Recent gene-capture on the UV sex chromosomes of the moss Ceratodon purpureus.

ABSTRACT: Sex chromosomes evolve from ordinary autosomes through the expansion and subsequent degeneration of a region of suppressed recombination that is inherited through one sex. Here we investigate the relative timing of these processes in the UV sex chromosomes of the moss Ceratodon purpureus using molecular population genetic analyses of eight newly discovered sex-linked loci. In this system, recombination is suppressed on both the female-transmitted (U) sex chromosome and the male-transmitted (V) chromosome. Genes on both chromosomes therefore should show the deleterious effects of suppressed recombination and sex-limited transmission, while purifying selection should maintain homologs of genes essential for both sexes on both sex chromosomes. Based on analyses of eight sex-linked loci, we sh

SUBMITTER: McDaniel SF 

PROVIDER: S-EPMC3801428 | biostudies-literature | 2013 Oct

REPOSITORIES: biostudies-literature