Ancient drainage networks mediated a large-scale genetic introgression in the East Asian freshwater snails.

ABSTRACT: Biogeography and genetic variation of freshwater organisms are influenced not only by current freshwater connections but also by past drainage networks. The Seto Inland Sea is a shallow enclosed sea in Japan, but geological evidence showed that a large freshwater drainage had intermittently appeared in this area between the late Pliocene and Pleistocene. Here, we demonstrated that this paleodrainage greatly affected the genetic variation of the East Asian freshwater snails, Semisulcospira spp. We found that the mtDNA haplotypes originated in the Lake Biwa endemic Semisulcospira species at the upstream side of the paleodrainage were frequently observed in the riverine Semisulcospira species at its downstream side. The genome-wide DNA and morphological analyses consisten

SUBMITTER: Miura O 

PROVIDER: S-EPMC7417214 | biostudies-literature | 2020 Aug

REPOSITORIES: biostudies-literature