Population genomics reveals a possible history of backcrossing and recombination in the gynogenetic fish Poecilia formosa.

ABSTRACT: Unisexual sperm-dependent vertebrates are of hybrid origins, rare, and predicted to be short-lived as a result of several challenges arising from their mode of reproduction. In particular, because of a lack of recombination, clonal species are predicted to have a low potential to respond to natural selection. However, many unisexual sperm-dependent species persist, and assessing the genetic diversity present in these species is fundamental to understanding how they avoid extinction. We used population genomic methods to assess genotypic variation within the unisexual fish Poecilia formosa. Measures of admixture and population differentiation, as well as clustering analyses, indicate that the genomes of individuals of P. formosa are admixed and intermediate between Poecilia latipinna and Po

SUBMITTER: Alberici da Barbiano L 

PROVIDER: S-EPMC3752203 | biostudies-literature | 2013 Aug

REPOSITORIES: biostudies-literature