Genomic Architecture of Hybrid Male Sterility in a Species Without Sex Chromosomes (Tigriopus californicus, Copepoda: Harpacticoida).

ABSTRACT: Sterility among hybrids is one of the most prevalent forms of reproductive isolation delineating species boundaries and is expressed disproportionately in heterogametic XY males. While hybrid male sterility (HMS) due to the "large X effect" is a well-recognized mechanism of reproductive isolation, it is less clear how HMS manifests in species that lack heteromorphic sex chromosomes. We evaluated differences in allele frequencies at approximately 460,000 SNPs between fertile and sterile F2 interpopulation male hybrids to characterize the genomic architecture of HMS in a species without sex chromosomes (Tigriopus californicus). We tested associations between HMS and mitochondrial-nuclear and/or nuclear-nuclear signatures of incompatibility. Genomic regions associated with HMS were concentrat

SUBMITTER: Olsen KC 

PROVIDER: S-EPMC10257490 | biostudies-literature | 2023 Jun

REPOSITORIES: biostudies-literature