Doubling genome size without polyploidization: dynamics of retrotransposition-driven genomic expansions in Oryza australiensis, a wild relative of rice. Export

@article{citeulike:950275, abstract = {Retrotransposons are the main components of eukaryotic genomes, representing up to 80\% of some large plant genomes. These mobile elements transpose via a "copy and paste" mechanism, thus increasing their copy number while active. Their accumulation is now accepted as the main factor of genome size increase in higher eukaryotes, besides polyploidy. However, the dynamics of this process are poorly understood. In this study, we show that Oryza australiensis, a wild relative of the Asian cultivated rice O. sativa, has undergone recent bursts of three LTR-retrotransposon families. This genome has accumulated more than 90,000 retrotransposon copies during the last three million years, leading to a rapid twofold increase of its size. In addition, phenetic analyses of these retrotransposons clearly confirm that the genomic bursts occurred posterior to the radiation of the species. This provides direct evidence of retrotransposon-mediated variation of genome size within a plant genus.}, address = {Laboratoire G\'{e}nome et D\'{e}veloppement des Plantes, UMR 5096 CNRS-IRD, Universit\'{e} de Perpignan, Perpignan 66860, France.}, author = {Piegu, Benoit and Guyot, Romain and Picault, Nathalie and Roulin, Anne and Saniyal, Abhijit and Kim, Hyeran and Collura, Kristi and Brar, Darshan S. and Jackson, Scott and Wing, Rod A. and Panaud, Olivier}, citeulike-article-id = {950275}, citeulike-linkout-0 = {http://dx.doi.org/10.1101/gr.5290206}, citeulike-linkout-1 = {http://view.ncbi.nlm.nih.gov/pubmed/16963705}, citeulike-linkout-2 = {http://www.hubmed.org/display.cgi?uids=16963705}, doi = {10.1101/gr.5290206}, issn = {1088-9051}, journal = {Genome research}, keywords = {polyploidy, retrotransposon, rice, transposable\_element}, month = {October}, number = {10}, pages = {1262--1269}, posted-at = {2009-11-11 11:27:14}, priority = {2}, title = {Doubling genome size without polyploidization: dynamics of retrotransposition-driven genomic expansions in Oryza australiensis, a wild relative of rice.}, url = {http://dx.doi.org/10.1101/gr.5290206}, volume = {16}, year = {2006} }

TY - JOUR ID - citeulike:950275 L3 - citeulike-article-id:950275 N2 - Retrotransposons are the main components of eukaryotic genomes, representing up to 80% of some large plant genomes. These mobile elements transpose via a "copy and paste" mechanism, thus increasing their copy number while active. Their accumulation is now accepted as the main factor of genome size increase in higher eukaryotes, besides polyploidy. However, the dynamics of this process are poorly understood. In this study, we show that Oryza australiensis, a wild relative of the Asian cultivated rice O. sativa, has undergone recent bursts of three LTR-retrotransposon families. This genome has accumulated more than 90,000 retrotransposon copies during the last three million years, leading to a rapid twofold increase of its size. In addition, phenetic analyses of these retrotransposons clearly confirm that the genomic bursts occurred posterior to the radiation of the species. This provides direct evidence of retrotransposon-mediated variation of genome size within a plant genus. IS - 10 JF - Genome research SN - 1088-9051 AD - Laboratoire Génome et Développement des Plantes, UMR 5096 CNRS-IRD, Université de Perpignan, Perpignan 66860, France. EP - 1269 TI - Doubling genome size without polyploidization: dynamics of retrotransposition-driven genomic expansions in Oryza australiensis, a wild relative of rice. VL - 16 SP - 1262 KW - polyploidy KW - retrotransposon KW - rice KW - transposable_element AU - Piegu, Benoit AU - Guyot, Romain AU - Picault, Nathalie AU - Roulin, Anne AU - Saniyal, Abhijit AU - Kim, Hyeran AU - Collura, Kristi AU - Brar, Darshan AU - Jackson, Scott AU - Wing, Rod AU - Panaud, Olivier PY - 2006/10// UR - http://dx.doi.org/10.1101/gr.5290206 ER -