Phylogeography of the freshwater mussel species Lasmigona costata : testing post-glacial colonization hypotheses

摘要: Understanding genetic diversity across large spatial scales helps to reveal patterns of population structure. Mitochondrial DNA sequences and microsatellite loci were used analyze the phylogeography a common unionid species (Lasmigona costata) from Laurentian Great Lakes historically connected river drainages. Phylogeographic assessed determine colonization routes into following glacial recession. A suite seven genotyped fragment mitochondrial gene COI was sequenced. Multiple analyses using allele frequencies suggest at least two distinct populations for L. costata. total hypothesized post-glacial dispersal scenarios compared isolation by distance test various models. Evidence strongest Lakes: one utilizing connection between Wabash Maumee River watersheds, Wisconsin Green Bay watersheds. highly differentiated monophyletic costata identified in Ozark Highlands, which may constitute unique taxonomic entity.