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The rainbow trout genome provides novel insights into evolution after whole-genome duplication in vertebrates.

Abstract : Vertebrate evolution has been shaped by several rounds of whole-genome duplications (WGDs) that are often suggested to be associated with adaptive radiations and evolutionary innovations. Due to an additional round of WGD, the rainbow trout genome offers a unique opportunity to investigate the early evolutionary fate of a duplicated vertebrate genome. Here we show that after 100 million years of evolution the two ancestral subgenomes have remained extremely collinear, despite the loss of half of the duplicated protein-coding genes, mostly through pseudogenization. In striking contrast is the fate of miRNA genes that have almost all been retained as duplicated copies. The slow and stepwise rediploidization process characterized here challenges the current hypothesis that WGD is followed by massive and rapid genomic reorganizations and gene deletions.
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https://hal.archives-ouvertes.fr/hal-01193812
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Submitted on : Thursday, May 28, 2020 - 3:22:46 PM
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Camille Berthelot, Frédéric Brunet, Domitille Chalopin, Amélie Juanchich, Maria Bernard, et al.. The rainbow trout genome provides novel insights into evolution after whole-genome duplication in vertebrates.. Nature Communications, Nature Publishing Group, 2014, 5, pp.1-10. ⟨10.1038/ncomms4657⟩. ⟨hal-01193812⟩

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