Long distance linkage disequilibrium and limited hybridization suggest cryptic speciation in atlantic cod.

ABSTRACT: Hybrid zones provide unprecedented opportunity for the study of the evolution of reproductive isolation, and the extent of hybridization across individuals and genomes can illuminate the degree of isolation. We examine patterns of interchromosomal linkage disequilibrium (ILD) and the presence of hybridization in Atlantic cod, Gadus morhua, in previously identified hybrid zones in the North Atlantic. Here, previously identified clinal loci were mapped to the cod genome with most (∼70%) occurring in or associated with (<5 kb) coding regions representing a diverse array of possible functions and pathways. Despite the observation that clinal loci were distributed across three linkage groups, elevated ILD was observed among all groups of clinal loci and strongest in comparisons involving a regi

SUBMITTER: Bradbury IR 

PROVIDER: S-EPMC4178228 | biostudies-literature | 2014

REPOSITORIES: biostudies-literature