Improved Reference Genome Uncovers Novel Sex-Linked Regions in the Guppy (Poecilia reticulata).

ABSTRACT: Theory predicts that the sexes can achieve greater fitness if loci with sexually antagonistic polymorphisms become linked to the sex determining loci, and this can favor the spread of reduced recombination around sex determining regions. Given that sex-linked regions are frequently repetitive and highly heterozygous, few complete Y chromosome assemblies are available to test these ideas. The guppy system (Poecilia reticulata) has long been invoked as an example of sex chromosome formation resulting from sexual conflict. Early genetics studies revealed that male color patterning genes are mostly but not entirely Y-linked, and that X-linkage may be most common in low-predation populations. More recent population genomic studies of guppies have reached varying conclusions about the size and p

SUBMITTER: Fraser BA 

PROVIDER: S-EPMC7643365 | biostudies-literature | 2020 Oct

REPOSITORIES: biostudies-literature