Recombination is suppressed and variability reduced in a nascent Y chromosome.

Détails

ID Serval
serval:BIB_EFB45E4E3318
Type
Article: article d'un périodique ou d'un magazine.
Collection
Publications
Titre
Recombination is suppressed and variability reduced in a nascent Y chromosome.
Périodique
Journal of Evolutionary Biology
Auteur(s)
Berset-Brändli L., Jaquiéry J., Perrin N.
ISSN
1010-061X[print], 1010-061X[linking]
Statut éditorial
Publié
Date de publication
05/2007
Peer-reviewed
Oui
Volume
20
Numéro
3
Pages
1182-1188
Langue
anglais
Notes
Publication types: Journal Article ; Research Support, Non-U.S. Gov't
Publication Status: ppublish
Résumé
Several hypotheses have been elaborated to account for the evolutionary decay commonly observed in full-fledged Y chromosomes. Enhanced drift, background selection and selective sweeps, which are expected to result from reduced recombination, may all share responsibilities in the initial decay of proto-Y chromosomes, but little empirical information has been gathered so far. Here we take advantage of three markers that amplify on both of the morphologically undifferentiated sex chromosomes of the European tree frog (Hyla arborea) to show that recombination is suppressed in males (the heterogametic sex) but not in females. Accordingly, genetic variability is reduced on the Y, but in a way that can be accounted for by merely the number of chromosome copies per breeding pair, without the need to invoke background selection or selective sweeps.
Mots-clé
Animals, Anura/genetics, Female, Gene Frequency, Genetic Markers, Genetic Variation, Linkage Disequilibrium, Male, Recombination, Genetic, Sex Determination (Genetics), Y Chromosome
Pubmed
Web of science
Open Access
Oui
Création de la notice
24/01/2008 18:54
Dernière modification de la notice
09/05/2019 3:13
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