Mobilization of retrotransposons as a cause of chromosomal diversification and rapid speciation: the case for the Antarctic teleost genus Trematomus

J. Auvinet (1, 2) , P. Graça (3) , L. Belkadi (4) , L. Petit (5) , E. Bonnivard (3) , Agnès Dettaï (2) , H William Detrich (6) , C. Ozouf-Costaz (3) , Dominique Higuet (3)

1 Evolution Paris Seine
2 ISYEB - Institut de Systématique, Evolution, Biodiversité
3 Evolution Paris-Seine
4 Signalisation et Pathogénèse
5 IBPS-IP - Imagerie Cellulaire et Cytométrie de Flux [IBPS]
6 Northeastern University's Marine Science Center

The importance of transposable elements (TEs) in the genomic remodeling and chromosomal rearrangements that accompany lineage diversification in vertebrates remains the subject of debate. The major impediment to understanding the roles of TEs in genome evolution is the lack of comparative and integrative analyses on complete taxonomic groups. To help overcome this problem, we have focused on the Antarctic teleost genus Trematomus (Notothenioidei: Nototheniidae), as they experienced rapid speciation accompanied by dramatic chromosomal diversity. Here we apply a multi-strategy approach to determine the role of large-scale TE mobilization in chromosomal diversification within Trematomus species.

Mots clés: Chomosomal rearrangements; DIRS1 insertion hot spots; FISH; Nototheniidae; Retrotransposons; Speciation; Trematomus

Domaines: Evolution [q-bio.PE]

J. Auvinet, P. Graça, L. Belkadi, L. Petit, E. Bonnivard, et al.. Mobilization of retrotransposons as a cause of chromosomal diversification and rapid speciation: the case for the Antarctic teleost genus Trematomus. BMC Genomics, 2018, 19 (1), pp.339. ⟨10.1186/s12864-018-4714-x⟩. ⟨hal-01921023⟩