The flow of antimicrobial peptide genes through a genetic barrier between Mytilus edulis and M. galloprovincialis.

We studied the population genetics of two antimicrobial peptide (AMP) loci, called Mytilin B and Mytilus galloprovincialis defensin 2 (MGD2), in the secondary contact mosaic hybrid zone between Mytilus edulis and M. galloprovincialis. The isolation period between the two species was estimated to be approximately 1 million years (range, 0.

Genetic hitchhiking in a subdivided population of Mytilus edulis.

Background: Few models of genetic hitchhiking in subdivided populations have been developed and the rarity of empirical examples is even more striking. We here provide evidences of genetic hitchhiking in a subdivided population of the marine mussel Mytilus edulis. In the Bay of Biscay (France), a patch of M.