High-density linkage maps fail to detect any genetic component to sex determination in a Rana temporaria family.

Détails

ID Serval
serval:BIB_FD9533EC64FE
Type
Article: article d'un périodique ou d'un magazine.
Collection
Publications
Titre
High-density linkage maps fail to detect any genetic component to sex determination in a Rana temporaria family.
Périodique
Journal of Evolutionary Biology
Auteur(s)
Brelsford A., Rodrigues N., Perrin N.
ISSN
1420-9101 (Electronic)
ISSN-L
1010-061X
Statut éditorial
Publié
Date de publication
2016
Peer-reviewed
Oui
Volume
29
Numéro
1
Pages
220-225
Langue
anglais
Résumé
Sex chromosome differentiation in Rana temporaria varies strikingly among populations or families: whereas some males display well-differentiated Y haplotypes at microsatellite markers on linkage group 2 (LG2 ), others are genetically undistinguishable from females. We analysed with RADseq markers one family from a Swiss lowland population with no differentiated sex chromosomes, and where sibship analyses had failed to detect any association between the phenotypic sex of progeny and parental haplotypes. Offspring were reared in a common tank in outdoor conditions and sexed at the froglet stage. We could map a total of 2177 SNPs (1123 in the mother, 1054 in the father), recovering in both adults 13 linkage groups (= chromosome pairs) that were strongly syntenic to Xenopus tropicalis despite > 200 My divergence. Sexes differed strikingly in the localization of crossovers, which were uniformly distributed in the female but limited to chromosome ends in the male. None of the 2177 markers showed significant association with offspring sex. Considering the very high power of our analysis, we conclude that sex determination was not genetic in this family; which factors determined sex remain to be investigated.
Mots-clé
common frogs, epigenetic sex determination, heterochiasmy, linkage maps, RADseq, recombination rate, sex chromosomes.
Pubmed
Web of science
Création de la notice
01/09/2015 9:09
Dernière modification de la notice
20/08/2019 16:28
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