A Comparison of Selective Pressures in Plant X-Linked and Autosomal Genes.

ABSTRACT: Selection is expected to work differently in autosomal and X-linked genes because of their ploidy difference and the exposure of recessive X-linked mutations to haploid selection in males. However, it is not clear whether these expectations apply to recently evolved sex chromosomes, where many genes retain functional X- and Y-linked gametologs. We took advantage of the recently evolved sex chromosomes in the plant Silene latifolia and its closely related species to compare the selective pressures between hemizygous and non-hemizygous X-linked genes as well as between X-linked genes and autosomal genes. Our analysis, based on over 1000 genes, demonstrated that, similar to animals, X-linked genes in Silene evolve significantly faster than autosomal genes—the so-called fas

SUBMITTER: Krasovec M 

PROVIDER: S-EPMC5977174 | biostudies-literature | 2018 May

REPOSITORIES: biostudies-literature