A rapid rate of sex-chromosome turnover and non-random transitions in true frogs.

Détails

Ressource 1Télécharger: Jeffries et al 2018 Nat Comm.pdf (1141.88 [Ko])
Etat: Public
Version: Final published version
ID Serval
serval:BIB_61D309216459
Type
Article: article d'un périodique ou d'un magazine.
Collection
Publications
Titre
A rapid rate of sex-chromosome turnover and non-random transitions in true frogs.
Périodique
Nature communications
Auteur(s)
Jeffries D.L., Lavanchy G., Sermier R., Sredl M.J., Miura I., Borzée A., Barrow L.N., Canestrelli D., Crochet P.A., Dufresnes C., Fu J., Ma W.J., Garcia C.M., Ghali K., Nicieza A.G., O'Donnell R.P., Rodrigues N., Romano A., Martínez-Solano Í., Stepanyan I., Zumbach S., Brelsford A., Perrin N.
ISSN
2041-1723 (Electronic)
ISSN-L
2041-1723
Statut éditorial
Publié
Date de publication
05/10/2018
Peer-reviewed
Oui
Volume
9
Numéro
1
Pages
4088
Langue
anglais
Notes
Publication types: Journal Article ; Research Support, Non-U.S. Gov't
Publication Status: epublish
Résumé
The canonical model of sex-chromosome evolution predicts that, as recombination is suppressed along sex chromosomes, gametologs will progressively differentiate, eventually becoming heteromorphic. However, there are numerous examples of homomorphic sex chromosomes across the tree of life. This homomorphy has been suggested to result from frequent sex-chromosome turnovers, yet we know little about which forces drive them. Here, we describe an extremely fast rate of turnover among 28 species of Ranidae. Transitions are not random, but converge on several chromosomes, potentially due to genes they harbour. Transitions also preserve the ancestral pattern of male heterogamety, in line with the 'hot-potato' model of sex-chromosome transitions, suggesting a key role for mutation-load accumulation in non-recombining genomic regions. The importance of mutation-load selection in frogs might result from the extreme heterochiasmy they exhibit, making frog sex chromosomes differentiate immediately from emergence and across their entire length.
Mots-clé
Animals, Anura/genetics, Biological Evolution, Sex Chromosomes, Sex Determination Processes
Pubmed
Web of science
Open Access
Oui
Création de la notice
31/08/2018 8:07
Dernière modification de la notice
20/08/2019 15:18
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