Article (Scientific journals)
Differential retention of transposable element-derived sequences in outcrossing Arabidopsis genomes
Legrand, S; Caron, T; Maumus, S et al.
2019In Mobile DNA, 10, p. 30
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Abstract :
[en] Background: Transposable elements (TEs) are genomic parasites with major impacts on host genome architecture and host adaptation. A proper evaluation of their evolutionary significance has been hampered by the paucity of short scale phylogenetic comparisons between closely related species. Here, we characterized the dynamics of TE accumulation at the micro-evolutionary scale by comparing two closely related plant species, Arabidopsis lyrata and A. halleri. Results: Joint genome annotation in these two outcrossing species confirmed that both contain two distinct populations of TEs with either 'recent' or 'old' insertion histories. Identification of rare segregating insertions suggests that diverse TE families contribute to the ongoing dynamics of TE accumulation in the two species. Orthologous TE fragments (i.e. those that have been maintained in both species), tend to be located closer to genes than those that are retained in one species only. Compared to non-orthologous TE insertions, those that are orthologous tend to produce fewer short interfering RNAs, are less heavily methylated when found within or adjacent to genes and these tend to have lower expression levels. These findings suggest that long-term retention of TE insertions reflects their frequent acquisition of adaptive roles and/or the deleterious effects of removing nearly neutral TE insertions when they are close to genes. Conclusion: Our results indicate a rapid evolutionary dynamics of the TE landscape in these two outcrossing species, with an important input of a diverse set of new insertions with variable propensity to resist deletion. © 2019 The Author(s).
Disciplines :
Genetics & genetic processes
Author, co-author :
Legrand, S;  Univ. Lille, CNRS, UMR-Evo-Eco-Paleo, Lille, F-59000, France
Caron, T;  Univ. Lille, CNRS, UMR-Evo-Eco-Paleo, Lille, F-59000, France
Maumus, S;  URGI, INRA, Université Paris-Saclay, Versailles, 78026, France
Schvartzman, S;  Université de Liège - ULiège > Département des sciences de la vie > Génomique fonctionnelle et imagerie moléculaire végétale
Quadrana, L;  IBENS, Département de Biologie, Ecole Normale Supérieure, CNRS, PSL Research University, Paris, F-75005, France
Durand, E;  Univ. Lille, CNRS, UMR-Evo-Eco-Paleo, Lille, F-59000, France
Gallina, S;  Univ. Lille, CNRS, UMR-Evo-Eco-Paleo, Lille, F-59000, France
Pauwels, M;  Univ. Lille, CNRS, UMR-Evo-Eco-Paleo, Lille, F-59000, France
Mazoyer, C;  Univ. Lille, CNRS, UMR-Evo-Eco-Paleo, Lille, F-59000, France
Huyghe, L;  Univ. Lille, CNRS, UMR-Evo-Eco-Paleo, Lille, F-59000, France
Colot, V;  IBENS, Département de Biologie, Ecole Normale Supérieure, CNRS, PSL Research University, Paris, F-75005, France
Hanikenne, Marc  ;  Université de Liège - ULiège > Département des sciences de la vie > Génomique fonctionnelle et imagerie moléculaire végétale
Castric, V;  Univ. Lille, CNRS, UMR-Evo-Eco-Paleo, Lille, F-59000, France
More authors (3 more) Less
Language :
English
Title :
Differential retention of transposable element-derived sequences in outcrossing Arabidopsis genomes
Publication date :
2019
Journal title :
Mobile DNA
ISSN :
1759-8753
Publisher :
BioMed Central, United Kingdom
Volume :
10
Pages :
30
Peer reviewed :
Peer Reviewed verified by ORBi
Name of the research project :
ANR-18-CE02-0020-01; PDR-T.0206.13; Novelis: 648321
Funders :
CNRS - Centre National de la Recherche Scientifique
ANR - Agence Nationale de la Recherche
FEDER - Fonds Europ�en de D�veloppement R�gional
F.R.S.-FNRS - Fonds de la Recherche Scientifique
R�gion Hauts-de-France
ERC - European Research Council
ULi�ge - Universit� de Li�ge
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