Range-wide sex-chromosome sequence similarity supports occasional XY recombination in European tree frogs (Hyla arborea).

ABSTRACT: In contrast with mammals and birds, most poikilothermic vertebrates feature structurally undifferentiated sex chromosomes, which may result either from frequent turnovers, or from occasional events of XY recombination. The latter mechanism was recently suggested to be responsible for sex-chromosome homomorphy in European tree frogs (Hyla arborea). However, no single case of male recombination has been identified in large-scale laboratory crosses, and populations from NW Europe consistently display sex-specific allelic frequencies with male-diagnostic alleles, suggesting the absence of recombination in their recent history. To address this apparent paradox, we extended the phylogeographic scope of investigations, by analyzing the sequences of three sex-linked markers throughout the whole sp

SUBMITTER: Dufresnes C 

PROVIDER: S-EPMC4043726 | biostudies-literature | 2014

REPOSITORIES: biostudies-literature