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Dynamics of transposable element accumulation in the non-recombining regions of mating-type chromosomes in anther-smut fungi.
Duhamel, Marine; Hood, Michael E; Rodríguez de la Vega, Ricardo C; Giraud, Tatiana.
Afiliación
  • Duhamel M; Ecologie Systématique Evolution, IDEEV, CNRS, Université Paris-Saclay, AgroParisTech, Bâtiment 680, 12 route RD128, 91190, Gif-sur-Yvette, France. marine.c.duhamel@gmail.com.
  • Hood ME; Evolution der Pflanzen und Pilze, Ruhr-Universität Bochum, Universitätsstraße 150, 44780, Bochum, Germany. marine.c.duhamel@gmail.com.
  • Rodríguez de la Vega RC; Department of Biology, Amherst College, 01002-5000, Amherst, MA, USA.
  • Giraud T; Ecologie Systématique Evolution, IDEEV, CNRS, Université Paris-Saclay, AgroParisTech, Bâtiment 680, 12 route RD128, 91190, Gif-sur-Yvette, France.
Nat Commun ; 14(1): 5692, 2023 09 14.
Article en En | MEDLINE | ID: mdl-37709766
In the absence of recombination, the number of transposable elements (TEs) increases due to less efficient selection, but the dynamics of such TE accumulations are not well characterized. Leveraging a dataset of 21 independent events of recombination cessation of different ages in mating-type chromosomes of Microbotryum fungi, we show that TEs rapidly accumulated in regions lacking recombination, but that TE content reached a plateau at ca. 50% of occupied base pairs by 1.5 million years following recombination suppression. The same TE superfamilies have expanded in independently evolved non-recombining regions, in particular rolling-circle replication elements (Helitrons). Long-terminal repeat (LTR) retrotransposons of the Copia and Ty3 superfamilies also expanded, through transposition bursts (distinguished from gene conversion based on LTR divergence), with both non-recombining regions and autosomes affected, suggesting that non-recombining regions constitute TE reservoirs. This study improves our knowledge of genome evolution by showing that TEs can accumulate through bursts, following non-linear decelerating dynamics.
Asunto(s)

Texto completo: 1 Base de datos: MEDLINE Asunto principal: Reproducción / Elementos Transponibles de ADN Idioma: En Revista: Nat Commun Asunto de la revista: BIOLOGIA / CIENCIA Año: 2023 Tipo del documento: Article País de afiliación: Francia

Texto completo: 1 Base de datos: MEDLINE Asunto principal: Reproducción / Elementos Transponibles de ADN Idioma: En Revista: Nat Commun Asunto de la revista: BIOLOGIA / CIENCIA Año: 2023 Tipo del documento: Article País de afiliación: Francia