Orozco-Arias S., Dupeyron M., Gutierrez-Duque D., Tabares-Soto R., Guyot Romain. (2023). High nucleotide similarity of three Copia lineage LTR retrotransposons among plant genomes. Genome, 66, p. 51-61. ISSN 0831-2796.
Titre du document
High nucleotide similarity of three Copia lineage LTR retrotransposons among plant genomes
Orozco-Arias S., Dupeyron M., Gutierrez-Duque D., Tabares-Soto R., Guyot Romain
Source
Genome, 2023,
66, p. 51-61 ISSN 0831-2796
Transposable elements (TEs) are mobile elements found in the majority of eukaryotic genomes. TEs deeply impact the structure and evolution of chromosomes and can induce mutations affecting coding genes. In plants, the major group of TEs is long terminal repeat retrotransposons (LTR-RTs). They are classified into superfamilies (Gypsy, Copia) and subclassified into lineages. Horizontal transfer (HT), defined as the nonsexual transmission of genetic material between species, is a process allowing LTRRTs to invade a new genome. Although this phenomenon was considered rare, recent studies demonstrate numerous transfers of LTR-RTs. This study aims to determine which LTR-RT lineages are shared with high similarity among 69 plant genomes. We identified and classified 88 450 LTR-RTs and determined 143 cases of high similarities between pairs of genomes. Most of them involved three Copia lineages (Oryco/Ivana, Retrofit/Ale, and Tork/Tar/Ikeros). A detailed analysis of three cases of high similarities involving Tork/Tar/Ikeros group shows an uneven distribution in the phylogeny of the elements and incongruence with between phylogenetic trees topologies, indicating they could be originated from HTs. Overall, our results suggest that LTR-RT Copia lineages share outstanding similarity between distant species and may likely be involved in HT mechanisms more frequent than initially estimated.
Plan de classement
Sciences fondamentales / Techniques d'analyse et de recherche [020]
;
Sciences du monde végétal [076]
