technische Universität Dresden, Dresden, Germany
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Structural and Functional Annotation of Transposable Elements Revealed a Potential Regulation of Genes Involved in Rubber Biosynthesis by TE-Derived siRNA Interference in Hevea brasiliensis. Int J Mol Sci 2020; 21:ijms21124220. [PMID: 32545790 PMCID: PMC7353026 DOI: 10.3390/ijms21124220] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/05/2020] [Revised: 06/09/2020] [Accepted: 06/11/2020] [Indexed: 12/14/2022] Open
Abstract
The natural rubber biosynthetic pathway is well described in Hevea, although the final stages of rubber elongation are still poorly understood. Small Rubber Particle Proteins and Rubber Elongation Factors (SRPPs and REFs) are proteins with major function in rubber particle formation and stabilization. Their corresponding genes are clustered on a scaffold1222 of the reference genomic sequence of the Hevea brasiliensis genome. Apart from gene expression by transcriptomic analyses, to date, no deep analyses have been carried out for the genomic environment of SRPPs and REFs loci. By integrative analyses on transposable element annotation, small RNAs production and gene expression, we analysed their role in the control of the transcription of rubber biosynthetic genes. The first in-depth annotation of TEs (Transposable Elements) and their capacity to produce TE-derived siRNAs (small interfering RNAs) is presented, only possible in the Hevea brasiliensis clone PB 260 for which all data are available. We observed that 11% of genes are located near TEs and their presence may interfere in their transcription at both genetic and epigenetic level. We hypothesized that the genomic environment of rubber biosynthesis genes has been shaped by TE and TE-derived siRNAs with possible transcriptional interference on their gene expression. We discussed possible functionalization of TEs as enhancers and as donors of alternative transcription start sites in promoter sequences, possibly through the modelling of genetic and epigenetic landscapes.
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Lancíková V, Žiarovská J. Inter-retrotransposon amplified polymorphism markers revealed long terminal repeat retrotransposon insertion polymorphism in flax cultivated on the experimental fields around Chernobyl. JOURNAL OF ENVIRONMENTAL SCIENCE AND HEALTH. PART A, TOXIC/HAZARDOUS SUBSTANCES & ENVIRONMENTAL ENGINEERING 2020; 55:957-963. [PMID: 32378983 DOI: 10.1080/10934529.2020.1760016] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/27/2020] [Revised: 04/14/2020] [Accepted: 04/16/2020] [Indexed: 06/11/2023]
Abstract
Ionizing radiation in environment comes from various natural and anthropogenic sources. The effect of radioactivity released after the CNPP (Chernobyl Nuclear Power Plant) on plant systems remains of great interest. Even now, more than three decades after the nuclear accident, the long-lived radionuclides represent a strong stress factor. Herein, the emphasis has been placed on analysis of genetic variability represented by activation of LTR (Long Terminal Repeat)-retrotransposons. Polymorphism in LTR-retrotransposon insertions has been investigated throughout the genome of two flax varieties, Kyivskyi and Bethune. For this purpose, two retrotransposon-based marker techniques, IRAP (Inter-Retrotransposon Amplified Polymorphism) and iPBS (inter-Primer Binding Site), have been employed. The hypothesis that chronic radioactive stress may induce mechanism of retransposition has been supported by the activation of FL9, FL11 and FL12 LTR-retrotransposons in flax seeds harvested from radioactive environment. Out of two retrotransposon-based approaches, IRAP appears to be more suitable for identification of LTR-retrotransposon polymorphism. Even though the LTR-retrotransposon polymorphism was identified, the results suggest the high level of plant adaptation in the radioactive Chernobyl area. However, it is not really surprising that plants developed an effective strategy to survive in radio-contaminated environment over the past 30 years.
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Affiliation(s)
- Veronika Lancíková
- Plant Science and Biodiversity Center, Institute of Plant Genetics and Biotechnology, Slovak Academy of Sciences, Nitra, Slovakia
| | - Jana Žiarovská
- Department of Genetics and Plant Breeding, Faculty of Agrobiology and Food Resources, Slovak University of Agriculture, Nitra, Slovakia
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10
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Souza GM, Van Sluys MA, Lembke CG, Lee H, Margarido GRA, Hotta CT, Gaiarsa JW, Diniz AL, Oliveira MDM, Ferreira SDS, Nishiyama MY, ten-Caten F, Ragagnin GT, Andrade PDM, de Souza RF, Nicastro GG, Pandya R, Kim C, Guo H, Durham AM, Carneiro MS, Zhang J, Zhang X, Zhang Q, Ming R, Schatz MC, Davidson B, Paterson AH, Heckerman D. Assembly of the 373k gene space of the polyploid sugarcane genome reveals reservoirs of functional diversity in the world's leading biomass crop. Gigascience 2019; 8:giz129. [PMID: 31782791 PMCID: PMC6884061 DOI: 10.1093/gigascience/giz129] [Citation(s) in RCA: 53] [Impact Index Per Article: 10.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/25/2019] [Revised: 05/23/2019] [Accepted: 10/08/2019] [Indexed: 11/29/2022] Open
Abstract
BACKGROUND Sugarcane cultivars are polyploid interspecific hybrids of giant genomes, typically with 10-13 sets of chromosomes from 2 Saccharum species. The ploidy, hybridity, and size of the genome, estimated to have >10 Gb, pose a challenge for sequencing. RESULTS Here we present a gene space assembly of SP80-3280, including 373,869 putative genes and their potential regulatory regions. The alignment of single-copy genes in diploid grasses to the putative genes indicates that we could resolve 2-6 (up to 15) putative homo(eo)logs that are 99.1% identical within their coding sequences. Dissimilarities increase in their regulatory regions, and gene promoter analysis shows differences in regulatory elements within gene families that are expressed in a species-specific manner. We exemplify these differences for sucrose synthase (SuSy) and phenylalanine ammonia-lyase (PAL), 2 gene families central to carbon partitioning. SP80-3280 has particular regulatory elements involved in sucrose synthesis not found in the ancestor Saccharum spontaneum. PAL regulatory elements are found in co-expressed genes related to fiber synthesis within gene networks defined during plant growth and maturation. Comparison with sorghum reveals predominantly bi-allelic variations in sugarcane, consistent with the formation of 2 "subgenomes" after their divergence ∼3.8-4.6 million years ago and reveals single-nucleotide variants that may underlie their differences. CONCLUSIONS This assembly represents a large step towards a whole-genome assembly of a commercial sugarcane cultivar. It includes a rich diversity of genes and homo(eo)logous resolution for a representative fraction of the gene space, relevant to improve biomass and food production.
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Affiliation(s)
- Glaucia Mendes Souza
- Departamento de Bioquímica, Instituto de Química, Universidade de São Paulo, Av. Prof. Lineu Prestes, 748, São Paulo, SP 05508-000, Brazil
| | - Marie-Anne Van Sluys
- Departamento de Botânica, Instituto de Biociências, Universidade de São Paulo, Rua do Matão, 277, São Paulo, SP 05508-090, Brazil
| | - Carolina Gimiliani Lembke
- Departamento de Bioquímica, Instituto de Química, Universidade de São Paulo, Av. Prof. Lineu Prestes, 748, São Paulo, SP 05508-000, Brazil
| | - Hayan Lee
- Cold Spring Harbor Laboratory, One Bungtown Road, Koch Building #1119, Cold Spring Harbor, NY11724, United States of America
- Department of Energy Joint Genome Institute, 2800 Mitchell Drive, Walnut Creek, CACA94598, United States of America
| | - Gabriel Rodrigues Alves Margarido
- Departamento de Genética, Escola Superior de Agricultura Luiz de Queiroz, Universidade de São Paulo, Avenida Pádua Dias, 11, Piracicaba, SP 13418-900, Brazil
| | - Carlos Takeshi Hotta
- Departamento de Bioquímica, Instituto de Química, Universidade de São Paulo, Av. Prof. Lineu Prestes, 748, São Paulo, SP 05508-000, Brazil
| | - Jonas Weissmann Gaiarsa
- Departamento de Botânica, Instituto de Biociências, Universidade de São Paulo, Rua do Matão, 277, São Paulo, SP 05508-090, Brazil
| | - Augusto Lima Diniz
- Departamento de Bioquímica, Instituto de Química, Universidade de São Paulo, Av. Prof. Lineu Prestes, 748, São Paulo, SP 05508-000, Brazil
| | - Mauro de Medeiros Oliveira
- Departamento de Bioquímica, Instituto de Química, Universidade de São Paulo, Av. Prof. Lineu Prestes, 748, São Paulo, SP 05508-000, Brazil
| | - Sávio de Siqueira Ferreira
- Departamento de Bioquímica, Instituto de Química, Universidade de São Paulo, Av. Prof. Lineu Prestes, 748, São Paulo, SP 05508-000, Brazil
- Departamento de Botânica, Instituto de Biociências, Universidade de São Paulo, Rua do Matão, 277, São Paulo, SP 05508-090, Brazil
| | - Milton Yutaka Nishiyama
- Departamento de Bioquímica, Instituto de Química, Universidade de São Paulo, Av. Prof. Lineu Prestes, 748, São Paulo, SP 05508-000, Brazil
- Laboratório Especial de Toxinologia Aplicada, Instituto Butantan, Av. Vital Brasil, 1500, São Paulo, SP05503-900, Brazil
| | - Felipe ten-Caten
- Departamento de Bioquímica, Instituto de Química, Universidade de São Paulo, Av. Prof. Lineu Prestes, 748, São Paulo, SP 05508-000, Brazil
| | - Geovani Tolfo Ragagnin
- Departamento de Botânica, Instituto de Biociências, Universidade de São Paulo, Rua do Matão, 277, São Paulo, SP 05508-090, Brazil
| | - Pablo de Morais Andrade
- Departamento de Bioquímica, Instituto de Química, Universidade de São Paulo, Av. Prof. Lineu Prestes, 748, São Paulo, SP 05508-000, Brazil
| | - Robson Francisco de Souza
- Departamento de Microbiologia, Instituto de Ciências Biomédicas, Universidade de São Paulo, Av.Professor Lineu Prestes, 1734, São Paulo, SP 05508-900, Brazil
| | - Gianlucca Gonçalves Nicastro
- Departamento de Microbiologia, Instituto de Ciências Biomédicas, Universidade de São Paulo, Av.Professor Lineu Prestes, 1734, São Paulo, SP 05508-900, Brazil
| | - Ravi Pandya
- Microsoft Research, One Microsoft Way, Redmond, WA 98052, United States of America
| | - Changsoo Kim
- Plant Genome Mapping Laboratory, University of Georgia, 120 Green Street, Athens, GA 30602-7223,United States of America
- Department of Crop Science, Chungnam National University, 99 Daehak Ro Yuseong Gu, Deajeon,34134, South Korea
| | - Hui Guo
- Plant Genome Mapping Laboratory, University of Georgia, 120 Green Street, Athens, GA 30602-7223,United States of America
| | - Alan Mitchell Durham
- Departamento de Ciências da Computação, Instituto de Matemática e Estatística, Universidade de São Paulo, Rua do Matão, 1010, São Paulo, SP 05508-090, Brazil
| | - Monalisa Sampaio Carneiro
- Departamento de Biotecnologia e Produção Vegetal e Animal, Centro de Ciências Agrárias, Universidade Federal de São Carlos, Rodovia Washington Luis km 235, Araras, SP 13.565-905, Brazil
| | - Jisen Zhang
- FAFU and UIUC-SIB Joint Center for Genomics and Biotechnology, Fujian Agriculture and Forestry University, Shangxiadian Road, Fuzhou 350002, Fujian, China
| | - Xingtan Zhang
- FAFU and UIUC-SIB Joint Center for Genomics and Biotechnology, Fujian Agriculture and Forestry University, Shangxiadian Road, Fuzhou 350002, Fujian, China
| | - Qing Zhang
- FAFU and UIUC-SIB Joint Center for Genomics and Biotechnology, Fujian Agriculture and Forestry University, Shangxiadian Road, Fuzhou 350002, Fujian, China
| | - Ray Ming
- FAFU and UIUC-SIB Joint Center for Genomics and Biotechnology, Fujian Agriculture and Forestry University, Shangxiadian Road, Fuzhou 350002, Fujian, China
- Department of Plant Biology, University of Illinois at Urbana-Champaign, 201 W. Gregory Dr. Urbana, Urbana, Illinois 61801, United States of America
| | - Michael C Schatz
- Cold Spring Harbor Laboratory, One Bungtown Road, Koch Building #1119, Cold Spring Harbor, NY11724, United States of America
- Departments of Computer Science and Biology, Johns Hopkins University, 3400 North Charles Street,Baltimore, MD 21218-2608, United States of America
| | - Bob Davidson
- Microsoft Research, One Microsoft Way, Redmond, WA 98052, United States of America
| | - Andrew H Paterson
- Plant Genome Mapping Laboratory, University of Georgia, 120 Green Street, Athens, GA 30602-7223,United States of America
| | - David Heckerman
- Microsoft Research, One Microsoft Way, Redmond, WA 98052, United States of America
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11
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da Costa ZP, Cauz-Santos LA, Ragagnin GT, Van Sluys MA, Dornelas MC, Berges H, de Mello Varani A, Vieira MLC. Transposable element discovery and characterization of LTR-retrotransposon evolutionary lineages in the tropical fruit species Passiflora edulis. Mol Biol Rep 2019; 46:6117-6133. [DOI: 10.1007/s11033-019-05047-4] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/14/2019] [Accepted: 08/28/2019] [Indexed: 12/23/2022]
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12
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Suguiyama VF, Vasconcelos LAB, Rossi MM, Biondo C, de Setta N. The population genetic structure approach adds new insights into the evolution of plant LTR retrotransposon lineages. PLoS One 2019; 14:e0214542. [PMID: 31107873 PMCID: PMC6527191 DOI: 10.1371/journal.pone.0214542] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/06/2018] [Accepted: 03/14/2019] [Indexed: 12/30/2022] Open
Abstract
Long terminal repeat retrotransposons (LTR-RTs) in plant genomes differ in abundance, structure and genomic distribution, reflecting the large number of evolutionary lineages. Elements within lineages can be considered populations, in which each element is an individual in its genomic environment. In this way, it would be reasonable to apply microevolutionary analyses to understand transposable element (TE) evolution, such as those used to study the genetic structure of natural populations. Here, we applied a Bayesian method to infer genetic structure of populations together with classical phylogenetic and dating tools to analyze LTR-RT evolution using the monocot Setaria italica as a model species. In contrast to a phylogeny, the Bayesian clusterization method identifies populations by assigning individuals to one or more clusters according to the most probabilistic scenario of admixture, based on genetic diversity patterns. In this work, each LTR-RT insertion was considered to be one individual and each LTR-RT lineage was considered to be a single species. Nine evolutionary lineages of LTR-RTs were identified in the S. italica genome that had different genetic structures with variable numbers of clusters and levels of admixture. Comprehensive analysis of the phylogenetic, clusterization and time of insertion data allowed us to hypothesize that admixed elements represent sequences that harbor ancestral polymorphic sequence signatures. In conclusion, application of microevolutionary concepts in genome evolution studies is suitable as a complementary approach to phylogenetic analyses to address the evolutionary history and functional features of TEs.
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Affiliation(s)
- Vanessa Fuentes Suguiyama
- Centro de Ciências Naturais e Humanas, Universidade Federal do ABC, São Bernardo do Campo, SP, Brazil
| | | | - Maria Magdalena Rossi
- Departamento de Botânica, Instituto de Biociências, Universidade de São Paulo, São Paulo, SP, Brazil
| | - Cibele Biondo
- Centro de Ciências Naturais e Humanas, Universidade Federal do ABC, São Bernardo do Campo, SP, Brazil
| | - Nathalia de Setta
- Centro de Ciências Naturais e Humanas, Universidade Federal do ABC, São Bernardo do Campo, SP, Brazil
- * E-mail:
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13
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Liu Y, Tahir Ul Qamar M, Feng JW, Ding Y, Wang S, Wu G, Ke L, Xu Q, Chen LL. Comparative analysis of miniature inverted-repeat transposable elements (MITEs) and long terminal repeat (LTR) retrotransposons in six Citrus species. BMC PLANT BIOLOGY 2019; 19:140. [PMID: 30987586 PMCID: PMC6466647 DOI: 10.1186/s12870-019-1757-3] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/03/2018] [Accepted: 04/04/2019] [Indexed: 05/22/2023]
Abstract
BACKGROUND Miniature inverted-repeat transposable elements (MITEs) and long terminal repeat (LTR) retrotransposons are ubiquitous in plants genomes, and highly important in their evolution and diversity. However, their mechanisms of insertion/amplification and roles in Citrus genome's evolution/diversity are still poorly understood. RESULTS To address this knowledge gap, we developed different computational pipelines to analyze, annotate and classify MITEs and LTR retrotransposons in six different sequenced Citrus species. We identified 62,010 full-length MITEs from 110 distinguished families. We observed MITEs tend to insert in gene related regions and enriched in promoters. We found that DTM63 is possibly an active Mutator-like MITE family in the traceable past and may still be active in Citrus. The insertion of MITEs resulted in massive polymorphisms and played an important role in Citrus genome diversity and gene structure variations. In addition, 6630 complete LTR retrotransposons and 13,371 solo-LTRs were identified. Among them, 12 LTR lineages separated before the differentiation of mono- and dicotyledonous plants. We observed insertion and deletion of LTR retrotransposons was accomplished with a dynamic balance, and their half-life in Citrus was ~ 1.8 million years. CONCLUSIONS These findings provide insights into MITEs and LTR retrotransposons and their roles in genome diversity in different Citrus genomes.
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Affiliation(s)
- Yan Liu
- National Key Laboratory of Crop Genetic Improvement, Huazhong Agricultural University, Wuhan, 430070, People's Republic of China
- Hubei Key Laboratory of Agricultural Bioinformatics, College of Informatics, Huazhong Agricultural University, Wuhan, 430070, People's Republic of China
| | - Muhammad Tahir Ul Qamar
- National Key Laboratory of Crop Genetic Improvement, Huazhong Agricultural University, Wuhan, 430070, People's Republic of China
- Hubei Key Laboratory of Agricultural Bioinformatics, College of Informatics, Huazhong Agricultural University, Wuhan, 430070, People's Republic of China
| | - Jia-Wu Feng
- National Key Laboratory of Crop Genetic Improvement, Huazhong Agricultural University, Wuhan, 430070, People's Republic of China
- Hubei Key Laboratory of Agricultural Bioinformatics, College of Informatics, Huazhong Agricultural University, Wuhan, 430070, People's Republic of China
| | - Yuduan Ding
- National Key Laboratory of Crop Genetic Improvement, Huazhong Agricultural University, Wuhan, 430070, People's Republic of China
- Hubei Key Laboratory of Agricultural Bioinformatics, College of Informatics, Huazhong Agricultural University, Wuhan, 430070, People's Republic of China
| | - Shuo Wang
- National Key Laboratory of Crop Genetic Improvement, Huazhong Agricultural University, Wuhan, 430070, People's Republic of China
- Hubei Key Laboratory of Agricultural Bioinformatics, College of Informatics, Huazhong Agricultural University, Wuhan, 430070, People's Republic of China
| | - Guizhi Wu
- Key Laboratory of Horticultural Plant Biology (Ministry of Education), Huazhong Agricultural University, Wuhan, 430070, People's Republic of China
| | - Lingjun Ke
- Key Laboratory of Horticultural Plant Biology (Ministry of Education), Huazhong Agricultural University, Wuhan, 430070, People's Republic of China
| | - Qiang Xu
- Key Laboratory of Horticultural Plant Biology (Ministry of Education), Huazhong Agricultural University, Wuhan, 430070, People's Republic of China
| | - Ling-Ling Chen
- National Key Laboratory of Crop Genetic Improvement, Huazhong Agricultural University, Wuhan, 430070, People's Republic of China.
- Hubei Key Laboratory of Agricultural Bioinformatics, College of Informatics, Huazhong Agricultural University, Wuhan, 430070, People's Republic of China.
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14
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Tavares EQP, De Souza AP, Romim GH, Grandis A, Plasencia A, Gaiarsa JW, Grima-Pettenati J, de Setta N, Van Sluys MA, Buckeridge MS. The control of endopolygalacturonase expression by the sugarcane RAV transcription factor during aerenchyma formation. JOURNAL OF EXPERIMENTAL BOTANY 2019; 70:497-506. [PMID: 30605523 PMCID: PMC6322575 DOI: 10.1093/jxb/ery362] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/04/2018] [Accepted: 10/10/2018] [Indexed: 05/22/2023]
Abstract
The development of lysigenous aerenchyma starts with cell expansion and degradation of pectin from the middle lamella, leading to cell wall modification, and culminating with cell separation. Here we report that nutritional starvation of sugarcane induced gene expression along sections of the first 5 cm of the root and between treatments. We selected two candidate genes: a RAV transcription factor, from the ethylene response factors superfamily, and an endopolygalacturonase (EPG), a glycosyl hydrolase related to homogalacturonan hydrolysis from the middle lamella. epg1 and rav1 transcriptional patterns suggest they are essential genes at the initial steps of pectin degradation during aerenchyma development in sugarcane. Due to the high complexity of the sugarcane genome, rav1 and epg1 were sequenced from 17 bacterial artificial chromosome clones containing hom(e)ologous genomic regions, and the sequences were compared with those of Sorghum bicolor. We used one hom(e)olog sequence from each gene for transactivation assays in tobacco. rav1 was shown to bind to the epg1 promoter, repressing β-glucuronidase activity. RAV repression upon epg1 transcription is the first reported link between ethylene regulation and pectin hydrolysis during aerenchyma formation. Our findings may help to elucidate cell wall degradation in sugarcane and therefore contribute to second-generation bioethanol production.
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Affiliation(s)
- Eveline Q P Tavares
- Departamento de Botânica, Instituto de Biociências, Universidade de São Paulo, SP, Brazil
| | - Amanda P De Souza
- Departamento de Botânica, Instituto de Biociências, Universidade de São Paulo, SP, Brazil
| | - Grayce H Romim
- Departamento de Botânica, Instituto de Biociências, Universidade de São Paulo, SP, Brazil
| | - Adriana Grandis
- Departamento de Botânica, Instituto de Biociências, Universidade de São Paulo, SP, Brazil
| | - Anna Plasencia
- LRSV, Laboratoire de Recherche en Sciences Végétales, UMR5546, Université Paul Sabatier Toulouse III/CNRS Castanet-Tolosan, France
| | - Jonas W Gaiarsa
- Departamento de Botânica, Instituto de Biociências, Universidade de São Paulo, SP, Brazil
- Tau Bioinformatics, São Paulo, SP, Brazil
| | - Jacqueline Grima-Pettenati
- LRSV, Laboratoire de Recherche en Sciences Végétales, UMR5546, Université Paul Sabatier Toulouse III/CNRS Castanet-Tolosan, France
| | - Nathalia de Setta
- Departamento de Botânica, Instituto de Biociências, Universidade de São Paulo, SP, Brazil
- Centro de Ciências Naturais e Humanas. Universidade Federal do ABC, São André, SP, Brazil
| | - Marie-Anne Van Sluys
- Departamento de Botânica, Instituto de Biociências, Universidade de São Paulo, SP, Brazil
| | - Marcos S Buckeridge
- Departamento de Botânica, Instituto de Biociências, Universidade de São Paulo, SP, Brazil
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15
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Sharma A, Song J, Lin Q, Singh R, Ramos N, Wang K, Zhang J, Ming R, Yu Q. Comparative Analysis of Homologous Sequences of Saccharum officinarum and Saccharum spontaneum Reveals Independent Polyploidization Events. FRONTIERS IN PLANT SCIENCE 2018; 9:1414. [PMID: 30319674 PMCID: PMC6167920 DOI: 10.3389/fpls.2018.01414] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 03/15/2018] [Accepted: 09/06/2018] [Indexed: 06/08/2023]
Abstract
Sugarcane (Saccharum spp. hybrids) is an economically important crop widely grown in tropical and subtropical regions for sugar and ethanol production. However, the large genome size, high ploidy level, interspecific hybridization and aneuploidy make sugarcane one of the most complex genomes and have long hampered genome research in sugarcane. Modern sugarcane cultivars are derived from interspecific hybridization between S. officinarum and S. spontaneum with 80-90% of the genome from S. officinarum and 10-20% of the genome from S. spontaneum. We constructed bacterial artificial chromosome (BAC) libraries of S. officinarum variety LA Purple (2n = 8x = 80) and S. spontaneum haploid clone AP85-441 (2n = 4x = 32), and selected and sequenced 97 BAC clones from the two Saccharum BAC libraries. A total of 5,847,280 bp sequence from S. officinarum and 5,011,570 bp from S. spontaneum were assembled and 749 gene models were annotated in these BACs. A relatively higher gene density and lower repeat content were observed in S. spontaneum BACs than in S. officinarum BACs. Comparative analysis of syntenic regions revealed a high degree of collinearity in genic regions between Saccharum and Sorghum bicolor and between S. officinarum and S. spontaneum. In the syntenic regions, S. spontaneum showed expansion relative to S. officinarum, and both S. officinarum and S. spontaneum showed expansion relative to sorghum. Among the 75 full-length LTR retrotransposons identified in the Saccharum BACs, none of them are older than 2.6 mys and no full-length LTR elements are shared between S. officinarum and S. spontaneum. In addition, divergence time estimated using a LTR junction marker and a syntenic gene shared by 3 S. officinarum and 1 S. spontaneum BACs revealed that the S. spontaneum intergenic region was distant to those from the 3 homologous regions in S. officinarum. Our results suggested that S. officinarum and S. spontaneum experienced at least two rounds of independent polyploidization in each lineage after their divergence from a common ancestor.
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Affiliation(s)
- Anupma Sharma
- Texas A&M AgriLife Research and Extension Center at Dallas, Texas A&M University System, Dallas, TX, United States
| | - Jinjin Song
- FAFU and UIUC-SIB Joint Center for Genomics and Biotechnology, Fujian Provincial Key Laboratory of Haixia Applied Plant Systems Biology, Key Laboratory of Genetics, Breeding and Multiple Utilization of Crops, Ministry of Education, Haixia Institute of Science and Technology, College of Life Science, Fujian Agriculture and Forestry University, Fuzhou, China
| | - Qingfan Lin
- Texas A&M AgriLife Research and Extension Center at Dallas, Texas A&M University System, Dallas, TX, United States
| | - Ratnesh Singh
- Texas A&M AgriLife Research and Extension Center at Dallas, Texas A&M University System, Dallas, TX, United States
| | - Ninfa Ramos
- Texas A&M AgriLife Research Center at Weslaco, Texas A&M University System, Weslaco, TX, United States
| | - Kai Wang
- FAFU and UIUC-SIB Joint Center for Genomics and Biotechnology, Fujian Provincial Key Laboratory of Haixia Applied Plant Systems Biology, Key Laboratory of Genetics, Breeding and Multiple Utilization of Crops, Ministry of Education, Haixia Institute of Science and Technology, College of Life Science, Fujian Agriculture and Forestry University, Fuzhou, China
| | - Jisen Zhang
- FAFU and UIUC-SIB Joint Center for Genomics and Biotechnology, Fujian Provincial Key Laboratory of Haixia Applied Plant Systems Biology, Key Laboratory of Genetics, Breeding and Multiple Utilization of Crops, Ministry of Education, Haixia Institute of Science and Technology, College of Life Science, Fujian Agriculture and Forestry University, Fuzhou, China
| | - Ray Ming
- FAFU and UIUC-SIB Joint Center for Genomics and Biotechnology, Fujian Provincial Key Laboratory of Haixia Applied Plant Systems Biology, Key Laboratory of Genetics, Breeding and Multiple Utilization of Crops, Ministry of Education, Haixia Institute of Science and Technology, College of Life Science, Fujian Agriculture and Forestry University, Fuzhou, China
- Department of Plant Biology, University of Illinois at Urbana–Champaign, Urbana, IL, United States
| | - Qingyi Yu
- Texas A&M AgriLife Research and Extension Center at Dallas, Texas A&M University System, Dallas, TX, United States
- FAFU and UIUC-SIB Joint Center for Genomics and Biotechnology, Fujian Provincial Key Laboratory of Haixia Applied Plant Systems Biology, Key Laboratory of Genetics, Breeding and Multiple Utilization of Crops, Ministry of Education, Haixia Institute of Science and Technology, College of Life Science, Fujian Agriculture and Forestry University, Fuzhou, China
- Department of Plant Pathology and Microbiology, Texas A&M University, College Station, TX, United States
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16
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Shrestha N, Weber PH, Burke SV, Wysocki WP, Duvall MR, Bujarski JJ. Next generation sequencing reveals packaging of host RNAs by brome mosaic virus. Virus Res 2018; 252:82-90. [PMID: 29753892 DOI: 10.1016/j.virusres.2018.05.011] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/09/2018] [Revised: 05/05/2018] [Accepted: 05/09/2018] [Indexed: 12/28/2022]
Abstract
Although RNA viruses evolved the mechanisms of specific encapsidation, miss-packaging of cellular RNAs has been reported in such RNA virus systems as flock house virus or cucumber necrosis virus. To find out if brome mosaic virus (BMV), a tripartite RNA virus, can package cellular RNAs, BMV was propagated in barley and in Nicotiana benthamiana hosts, purified by cesium chloride (CsCl) gradient ultracentrifugation followed by nuclease treatment to remove any contaminating cellular (host) RNAs. The extracted virion RNA was then sequenced by using next-generation sequencing (NGS RNA-Seq) with the Illumina protocol. Bioinformatic analysis revealed the content of host RNAs ranging from 0.07% for BMV extracted from barley to 0.10% for the virus extracted from N. benthamiana. The viruses from two sources appeared to co-encapsidate different patterns of host-RNAs, including ribosomal RNAs (rRNAs), messenger RNAs (mRNAs) but also mitochondrial and plastid RNAs and, interestingly, transposable elements, both transposons and retrotransposons. Our data reveal that BMV virions can carry host RNAs, having a potential to mediate horizontal gene transfer (HGT) in plants.
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Affiliation(s)
- N Shrestha
- Department of Biological Sciences and Plant Molecular and Bioinformatics Center, Northern Illinois University, DeKalb, IL 60115, USA
| | - P H Weber
- Department of Biological Sciences and Plant Molecular and Bioinformatics Center, Northern Illinois University, DeKalb, IL 60115, USA.
| | - S V Burke
- Department of Biological Sciences and Plant Molecular and Bioinformatics Center, Northern Illinois University, DeKalb, IL 60115, USA
| | - W P Wysocki
- Department of Biological Sciences and Plant Molecular and Bioinformatics Center, Northern Illinois University, DeKalb, IL 60115, USA.
| | - M R Duvall
- Department of Biological Sciences and Plant Molecular and Bioinformatics Center, Northern Illinois University, DeKalb, IL 60115, USA
| | - J J Bujarski
- Department of Biological Sciences and Plant Molecular and Bioinformatics Center, Northern Illinois University, DeKalb, IL 60115, USA; Institute of Bioorganic Chemistry, Polish Academy of Sciences, Noskowskiego 12/14, 61-704 Poznan, Poland.
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17
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Qiu F, Ungerer MC. Genomic abundance and transcriptional activity of diverse gypsy and copia long terminal repeat retrotransposons in three wild sunflower species. BMC PLANT BIOLOGY 2018; 18:6. [PMID: 29304730 PMCID: PMC5755311 DOI: 10.1186/s12870-017-1223-z] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/22/2017] [Accepted: 12/21/2017] [Indexed: 05/02/2023]
Abstract
BACKGROUND Long terminal repeat (LTR) retrotransposons are highly abundant in plant genomes and require transcriptional activity for their proliferative mode of replication. These sequences exist in plant genomes as diverse sublineages within the main element superfamilies (i.e., gypsy and copia). While transcriptional activity of these elements is increasingly recognized as a regular attribute of plant transcriptomes, it is currently unknown the extent to which different sublineages of these elements are transcriptionally active both within and across species. In the current report, we utilize next generation sequencing methods to examine genomic copy number abundance of diverse LTR retrotransposon sublineages and their corresponding levels of transcriptional activity in three diploid wild sunflower species, Helianthus agrestis, H. carnosus and H. porteri. RESULTS The diploid sunflower species under investigation differ in genome size 2.75-fold, with 2C values of 22.93 for H. agrestis, 12.31 for H. carnosus and 8.33 for H. porteri. The same diverse gypsy and copia sublineages of LTR retrotransposons were identified across species, but with gypsy sequences consistently more abundant than copia and with global gypsy sequence abundance positively correlated with nuclear genome size. Transcriptional activity was detected for multiple copia and gypsy sequences, with significantly higher activity levels detected for copia versus gypsy. Interestingly, of 11 elements identified as transcriptionally active, 5 exhibited detectable expression in all three species and 3 exhibited detectable expression in two species. CONCLUSIONS Combined analyses of LTR retrotransposon genomic abundance and transcriptional activity across three sunflower species provides novel insights into genome size evolution and transposable element dynamics in this group. Despite considerable variation in nuclear genome size among species, relatively conserved patterns of LTR retrotransposon transcriptional activity were observed, with a highly overlapping set of copia and gypsy sequences observed to be transcriptionally active across species. A higher proportion of copia versus gypsy elements were found to be transcriptionally active and these sequences also were expressed at higher levels.
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Affiliation(s)
- Fan Qiu
- Division of Biology, Kansas State University, Manhattan, KS, 66506, USA.
| | - Mark C Ungerer
- Division of Biology, Kansas State University, Manhattan, KS, 66506, USA
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18
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Paz RC, Kozaczek ME, Rosli HG, Andino NP, Sanchez-Puerta MV. Diversity, distribution and dynamics of full-length Copia and Gypsy LTR retroelements in Solanum lycopersicum. Genetica 2017; 145:417-430. [PMID: 28776161 DOI: 10.1007/s10709-017-9977-7] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/05/2017] [Accepted: 07/26/2017] [Indexed: 12/18/2022]
Abstract
Transposable elements are the most abundant components of plant genomes and can dramatically induce genetic changes and impact genome evolution. In the recently sequenced genome of tomato (Solanum lycopersicum), the estimated fraction of elements corresponding to retrotransposons is nearly 62%. Given that tomato is one of the most important vegetable crop cultivated and consumed worldwide, understanding retrotransposon dynamics can provide insight into its evolution and domestication processes. In this study, we performed a genome-wide in silico search of full-length LTR retroelements in the tomato nuclear genome and annotated 736 full-length Gypsy and Copia retroelements. The dispersion level across the 12 chromosomes, the diversity and tissue-specific expression of those elements were estimated. Phylogenetic analysis based on the retrotranscriptase region revealed the presence of 12 major lineages of LTR retroelements in the tomato genome. We identified 97 families, of which 77 and 20 belong to the superfamilies Copia and Gypsy, respectively. Each retroelement family was characterized according to their element size, relative frequencies and insertion time. These analyses represent a valuable resource for comparative genomics within the Solanaceae, transposon-tagging and for the design of cultivar-specific molecular markers in tomato.
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Affiliation(s)
- Rosalía Cristina Paz
- CIGEOBIO (FCEFyN, UNSJ/CONICET), Av. Ignacio de la Roza 590 (Oeste), J5402DCS, Rivadavia, San Juan, Argentina.
| | - Melisa Eliana Kozaczek
- Facultad de Ciencias Exactas, Químicas y Naturales, Universidad Nacional de Misiones, Posadas, Misiones, Argentina
| | - Hernán Guillermo Rosli
- Instituto de Fisiología Vegetal, INFIVE, Universidad Nacional de La Plata, CONICET, La Plata, Buenos Aires, Argentina
| | - Natalia Pilar Andino
- Facultad de Ciencias Exactas, Físicas y Naturales, Universidad Nacional de San Juan, San Juan, Argentina
| | - Maria Virginia Sanchez-Puerta
- IBAM, Universidad Nacional de Cuyo, CONICET, FCA and FCEN, Almirante Brown 500, M5528AHB, Chacras de Coria, Argentina
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Huang Y, Luo L, Hu X, Yu F, Yang Y, Deng Z, Wu J, Chen R, Zhang M. Characterization, Genomic Organization, Abundance, and Chromosomal Distribution of Ty1-copia Retrotransposons in Erianthus arundinaceus. FRONTIERS IN PLANT SCIENCE 2017; 8:924. [PMID: 28638390 PMCID: PMC5461294 DOI: 10.3389/fpls.2017.00924] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/15/2017] [Accepted: 05/17/2017] [Indexed: 06/16/2023]
Abstract
Erianthus arundinaceus is an important wild species of the genus Saccharum with many valuable traits. However, the composition and structure of its genome are largely unknown, which have hindered its utilization in sugarcane breeding and evolutionary research. Retrotransposons constitute an appreciable fraction of plant genomes and may have played a significant role in the evolution and sequence organization of genomes. In the current study, we investigate the phylogenetic diversity and genomic abundance of Ty1-copia retrotransposons for the first time and inspect their chromosomal distribution patterns in E. arundinaceus. In total, 70 Ty1-copia reverse transcriptase (RT) sequences with significant levels of heterogeneity were obtained. The phylogenetic analysis revealed these Ty1-copia retrotransposons were classified into four distinct evolutionary lineages (Tork/TAR, Tork/Angela, Retrofit/Ale, and Sire/Maximus). Dot-blot analysis showed estimated the total copy number of Ty1-copia retrotransposons to be about 4.5 × 103 in the E. arundinaceus genome, indicating they were a significant component. Fluorescence in situ hybridization revealed that Ty1-copia retrotransposons from the four lineages had strikingly similar patterns of chromosomal enrichment, being exclusively enriched in the subterminal heterochromatic regions of most E. arundinaceus chromosomes. This is the first clear evidence of the presence of Ty1-copia retrotransposons in the subterminal heterochromatin of E. arundinaceus. Altogether, these results promote the understanding of the diversification of Ty1-copia retrotransposons and shed light on their chromosomal distribution patterns in E. arundinaceus.
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Affiliation(s)
- Yongji Huang
- National Engineering Research Center for Sugarcane, Fujian Agriculture and Forestry UniversityFuzhou, China
| | - Ling Luo
- National Engineering Research Center for Sugarcane, Fujian Agriculture and Forestry UniversityFuzhou, China
| | - Xuguang Hu
- National Engineering Research Center for Sugarcane, Fujian Agriculture and Forestry UniversityFuzhou, China
| | - Fan Yu
- National Engineering Research Center for Sugarcane, Fujian Agriculture and Forestry UniversityFuzhou, China
| | - Yongqing Yang
- National Engineering Research Center for Sugarcane, Fujian Agriculture and Forestry UniversityFuzhou, China
| | - Zuhu Deng
- National Engineering Research Center for Sugarcane, Fujian Agriculture and Forestry UniversityFuzhou, China
- Guangxi Collaborative Innovation Center of Sugar Industries, Guangxi UniversityNanning, China
| | - Jiayun Wu
- Guangdong Key Laboratory of Sugarcane Improvement and BiorefineryGuangzhou, China
- Guangdong Provincial Bioengineering Institute, Guangzhou Sugarcane Industry Research InstituteGuangzhou, China
| | - Rukai Chen
- National Engineering Research Center for Sugarcane, Fujian Agriculture and Forestry UniversityFuzhou, China
| | - Muqing Zhang
- Guangxi Collaborative Innovation Center of Sugar Industries, Guangxi UniversityNanning, China
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20
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Ferrareze PAG, Streit RSA, Dos Santos FM, Schrank A, Kmetzsch L, Vainstein MH, Staats CC. sRNAs as possible regulators of retrotransposon activity in Cryptococcus gattii VGII. BMC Genomics 2017; 18:294. [PMID: 28403818 PMCID: PMC5389150 DOI: 10.1186/s12864-017-3688-4] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2017] [Accepted: 04/06/2017] [Indexed: 01/31/2023] Open
Abstract
Background The absence of Argonaute genes in the fungal pathogen Cryptococcus gattii R265 and other VGII strains indicates that yeasts of this genotype cannot have a functional RNAi pathway, an evolutionarily conserved gene silencing mechanism performed by small RNAs. The success of the R265 strain as a pathogen that caused the Pacific Northwest and Vancouver Island outbreaks may imply that RNAi machinery loss could be beneficial under certain circumstances during evolution. As a result, a hypermutant phenotype would be created with high rates of genome retrotransposition, for instance. This study therefore aimed to evaluate in silicio the effect of retrotransposons and their control mechanisms by small RNAs on genomic stability and synteny loss of C. gattii R265 through retrotransposons sequence comparison and orthology analysis with other 16 C. gattii genomic sequences available. Results Retrotransposon mining identified a higher sequence count to VGI genotype compared to VGII, VGIII, and VGIV. However, despite the lower retrotransposon number, VGII exhibited increased synteny loss and genome rearrangement events. RNA-Seq analysis indicated highly expressed retrotransposons as well as sRNA production. Conclusions Genome rearrangement and synteny loss may suggest a greater retrotransposon mobilization caused by RNAi pathway absence, but the effective presence of sRNAs that matches retrotransposon sequences means that an alternative retrotransposon silencing mechanism could be active in genomic integrity maintenance of C. gattii VGII strains. Electronic supplementary material The online version of this article (doi:10.1186/s12864-017-3688-4) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Patrícia Aline Gröhs Ferrareze
- Programa de Pós-Graduação em Biologia Celular e Molecular, Centro de Biotecnologia, Universidade Federal do Rio Grande do Sul (UFRGS), 91501-970, Porto Alegre, RS, Brazil
| | - Rodrigo Silva Araujo Streit
- Departamento de Biologia Molecular e Biotecnologia, Instituto de Biociências, Universidade Federal do Rio Grande do Sul (UFRGS), Porto Alegre, RS, Brazil
| | - Francine Melise Dos Santos
- Programa de Pós-Graduação em Biologia Celular e Molecular, Centro de Biotecnologia, Universidade Federal do Rio Grande do Sul (UFRGS), 91501-970, Porto Alegre, RS, Brazil
| | - Augusto Schrank
- Programa de Pós-Graduação em Biologia Celular e Molecular, Centro de Biotecnologia, Universidade Federal do Rio Grande do Sul (UFRGS), 91501-970, Porto Alegre, RS, Brazil.,Departamento de Biologia Molecular e Biotecnologia, Instituto de Biociências, Universidade Federal do Rio Grande do Sul (UFRGS), Porto Alegre, RS, Brazil
| | - Livia Kmetzsch
- Programa de Pós-Graduação em Biologia Celular e Molecular, Centro de Biotecnologia, Universidade Federal do Rio Grande do Sul (UFRGS), 91501-970, Porto Alegre, RS, Brazil.,Departamento de Biologia Molecular e Biotecnologia, Instituto de Biociências, Universidade Federal do Rio Grande do Sul (UFRGS), Porto Alegre, RS, Brazil
| | - Marilene Henning Vainstein
- Programa de Pós-Graduação em Biologia Celular e Molecular, Centro de Biotecnologia, Universidade Federal do Rio Grande do Sul (UFRGS), 91501-970, Porto Alegre, RS, Brazil.,Departamento de Biologia Molecular e Biotecnologia, Instituto de Biociências, Universidade Federal do Rio Grande do Sul (UFRGS), Porto Alegre, RS, Brazil
| | - Charley Christian Staats
- Programa de Pós-Graduação em Biologia Celular e Molecular, Centro de Biotecnologia, Universidade Federal do Rio Grande do Sul (UFRGS), 91501-970, Porto Alegre, RS, Brazil. .,Departamento de Biologia Molecular e Biotecnologia, Instituto de Biociências, Universidade Federal do Rio Grande do Sul (UFRGS), Porto Alegre, RS, Brazil.
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21
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Distribution of Divo in Coffea genomes, a poorly described family of angiosperm LTR-Retrotransposons. Mol Genet Genomics 2017; 292:741-754. [DOI: 10.1007/s00438-017-1308-2] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/26/2016] [Accepted: 03/07/2017] [Indexed: 12/12/2022]
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22
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Lwin AK, Bertolini E, Pè ME, Zuccolo A. Genomic skimming for identification of medium/highly abundant transposable elements in Arundo donax and Arundo plinii. Mol Genet Genomics 2016; 292:157-171. [PMID: 27778102 DOI: 10.1007/s00438-016-1263-3] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/08/2016] [Accepted: 10/17/2016] [Indexed: 11/29/2022]
Abstract
Transposable elements (TEs) are the most abundant genetic material for almost all eukaryotic genomes. Their effects on the host genomes range from an extensive size variation to the regulation of gene expression, altering gene function and creating new genes. Because of TEs pivotal contribute to the host genome structure and regulation, their identification and characterization provide a wealth of useful data for gaining an in-depth understanding of host genome functioning. The giant reed (Arundo donax) is a perennial rhizomatous C3 grass, octadecaploid, with an estimated nuclear genome size of 2744 Mbp. It is a promising feedstock for second-generation biofuels and biomethane production. To identify and characterize the most repetitive TEs in the genomes of A. donax and its ancestral A. plinii species, we carried out low-coverage whole genome shotgun sequencing for both species. Using a de novo repeat identification approach, 33,041 and 28,237 non-redundant repetitive sequences were identified and characterized in A. donax and A. plinii genomes, representing 37.55 and 31.68% of each genome, respectively. Comparative phylogenetic analyses, including the major TE classes identified in A. donax and A. plinii, together with rice and maize TE paralogs, were carried out to understand the evolutionary relationship of the most abundant TE classes. Highly conserved copies of RIRE1-like Ty1-Copia elements were discovered in two Arundo spp. in which they represented nearly 3% of each genomic sequence. We identified and characterized the medium/highly repetitive TEs in two unexplored polyploid genomes, thus generating useful information for the study of the genomic structure, composition, and functioning of these two non-model species. We provided a valuable resource that could be exploited in any effort aimed at sequencing and assembling these two genomes.
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Affiliation(s)
- Aung Kyaw Lwin
- Institute of Life Sciences, Scuola Superiore Sant'Anna, Piazza Martiri della Libertà, 33, 56127, Pisa, Italy.,Sugarcane Research and Seed Farm, Pyinmana, Nay Pyi Taw, Myanmar
| | - Edoardo Bertolini
- Institute of Life Sciences, Scuola Superiore Sant'Anna, Piazza Martiri della Libertà, 33, 56127, Pisa, Italy
| | - Mario Enrico Pè
- Institute of Life Sciences, Scuola Superiore Sant'Anna, Piazza Martiri della Libertà, 33, 56127, Pisa, Italy
| | - Andrea Zuccolo
- Institute of Life Sciences, Scuola Superiore Sant'Anna, Piazza Martiri della Libertà, 33, 56127, Pisa, Italy.
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23
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Isolation, characterization, and marker utility of KCRE1, a transcriptionally active Ty1/copia retrotransposon from Kandelia candel. Mol Genet Genomics 2016; 291:2031-2042. [DOI: 10.1007/s00438-016-1237-5] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/09/2015] [Accepted: 07/29/2016] [Indexed: 10/21/2022]
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24
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Ochoa Cruz EA, Cruz GMQ, Vieira AP, Van Sluys MA. Virus-like attachment sites as structural landmarks of plants retrotransposons. Mob DNA 2016; 7:14. [PMID: 27471551 PMCID: PMC4963935 DOI: 10.1186/s13100-016-0069-5] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/29/2016] [Accepted: 07/07/2016] [Indexed: 01/18/2023] Open
Abstract
BACKGROUND The genomic data available nowadays has enabled the study of repetitive sequences and their relationship to viruses. Among them, long terminal repeat retrotransposons (LTR-RTs) are the largest component of most plant genomes, the Gypsy and Copia superfamilies being the most common. Recently it has been found that Del lineage, an LTR-RT of Gypsy superfamily, has putative virus-like attachment (vl-att) sites. This signature, originally described for retroviruses, is recognized by retroviral integrase conferring specificity to the integration process. RESULTS Here we retrieved 26,092 putative complete LTR-RTs from 10 lineages found in 10 fully sequenced angiosperm genomes and found putative vl-att sites that are a conserved structural landmark across these genomes. Furthermore, we reveal that each plant genome has a distinguishable LTR-RT lineage amplification pattern that could be related to the vl-att sites diversity. We used these patterns to generate a specific quick-response (QR) code for each genome that could be used as a barcode of identification of plants in the future. CONCLUSIONS The universal distribution of vl-att sites represents a new structural feature common to plant LTR-RTs and retroviruses. This is an important finding that expands the information about the structural similarity between LTR-RT and retroviruses. We speculate that the sequence diversity of vl-att sites could be important for the life cycle of retrotransposons, as it was shown for retroviruses. All the structural vl-att site signatures are strong candidates for further functional studies. Moreover, this is the first identification of specific LTR-RT content and their amplification patterns in a large dataset of LTR-RT lineages and angiosperm genomes. These distribution patterns could be used in the future with biotechnological identification purposes.
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Affiliation(s)
- Edgar Andres Ochoa Cruz
- Departamento de Botânica, Instituto de Biociências (IB), Universidade de São Paulo (USP), 05508-090 São Paulo, SP Brasil
| | | | - Andréia Prata Vieira
- Departamento de Botânica, Instituto de Biociências (IB), Universidade de São Paulo (USP), 05508-090 São Paulo, SP Brasil
| | - Marie-Anne Van Sluys
- Departamento de Botânica, Instituto de Biociências (IB), Universidade de São Paulo (USP), 05508-090 São Paulo, SP Brasil
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25
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Mlinarec J, Franjević D, Harapin J, Besendorfer V. The impact of the Tekay chromoviral elements on genome organisation and evolution of Anemone s.l. (Ranunculaceae). PLANT BIOLOGY (STUTTGART, GERMANY) 2016; 18:332-347. [PMID: 26370195 DOI: 10.1111/plb.12393] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/14/2015] [Accepted: 09/10/2015] [Indexed: 06/05/2023]
Abstract
We studied the highly abundant chromoviral Tekay clade in species from three sister genera - Anemone, Pulsatilla and Hepatica (Ranunculaceae). With this clade, we performed a concomitant survey of its phylogenetic diversity, chromosomal organisation and transcriptional activity in Anemone s.l. in order to investigate dynamics of the Tekay elements at a finer scale than previously achieved in this or any other flowering clade. The phylogenetic tree built from Tekay sequences conformed to expected evolutionary relationships of the species; exceptions being A. nemorosa and A. sylvestris, which appeared more closely related that expected, and we invoke hybridisation events to explain the observed topology. The separation of elements into six clusters could be explained by episodic bursts of activity since divergence from a common ancestor at different points in their respective evolutionary histories. In Anemone s.l. the Tekay elements do not have a preferential position on chromosomes, i.e. they can have a: (i) centromeric/pericentromeric position; (ii) interstitial position in DAPI-positive AT-rich heterochromatic regions; can be (iii) dispersed throughout chromosomes; or even (iv) be absent from large heterochromatic blocks. Widespread transcriptional activity of the Tekay elements in Anemone s.l. taxa indicate that some copies of Tekay elements could still be active in this plant group, contributing to genome evolution and speciation within Anemone s.l. Identification of Tekay elements in Anemone s.l. provides valuable information for understanding how different localisation patterns might help to facilitate plant genome organisation in a structural and functional manner.
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Affiliation(s)
- J Mlinarec
- Division of Biology, Department of Molecular Biology, Faculty of Science, University of Zagreb, Zagreb, Croatia
| | - D Franjević
- Division of Biology, Zoology Department, Faculty of Science, University of Zagreb, Zagreb, Croatia
| | - J Harapin
- Division of Biology, Department of Molecular Biology, Faculty of Science, University of Zagreb, Zagreb, Croatia
| | - V Besendorfer
- Division of Biology, Department of Molecular Biology, Faculty of Science, University of Zagreb, Zagreb, Croatia
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26
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Susek K, Bielski WK, Hasterok R, Naganowska B, Wolko B. A First Glimpse of Wild Lupin Karyotype Variation As Revealed by Comparative Cytogenetic Mapping. FRONTIERS IN PLANT SCIENCE 2016; 7:1152. [PMID: 27516770 PMCID: PMC4964750 DOI: 10.3389/fpls.2016.01152] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/17/2016] [Accepted: 07/11/2016] [Indexed: 05/19/2023]
Abstract
Insight into plant genomes at the cytomolecular level provides useful information about their karyotype structure, enabling inferences about taxonomic relationships and evolutionary origins. The Old World lupins (OWL) demonstrate a high level of genomic diversification involving variation in chromosome numbers (2n = 32-52), basic chromosome numbers (x = 5-7, 9, 13) and in nuclear genome size (2C DNA = 0.97-2.68 pg). Lupins comprise both crop and wild species and provide an intriguing system to study karyotype evolution. In order to investigate lupin chromosome structure, heterologous FISH was used. Sixteen BACs that had been generated as chromosome markers for the reference species, Lupinus angustifolius, were used to identify chromosomes in the wild species and explore karyotype variation. While all "single-locus" in L. angustifolius, in the wild lupins these clones proved to be "single-locus," "single-locus" with additional signals, "repetitive" or had no detectable BAC-FISH signal. The diverse distribution of the clones in the targeted genomes suggests a complex evolution history, which possibly involved multiple chromosomal changes such as fusions/fissions and repetitive sequence amplification. Twelve BACs were sequenced and we found numerous transposable elements including DNA transposons as well as LTR and non-LTR retrotransposons with varying quantity and composition among the different lupin species. However, at this preliminary stage, no correlation was observed between the pattern of BAC-FISH signals and the repeat content in particular BACs. Here, we describe the first BAC-based chromosome-specific markers for the wild species: L. cosentinii, L. cryptanthus, L. pilosus, L. micranthus and one New World lupin, L. multiflorus. These BACs could constitute the basis for an assignment of the chromosomal and genetic maps of other lupins, e.g., L. albus and L. luteus. Moreover, we identified karyotype variation that helps illustrate the relationships between the lupins and the extensive cytological diversity within this group. In this study we premise that lupin genomes underwent at least two rounds of fusion and fission events resulting in the reduction in chromosome number from 2n = 52 through 2n = 40 to 2n = 32, followed by chromosome number increment to 2n = 42.
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Affiliation(s)
- Karolina Susek
- Department of Genomics, Institute of Plant Genetics, Polish Academy of SciencesPoznan, Poland
- *Correspondence: Karolina Susek
| | - Wojciech K. Bielski
- Department of Genomics, Institute of Plant Genetics, Polish Academy of SciencesPoznan, Poland
| | - Robert Hasterok
- Department of Plant Anatomy and Cytology, University of Silesia in KatowiceKatowice, Poland
| | - Barbara Naganowska
- Department of Genomics, Institute of Plant Genetics, Polish Academy of SciencesPoznan, Poland
| | - Bogdan Wolko
- Department of Genomics, Institute of Plant Genetics, Polish Academy of SciencesPoznan, Poland
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27
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Yin H, Du J, Wu J, Wei S, Xu Y, Tao S, Wu J, Zhang S. Genome-wide Annotation and Comparative Analysis of Long Terminal Repeat Retrotransposons between Pear Species of P. bretschneideri and P. Communis. Sci Rep 2015; 5:17644. [PMID: 26631625 PMCID: PMC4668562 DOI: 10.1038/srep17644] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/11/2015] [Accepted: 11/03/2015] [Indexed: 12/02/2022] Open
Abstract
Recent sequencing of the Oriental pear (P. bretschneideri Rehd.) genome and the availability of the draft genome sequence of Occidental pear (P. communis L.), has provided a good opportunity to characterize the abundance, distribution, timing, and evolution of long terminal repeat retrotransposons (LTR-RTs) in these two important fruit plants. Here, a total of 7247 LTR-RTs, which can be classified into 148 families, have been identified in the assembled Oriental pear genome. Unlike in other plant genomes, approximately 90% of these elements were found to be randomly distributed along the pear chromosomes. Further analysis revealed that the amplification timeframe of elements varies dramatically in different families, super-families and lineages, and the Copia-like elements have highest activity in the recent 0.5 million years (Mys). The data also showed that two genomes evolved with similar evolutionary rates after their split from the common ancestor ~0.77–1.66 million years ago (Mya). Overall, the data provided here will be a valuable resource for further investigating the impact of transposable elements on gene structure, expression, and epigenetic modification in the pear genomes.
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Affiliation(s)
- Hao Yin
- Center of Pear Engineering Technology Research, State Key Laboratory of Crop Genetics and Germplasm Enhancement, Nanjing Agricultural University, Nanjing 210095, Jiangsu, China
| | - Jianchang Du
- Institute of Biotechnology, Jiangsu Academy of Agricultural Sciences, Nanjing 210014, Jiangsu, China
| | - Jun Wu
- Center of Pear Engineering Technology Research, State Key Laboratory of Crop Genetics and Germplasm Enhancement, Nanjing Agricultural University, Nanjing 210095, Jiangsu, China
| | - Shuwei Wei
- Center of Pear Engineering Technology Research, State Key Laboratory of Crop Genetics and Germplasm Enhancement, Nanjing Agricultural University, Nanjing 210095, Jiangsu, China
| | - Yingxiu Xu
- Institute of Biotechnology, Jiangsu Academy of Agricultural Sciences, Nanjing 210014, Jiangsu, China
| | - Shutian Tao
- Center of Pear Engineering Technology Research, State Key Laboratory of Crop Genetics and Germplasm Enhancement, Nanjing Agricultural University, Nanjing 210095, Jiangsu, China
| | - Juyou Wu
- Center of Pear Engineering Technology Research, State Key Laboratory of Crop Genetics and Germplasm Enhancement, Nanjing Agricultural University, Nanjing 210095, Jiangsu, China
| | - Shaoling Zhang
- Center of Pear Engineering Technology Research, State Key Laboratory of Crop Genetics and Germplasm Enhancement, Nanjing Agricultural University, Nanjing 210095, Jiangsu, China
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28
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Marcon HS, Domingues DS, Silva JC, Borges RJ, Matioli FF, Fontes MRDM, Marino CL. Transcriptionally active LTR retrotransposons in Eucalyptus genus are differentially expressed and insertionally polymorphic. BMC PLANT BIOLOGY 2015; 15:198. [PMID: 26268941 PMCID: PMC4535378 DOI: 10.1186/s12870-015-0550-1] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/23/2015] [Accepted: 06/12/2015] [Indexed: 06/01/2023]
Abstract
BACKGROUND In Eucalyptus genus, studies on genome composition and transposable elements (TEs) are particularly scarce. Nearly half of the recently released Eucalyptus grandis genome is composed by retrotransposons and this data provides an important opportunity to understand TE dynamics in Eucalyptus genome and transcriptome. RESULTS We characterized nine families of transcriptionally active LTR retrotransposons from Copia and Gypsy superfamilies in Eucalyptus grandis genome and we depicted genomic distribution and copy number in two Eucalyptus species. We also evaluated genomic polymorphism and transcriptional profile in three organs of five Eucalyptus species. We observed contrasting genomic and transcriptional behavior in the same family among different species. RLC_egMax_1 was the most prevalent family and RLC_egAngela_1 was the family with the lowest copy number. Most families of both superfamilies have their insertions occurring <3 million years, except one Copia family, RLC_egBianca_1. Protein theoretical models suggest different properties between Copia and Gypsy domains. IRAP and REMAP markers suggested genomic polymorphisms among Eucalyptus species. Using EST analysis and qRT-PCRs, we observed transcriptional activity in several tissues and in all evaluated species. In some families, osmotic stress increases transcript values. CONCLUSION Our strategy was successful in isolating transcriptionally active retrotransposons in Eucalyptus, and each family has a particular genomic and transcriptional pattern. Overall, our results show that retrotransposon activity have differentially affected genome and transcriptome among Eucalyptus species.
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Affiliation(s)
- Helena Sanches Marcon
- Departamento de Genética, Instituto de Biociências, Universidade Estadual Paulista - UNESP, Botucatu, Brazil.
- Programa de Pós-graduação em Ciências Biológicas (Genética), Universidade Estadual Paulista - UNESP, Botucatu, Brazil.
| | - Douglas Silva Domingues
- Programa de Pós-graduação em Ciências Biológicas (Genética), Universidade Estadual Paulista - UNESP, Botucatu, Brazil.
- Departamento de Botânica, Instituto de Biociências, Universidade Estadual Paulista - UNESP, Rio Claro, Brazil.
| | - Juliana Costa Silva
- Plant Biotechnology Laboratory, Instituto Agronômico do Paraná - IAPAR, Londrina, Brazil.
| | - Rafael Junqueira Borges
- Programa de Pós-graduação em Ciências Biológicas (Genética), Universidade Estadual Paulista - UNESP, Botucatu, Brazil.
- Departamento de Física e Biofísica, Instituto de Biociências, Universidade Estadual Paulista - UNESP, Botucatu, Brazil and INCTTOX-CNPq, Brazil.
| | - Fábio Filippi Matioli
- Departamento de Física e Biofísica, Instituto de Biociências, Universidade Estadual Paulista - UNESP, Botucatu, Brazil and INCTTOX-CNPq, Brazil.
| | - Marcos Roberto de Mattos Fontes
- Programa de Pós-graduação em Ciências Biológicas (Genética), Universidade Estadual Paulista - UNESP, Botucatu, Brazil.
- Departamento de Física e Biofísica, Instituto de Biociências, Universidade Estadual Paulista - UNESP, Botucatu, Brazil and INCTTOX-CNPq, Brazil.
| | - Celso Luis Marino
- Departamento de Genética, Instituto de Biociências, Universidade Estadual Paulista - UNESP, Botucatu, Brazil.
- Programa de Pós-graduação em Ciências Biológicas (Genética), Universidade Estadual Paulista - UNESP, Botucatu, Brazil.
- Instituto de Biotecnologia da UNESP - IBTEC, Botucatu, Brazil.
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29
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Encapsidation of Host RNAs by Cucumber Necrosis Virus Coat Protein during both Agroinfiltration and Infection. J Virol 2015; 89:10748-61. [PMID: 26269190 DOI: 10.1128/jvi.01466-15] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/05/2015] [Accepted: 08/03/2015] [Indexed: 12/11/2022] Open
Abstract
UNLABELLED Next-generation sequence analysis of virus-like particles (VLPs) produced during agroinfiltration of cucumber necrosis virus (CNV) coat protein (CP) and of authentic CNV virions was conducted to assess if host RNAs can be encapsidated by CNV CP. VLPs containing host RNAs were found to be produced during agroinfiltration, accumulating to approximately 1/60 the level that CNV virions accumulated during infection. VLPs contained a variety of host RNA species, including the major rRNAs as well as cytoplasmic, chloroplast, and mitochondrial mRNAs. The most predominant host RNA species encapsidated in VLPs were chloroplast encoded, consistent with the efficient targeting of CNV CP to chloroplasts during agroinfiltration. Interestingly, droplet digital PCR analysis showed that the CNV CP mRNA expressed during agroinfiltration was the most efficiently encapsidated mRNA, suggesting that the CNV CP open reading frame may contain a high-affinity site or sites for CP binding and thus contribute to the specificity of CNV RNA encapsidation. Approximately 0.09% to 0.7% of the RNA derived from authentic CNV virions contained host RNA, with chloroplast RNA again being the most prominent species. This is consistent with our previous finding that a small proportion of CNV CP enters chloroplasts during the infection process and highlights the possibility that chloroplast targeting is a significant aspect of CNV infection. Remarkably, 6 to 8 of the top 10 most efficiently encapsidated nucleus-encoded RNAs in CNV virions correspond to retrotransposon or retrotransposon-like RNA sequences. Thus, CNV could potentially serve as a vehicle for horizontal transmission of retrotransposons to new hosts and thereby significantly influence genome evolution. IMPORTANCE Viruses predominantly encapsidate their own virus-related RNA species due to the possession of specific sequences and/or structures on viral RNA which serve as high-affinity binding sites for the coat protein. In this study, we show, using next-generation sequence analysis, that CNV also encapsidates host RNA species, which account for ∼0.1% of the RNA packaged in CNV particles. The encapsidated host RNAs predominantly include chloroplast RNAs, reinforcing previous observations that CNV CP enters chloroplasts during infection. Remarkably, the most abundantly encapsidated cytoplasmic mRNAs consisted of retrotransposon-like RNA sequences, similar to findings recently reported for flock house virus (A. Routh, T. Domitrovic, and J. E. Johnson, Proc Natl Acad Sci U S A 109:1907-1912, 2012). Encapsidation of retrotransposon sequences may contribute to their horizontal transmission should CNV virions carrying retrotransposons infect a new host. Such an event could lead to large-scale genomic changes in a naive plant host, thus facilitating host evolutionary novelty.
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Metcalfe CJ, Oliveira SG, Gaiarsa JW, Aitken KS, Carneiro MS, Zatti F, Van Sluys MA. Using quantitative PCR with retrotransposon-based insertion polymorphisms as markers in sugarcane. JOURNAL OF EXPERIMENTAL BOTANY 2015; 66:4239-50. [PMID: 26093024 PMCID: PMC4493790 DOI: 10.1093/jxb/erv283] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/09/2023]
Abstract
Sugarcane is the main source of the world's sugar and is becoming increasingly important as a source of biofuel. The highly polyploid and heterozygous nature of the sugarcane genome has meant that characterization of the genome has lagged behind that of other important crops. Here we developed a method using a combination of quantitative PCR with a transposable marker system to score the relative number of alleles with a transposable element (TE) present at a particular locus. We screened two genera closely related to Saccharum (Miscanthus and Erianthus), wild Saccharum, traditional cultivars, and 127 modern cultivars from Brazilian and Australian breeding programmes. We showed how this method could be used in various ways. First, we showed that the method could be extended to be used as part of a genotyping system. Secondly, the history of insertion and timing of the three TEs examined supports our current understanding of the evolution of the Saccharum complex. Thirdly, all three TEs were found in only one of the two main lineages leading to the modern sugarcane cultivars and are therefore the first TEs identified that could potentially be used as markers for Saccharum spontaneum.
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Affiliation(s)
- Cushla J Metcalfe
- GaTE-Lab, Departamento de Botânica, IBUSP, Universidade de São Paulo, rua do Matao 277, 05508-090, SP, Brazil
| | - Sarah G Oliveira
- GaTE-Lab, Departamento de Botânica, IBUSP, Universidade de São Paulo, rua do Matao 277, 05508-090, SP, Brazil
| | - Jonas W Gaiarsa
- GaTE-Lab, Departamento de Botânica, IBUSP, Universidade de São Paulo, rua do Matao 277, 05508-090, SP, Brazil
| | - Karen S Aitken
- CSIRO Agriculture Flagship, Queensland Bioscience Precinct, 306 Carmody Road, St Lucia, QLD 4072, Australia
| | - Monalisa S Carneiro
- Centro de Ciências Agrárias, Universidade Federal de São Carlos, Araras, 13600-970, SP, Brazil
| | - Fernanda Zatti
- Centro de Ciências Agrárias, Universidade Federal de São Carlos, Araras, 13600-970, SP, Brazil
| | - Marie-Anne Van Sluys
- GaTE-Lab, Departamento de Botânica, IBUSP, Universidade de São Paulo, rua do Matao 277, 05508-090, SP, Brazil
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de Setta N, Monteiro-Vitorello CB, Metcalfe CJ, Cruz GMQ, Del Bem LE, Vicentini R, Nogueira FTS, Campos RA, Nunes SL, Turrini PCG, Vieira AP, Ochoa Cruz EA, Corrêa TCS, Hotta CT, de Mello Varani A, Vautrin S, da Trindade AS, de Mendonça Vilela M, Lembke CG, Sato PM, de Andrade RF, Nishiyama MY, Cardoso-Silva CB, Scortecci KC, Garcia AAF, Carneiro MS, Kim C, Paterson AH, Bergès H, D'Hont A, de Souza AP, Souza GM, Vincentz M, Kitajima JP, Van Sluys MA. Building the sugarcane genome for biotechnology and identifying evolutionary trends. BMC Genomics 2014; 15:540. [PMID: 24984568 PMCID: PMC4122759 DOI: 10.1186/1471-2164-15-540] [Citation(s) in RCA: 78] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/17/2013] [Accepted: 06/19/2014] [Indexed: 01/24/2023] Open
Abstract
Background Sugarcane is the source of sugar in all tropical and subtropical countries and is becoming increasingly important for bio-based fuels. However, its large (10 Gb), polyploid, complex genome has hindered genome based breeding efforts. Here we release the largest and most diverse set of sugarcane genome sequences to date, as part of an on-going initiative to provide a sugarcane genomic information resource, with the ultimate goal of producing a gold standard genome. Results Three hundred and seventeen chiefly euchromatic BACs were sequenced. A reference set of one thousand four hundred manually-annotated protein-coding genes was generated. A small RNA collection and a RNA-seq library were used to explore expression patterns and the sRNA landscape. In the sucrose and starch metabolism pathway, 16 non-redundant enzyme-encoding genes were identified. One of the sucrose pathway genes, sucrose-6-phosphate phosphohydrolase, is duplicated in sugarcane and sorghum, but not in rice and maize. A diversity analysis of the s6pp duplication region revealed haplotype-structured sequence composition. Examination of hom(e)ologous loci indicate both sequence structural and sRNA landscape variation. A synteny analysis shows that the sugarcane genome has expanded relative to the sorghum genome, largely due to the presence of transposable elements and uncharacterized intergenic and intronic sequences. Conclusion This release of sugarcane genomic sequences will advance our understanding of sugarcane genetics and contribute to the development of molecular tools for breeding purposes and gene discovery. Electronic supplementary material The online version of this article (doi:10.1186/1471-2164-15-540) contains supplementary material, which is available to authorized users.
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Affiliation(s)
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | - Marie-Anne Van Sluys
- Departamento de Botânica - Instituto de Biociências, Universidade de São Paulo, Rua do Matão 277, São Paulo 05508-090, SP, Brazil.
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Cruz GMQ, Metcalfe CJ, de Setta N, Cruz EAO, Vieira AP, Medina R, Van Sluys MA. Virus-like attachment sites and plastic CpG islands:landmarks of diversity in plant Del retrotransposons. PLoS One 2014; 9:e97099. [PMID: 24849372 PMCID: PMC4029996 DOI: 10.1371/journal.pone.0097099] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/01/2014] [Accepted: 04/14/2014] [Indexed: 11/18/2022] Open
Abstract
Full-length Del elements from ten angiosperm genomes, 5 monocot and 5 dicot, were retrieved and putative attachment (att) sites were identified. In the 2432 Del elements, two types of U5 att sites and a single conserved type of U3 att site were identified. Retroviral att sites confer specificity to the integration process, different att sites types therefore implies lineage specificity. While some features are common to all Del elements, CpG island patterns within the LTRs were particular to lineage specific clusters. All eudicot copies grouped into one single clade while the monocots harbour a more diverse collection of elements. Furthermore, full-length Del elements and truncated copies were unevenly distributed amongst chromosomes. Elements of Del lineage are organized in plants into three clusters and each cluster is composed of elements with distinct LTR features. Our results suggest that the Del lineage efficiently amplified in the monocots and that one branch is probably a newly emerging sub-lineage. Finally, sequences in all groups are under purifying selection. These results show the LTR region is dynamic and important in the evolution of LTR-retrotransposons, we speculate that it is a trigger for retrotransposon diversification.
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Affiliation(s)
- Guilherme M. Q. Cruz
- Departamento de Botânica, Instituto de Biociências (IB), Universidade de São Paulo (USP), São Paulo, São Paulo, Brasil
| | - Cushla J. Metcalfe
- Departamento de Botânica, Instituto de Biociências (IB), Universidade de São Paulo (USP), São Paulo, São Paulo, Brasil
| | | | - Edgar A. O. Cruz
- Departamento de Botânica, Instituto de Biociências (IB), Universidade de São Paulo (USP), São Paulo, São Paulo, Brasil
| | - Andréia Prata Vieira
- Departamento de Botânica, Instituto de Biociências (IB), Universidade de São Paulo (USP), São Paulo, São Paulo, Brasil
| | - Rosario Medina
- Departamento de Botânica, Instituto de Biociências (IB), Universidade de São Paulo (USP), São Paulo, São Paulo, Brasil
| | - Marie-Anne Van Sluys
- Departamento de Botânica, Instituto de Biociências (IB), Universidade de São Paulo (USP), São Paulo, São Paulo, Brasil
- * E-mail:
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De novo assembly and transcriptome analysis of contrasting sugarcane varieties. PLoS One 2014; 9:e88462. [PMID: 24523899 PMCID: PMC3921171 DOI: 10.1371/journal.pone.0088462] [Citation(s) in RCA: 101] [Impact Index Per Article: 10.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/15/2013] [Accepted: 01/07/2014] [Indexed: 02/01/2023] Open
Abstract
Sugarcane is an important crop and a major source of sugar and alcohol. In this study, we performed de novo assembly and transcriptome annotation for six sugarcane genotypes involved in bi-parental crosses. The de novo assembly of the sugarcane transcriptome was performed using short reads generated using the Illumina RNA-Seq platform. We produced more than 400 million reads, which were assembled into 72,269 unigenes. Based on a similarity search, the unigenes showed significant similarity to more than 28,788 sorghum proteins, including a set of 5,272 unigenes that are not present in the public sugarcane EST databases; many of these unigenes are likely putative undescribed sugarcane genes. From this collection of unigenes, a large number of molecular markers were identified, including 5,106 simple sequence repeats (SSRs) and 708,125 single-nucleotide polymorphisms (SNPs). This new dataset will be a useful resource for future genetic and genomic studies in this species.
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de Souza MCP, Silva JN, Almeida C. Differential detection of transposable elements between Saccharum species. Genet Mol Biol 2013; 36:408-12. [PMID: 24130449 PMCID: PMC3795168 DOI: 10.1590/s1415-47572013005000030] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/10/2012] [Accepted: 05/03/2013] [Indexed: 11/22/2022] Open
Abstract
Cultivars of sugarcane (Saccharum) are hybrids between species S. officinarum (x = 10, 2n = 8x = 80) and S. spontaneum (x = 8, 2n = 5 – 16x = 40 – 128). These accessions have 100 to 130 chromosomes, 80–85% of which are derived from S. officinarum, 10–15% from S. spontaneum, and 5–10% are possible recombinants between the two genomes. The aim of this study was to analyze the repetition of DNA sequences in S. officinarum and S. spontaneum. For this purpose, genomic DNA from S. officinarum was digested with restriction enzymes and the fragments cloned. Sixty-eight fragments, approximately 500 bp, were cloned, sequenced and had their identity analyzed in NCBI, and in the rice, maize, and sorghum genome databases using BLAST. Twelve clones containing partial transposable elements, one single-copy control, one DNA repetitive clone control and two genome controls were analyzed by DNA hybridization on membrane, using genomic probes from S. officinarum and S. spontaneum. The hybridization experiment revealed that six TEs had a similar repetitive DNA pattern in the genomes of S. officinarum and S. spontaneum, while six TEs were more abundant in the genome of S. officinarum. We concluded that the species S. officinarum and S. spontaneum have differential accumulation LTR retrotransposon families, suggesting distinct insertion or modification patterns.
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Lee SI, Park KC, Son JH, Hwang YJ, Lim KB, Song YS, Kim JH, Kim NS. Isolation and characterization of novel Ty1-copia-like retrotransposons from lily. Genome 2013; 56:495-503. [DOI: 10.1139/gen-2013-0088] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
Abstract
Species of the genus Lilium are well known for their large genomes. Although expansion of noncoding repeated DNA is believed to account for this genome size, retroelement del Ty3-gypsy is the only one described so far in the genus Lilium. We isolated Ty1-copia elements from Lilium longiflorum and named them LIREs (lily retrotransposons). The long terminal repeats, primer binding site, and polypurine tract sequences are highly similar among the LIRE elements, indicating that they are in the same lineage. Although the protein-coding regions were highly decayed, the sequence motifs of the integrase, reverse transcriptase, and RNase H domains were identifiable as belonging to the order of Ty1-copia elements. Phylogenetic analysis and primer binding site sequences revealed that these elements belonged to the Ale lineage among the six lineages of plant Ty1-copia elements. Base substitutions in the long terminal repeats estimated that the integration times of the LIRE Ty1-copia elements were between 0.7 and 5.5 mya. In situ hybridization showed that the LIRE elements were present in all the chromosomes of L. longiflorum and L. lancifolium, but absent in centromeres, telomeres, and 45S rRNA sites in both species. The LIRE elements were present very abundantly in species of the genus Lilium, but absent in other genera of the family Liliaceae, implying that the LIRE elements might have contributed to the expansion of the genome in the genus Lilium.
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Affiliation(s)
- Sung-Il Lee
- BK21 Training Program, Department of Molecular Bioscience, Kangwon National University, Chuncheon, 200-701, Korea
- Department of Molecular Bioscience, Kangwon National University, Chuncheon, 200-701, Korea
| | - Kyong-Cheul Park
- Institute of Biosciences and Biotechnology, Kangwon National University, Chuncheon, 200-701, Korea
| | - Jae-Han Son
- BK21 Training Program, Department of Molecular Bioscience, Kangwon National University, Chuncheon, 200-701, Korea
- Department of Molecular Bioscience, Kangwon National University, Chuncheon, 200-701, Korea
| | - Youn-Jung Hwang
- Department of Horticulture, Kyungbook National University, Daegu, Korea
| | - Ki-Byung Lim
- Department of Horticulture, Kyungbook National University, Daegu, Korea
| | - Ye-Su Song
- Department of Horticulture, Kangwon National University, Chuncheon, 200-701, Korea
| | - Jong-Hwa Kim
- Department of Horticulture, Kangwon National University, Chuncheon, 200-701, Korea
| | - Nam-Soo Kim
- BK21 Training Program, Department of Molecular Bioscience, Kangwon National University, Chuncheon, 200-701, Korea
- Institute of Biosciences and Biotechnology, Kangwon National University, Chuncheon, 200-701, Korea
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Piednoël M, Carrete-Vega G, Renner SS. Characterization of the LTR retrotransposon repertoire of a plant clade of six diploid and one tetraploid species. THE PLANT JOURNAL : FOR CELL AND MOLECULAR BIOLOGY 2013; 75:699-709. [PMID: 23663083 DOI: 10.1111/tpj.12233] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/08/2013] [Accepted: 05/02/2013] [Indexed: 05/10/2023]
Abstract
Comparisons of closely related species are needed to understand the fine-scale dynamics of retrotransposon evolution in flowering plants. Towards this goal, we classified the long terminal repeat (LTR) retrotransposons from six diploid and one tetraploid species of Orobanchaceae. The study species are the autotrophic, non-parasitic Lindenbergia philippensis (as an out-group) and six closely related holoparasitic species of Orobanche [O. crenata, O. cumana, O. gracilis (tetraploid) and O. pancicii] and Phelipanche (P. lavandulacea and P. ramosa). All major plant LTR retrotransposon clades could be identified, and appear to be inherited from a common ancestor. Species of Orobanche, but not Phelipanche, are enriched in Ty3/Gypsy retrotransposons due to a diversification of elements, especially chromoviruses. This is particularly striking in O. gracilis, where tetraploidization seems to have contributed to the Ty3/Gypsy enrichment and led to the emergence of seven large species-specific families of chromoviruses. The preferential insertion of chromoviruses in heterochromatin via their chromodomains might have favored their diversification and enrichment. Our phylogenetic analyses of LTR retrotransposons from Orobanchaceae also revealed that the Bianca clade of Ty1/Copia and the SMART-related elements are much more widely distributed among angiosperms than previously known.
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Affiliation(s)
- Mathieu Piednoël
- Systematic Botany and Mycology, University of Munich (LMU), Munich, 80638, Germany.
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de Siqueira Ferreira S, Nishiyama MY, Paterson AH, Souza GM. Biofuel and energy crops: high-yield Saccharinae take center stage in the post-genomics era. Genome Biol 2013; 14:210. [PMID: 23805917 PMCID: PMC3707038 DOI: 10.1186/gb-2013-14-6-210] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023] Open
Abstract
The Saccharinae, especially sugarcane, Miscanthus and sorghum, present remarkable characteristics for bioenergy production. Biotechnology of these plants will be important for a sustainable feedstock supply. Herein, we review knowledge useful for their improvement and synergies gained by their parallel study.
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Affiliation(s)
- Savio de Siqueira Ferreira
- Departamento de Bioquímica, Instituto de Química, Universidade de São Paulo, Av. Prof. Lineu Prestes 748, 05508-000 São Paulo, SP, Brazil
| | - Milton Yutaka Nishiyama
- Departamento de Bioquímica, Instituto de Química, Universidade de São Paulo, Av. Prof. Lineu Prestes 748, 05508-000 São Paulo, SP, Brazil
| | - Andrew H Paterson
- Plant Genome Mapping Laboratory, University of Georgia, Athens, GA 30602, USA
| | - Glaucia Mendes Souza
- Departamento de Bioquímica, Instituto de Química, Universidade de São Paulo, Av. Prof. Lineu Prestes 748, 05508-000 São Paulo, SP, Brazil
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Ortiz-Morea FA, Vicentini R, Silva GF, Silva EM, Carrer H, Rodrigues AP, Nogueira FT. Global analysis of the sugarcane microtranscriptome reveals a unique composition of small RNAs associated with axillary bud outgrowth. JOURNAL OF EXPERIMENTAL BOTANY 2013; 64:2307-20. [PMID: 23564956 PMCID: PMC3654421 DOI: 10.1093/jxb/ert089] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/18/2023]
Abstract
Axillary bud outgrowth determines shoot architecture and is under the control of endogenous hormones and a fine-tuned gene-expression network, which probably includes small RNAs (sRNAs). Although it is well known that sRNAs act broadly in plant development, our understanding about their roles in vegetative bud outgrowth remains limited. Moreover, the expression profiles of microRNAs (miRNAs) and their targets within axillary buds are largely unknown. Here, we employed sRNA next-generation sequencing as well as computational and gene-expression analysis to identify and quantify sRNAs and their targets in vegetative axillary buds of the biofuel crop sugarcane (Saccharum spp.). Computational analysis allowed the identification of 26 conserved miRNA families and two putative novel miRNAs, as well as a number of trans-acting small interfering RNAs. sRNAs associated with transposable elements and protein-encoding genes were similarly represented in both inactive and developing bud libraries. Conversely, sequencing and quantitative reverse transcription-PCR results revealed that specific miRNAs were differentially expressed in developing buds, and some correlated negatively with the expression of their targets at specific stages of axillary bud development. For instance, the expression patterns of miR159 and its target GAMYB suggested that they may play roles in regulating abscisic acid-signalling pathways during sugarcane bud outgrowth. Our work reveals, for the first time, differences in the composition and expression profiles of diverse sRNAs and targets between inactive and developing vegetative buds that, together with the endogenous balance of specific hormones, may be important in regulating axillary bud outgrowth.
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Affiliation(s)
- Fausto A. Ortiz-Morea
- Centro de Biotecnologia Agricola (CEBTEC), Escola Superior de Agricultura ‘Luiz de Queiroz’, (ESALQ)/USP, Piracicaba, SP, Brazil
- Laboratory of Molecular Genetics of Plant Development, Department of Genetics, Instituto de Biociências, Universidade Estadual Paulista (UNESP), Distrito de Rubião Jr.,17 s/n. CEP 18618–970 Botucatu, SP, Brazil
- These authors contributed equally to this work
| | - Renato Vicentini
- Centro de Biologia Molecular e Engenharia Genetica (CBMEG), Universidade Estadual de Campinas, Campinas, SP, Brazil
- These authors contributed equally to this work
| | - Geraldo F.F. Silva
- Centro de Biotecnologia Agricola (CEBTEC), Escola Superior de Agricultura ‘Luiz de Queiroz’, (ESALQ)/USP, Piracicaba, SP, Brazil
- Laboratory of Molecular Genetics of Plant Development, Department of Genetics, Instituto de Biociências, Universidade Estadual Paulista (UNESP), Distrito de Rubião Jr.,17 s/n. CEP 18618–970 Botucatu, SP, Brazil
| | - Eder M. Silva
- Laboratory of Molecular Genetics of Plant Development, Department of Genetics, Instituto de Biociências, Universidade Estadual Paulista (UNESP), Distrito de Rubião Jr.,17 s/n. CEP 18618–970 Botucatu, SP, Brazil
| | - Helaine Carrer
- Centro de Biotecnologia Agricola (CEBTEC), Escola Superior de Agricultura ‘Luiz de Queiroz’, (ESALQ)/USP, Piracicaba, SP, Brazil
| | - Ana P. Rodrigues
- Laboratory of Molecular Genetics of Plant Development, Department of Genetics, Instituto de Biociências, Universidade Estadual Paulista (UNESP), Distrito de Rubião Jr.,17 s/n. CEP 18618–970 Botucatu, SP, Brazil
| | - Fabio T.S. Nogueira
- Centro de Biotecnologia Agricola (CEBTEC), Escola Superior de Agricultura ‘Luiz de Queiroz’, (ESALQ)/USP, Piracicaba, SP, Brazil
- Laboratory of Molecular Genetics of Plant Development, Department of Genetics, Instituto de Biociências, Universidade Estadual Paulista (UNESP), Distrito de Rubião Jr.,17 s/n. CEP 18618–970 Botucatu, SP, Brazil
- To whom correspondence should be addressed.
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[Identification and analysis methods of plant LTR retrotransposon sequences]. YI CHUAN = HEREDITAS 2012. [PMID: 23208147 DOI: 10.3724/sp.j.1005.2012.01491] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
Abstract
LTR retrotransposons are an important class of eukaryotic transposable elements, which are ubiquitous and highly heterogeneous in plant and play a major role in genome evolution of eukaryote. They are now extensively employed in gene function and genetic diversity analyses. Identification of LTR retrotransposons is the precondition for its application. Therefore, it has important theoretical significance and practical application value in studying identification and analysis methods LTR retrotransposon sequences. Bioinformatic software of the sequence analysis, according to the work principle, can be classified roughly into two types: sequence alignment and sequence identification of conserved domains. Alignment software, such as BLAST and DNAstar, produce the corresponding sequence information through comparison of sequence similarity; however, this kind of software cannot be applied for full length sequences. According to the principle, LTR retro-transposon sequence identification software can be roughly sorted into four types: de novo repeat discovery method, com-parative genomic method, homology-based method, and structure-based method. For example, LTR_Finder based on de novo repeat discovery method can accurately predict and annotate LTR retrotransposons for full length sequences; Repeat-Masker, which is based on homology-based method, can discover LTR retrotransposons by comparing the similarity with known sequences in the database. In this article, different methods of identification and analysis of retrotransposon se-quences were compared and analyzed, and a set of flow of LTR retrotransposons sequence analysis was summarized in order to provide the reference for LTR retrotransposons sequence analysis.
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Palhares AC, Rodrigues-Morais TB, Van Sluys MA, Domingues DS, Maccheroni W, Jordão H, Souza AP, Marconi TG, Mollinari M, Gazaffi R, Garcia AAF, Vieira MLC. A novel linkage map of sugarcane with evidence for clustering of retrotransposon-based markers. BMC Genet 2012; 13:51. [PMID: 22742069 PMCID: PMC3443450 DOI: 10.1186/1471-2156-13-51] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/21/2012] [Accepted: 06/13/2012] [Indexed: 12/27/2022] Open
Abstract
BACKGROUND The development of sugarcane as a sustainable crop has unlimited applications. The crop is one of the most economically viable for renewable energy production, and CO2 balance. Linkage maps are valuable tools for understanding genetic and genomic organization, particularly in sugarcane due to its complex polyploid genome of multispecific origins. The overall objective of our study was to construct a novel sugarcane linkage map, compiling AFLP and EST-SSR markers, and to generate data on the distribution of markers anchored to sequences of scIvana_1, a complete sugarcane transposable element, and member of the Copia superfamily. RESULTS The mapping population parents ('IAC66-6' and 'TUC71-7') contributed equally to polymorphisms, independent of marker type, and generated markers that were distributed into nearly the same number of co-segregation groups (or CGs). Bi-parentally inherited alleles provided the integration of 19 CGs. The marker number per CG ranged from two to 39. The total map length was 4,843.19 cM, with a marker density of 8.87 cM. Markers were assembled into 92 CGs that ranged in length from 1.14 to 404.72 cM, with an estimated average length of 52.64 cM. The greatest distance between two adjacent markers was 48.25 cM. The scIvana_1-based markers (56) were positioned on 21 CGs, but were not regularly distributed. Interestingly, the distance between adjacent scIvana_1-based markers was less than 5 cM, and was observed on five CGs, suggesting a clustered organization. CONCLUSIONS Results indicated the use of a NBS-profiling technique was efficient to develop retrotransposon-based markers in sugarcane. The simultaneous maximum-likelihood estimates of linkage and linkage phase based strategies confirmed the suitability of its approach to estimate linkage, and construct the linkage map. Interestingly, using our genetic data it was possible to calculate the number of retrotransposon scIvana_1 (~60) copies in the sugarcane genome, confirming previously reported molecular results. In addition, this research possibly will have indirect implications in crop economics e.g., productivity enhancement via QTL studies, as the mapping population parents differ in response to an important fungal disease.
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Affiliation(s)
- Alessandra C Palhares
- Departamento de Genética, Escola Superior de Agricultura “Luiz de Queiroz”, Universidade de São Paulo, 13418-900, Piracicaba, Brazil
| | - Taislene B Rodrigues-Morais
- Departamento de Genética, Escola Superior de Agricultura “Luiz de Queiroz”, Universidade de São Paulo, 13418-900, Piracicaba, Brazil
| | - Marie-Anne Van Sluys
- Departamento de Botânica, Instituto de Biociências, Universidade de São Paulo, 05508-090, São Paulo, Brazil
| | - Douglas S Domingues
- Departamento de Botânica, Instituto de Biociências, Universidade de São Paulo, 05508-090, São Paulo, Brazil
- Present address: Laboratório de Biotecnologia Vegetal, Instituto Agronômico do Paraná, 86047-902, Londrina, Brazil
| | - Walter Maccheroni
- CanaVialis/Monsanto Co, Condomínio Techno Park, 13069-380, Campinas, Brazil
- Present address: Companhia Vale do Rio Doce, 20020-900, Rio de Janeiro, Brazil
| | - Hamilton Jordão
- CanaVialis/Monsanto Co, Condomínio Techno Park, 13069-380, Campinas, Brazil
- Present address: Companhia Vale do Rio Doce, 20020-900, Rio de Janeiro, Brazil
| | - Anete P Souza
- Centro de Biologia Molecular e Engenharia Genética, Universidade Estadual de Campinas, 13083-875, Campinas, Brazil
| | - Thiago G Marconi
- Centro de Biologia Molecular e Engenharia Genética, Universidade Estadual de Campinas, 13083-875, Campinas, Brazil
| | - Marcelo Mollinari
- Departamento de Genética, Escola Superior de Agricultura “Luiz de Queiroz”, Universidade de São Paulo, 13418-900, Piracicaba, Brazil
| | - Rodrigo Gazaffi
- Departamento de Genética, Escola Superior de Agricultura “Luiz de Queiroz”, Universidade de São Paulo, 13418-900, Piracicaba, Brazil
| | - Antonio Augusto F Garcia
- Departamento de Genética, Escola Superior de Agricultura “Luiz de Queiroz”, Universidade de São Paulo, 13418-900, Piracicaba, Brazil
| | - Maria Lucia Carneiro Vieira
- Departamento de Genética, Escola Superior de Agricultura “Luiz de Queiroz”, Universidade de São Paulo, 13418-900, Piracicaba, Brazil
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de Setta N, Metcalfe CJ, Cruz GMQ, Ochoa EA, Van Sluys MA. Noise or Symphony: Comparative Evolutionary Analysis of Sugarcane Transposable Elements with Other Grasses. PLANT TRANSPOSABLE ELEMENTS 2012. [DOI: 10.1007/978-3-642-31842-9_10] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
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