Empirical evidence for large X-effects in animals with undifferentiated sex chromosomes.

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Serval ID
serval:BIB_ED8AF9E1AC65
Type
Article: article from journal or magazin.
Collection
Publications
Title
Empirical evidence for large X-effects in animals with undifferentiated sex chromosomes.
Journal
Scientific Reports
Author(s)
Dufresnes C., Majtyka T., Baird S.J., Gerchen J.F., Borzée A., Savary R., Ogielska M., Perrin N., Stöck M.
ISSN
2045-2322 (Electronic)
ISSN-L
2045-2322
Publication state
Published
Issued date
2016
Peer-reviewed
Oui
Volume
6
Pages
21029
Language
english
Abstract
Reproductive isolation is crucial for the process of speciation to progress. Sex chromosomes have been assigned a key role in driving reproductive isolation but empirical evidence from natural population processes has been restricted to organisms with degenerated sex chromosomes such as mammals and birds. Here we report restricted introgression at sex-linked compared to autosomal markers in a hybrid zone between two incipient species of European tree frog, Hyla arborea and H. orientalis, whose homologous X and Y sex chromosomes are undifferentiated. This large X-effect cannot result from the dominance or faster-X aspects of Haldane's rule, which are specific to degenerated sex chromosomes, but rather supports a role for faster-heterogametic-sex or faster-male evolutionary processes. Our data suggest a prominent contribution of undifferentiated sex chromosomes to speciation.

Keywords
Animals, Female, Male, Ranidae, Sex Differentiation/genetics, X Chromosome/genetics, Y Chromosome/genetics
Pubmed
Web of science
Open Access
Yes
Create date
15/01/2016 14:25
Last modification date
20/08/2019 17:15
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