The population-genetic structure of the bivalve Corbicula japonica from ten estuarine localities in the Primorsky Region was investigated using nine allozyme loci as gene markers. This study revealed spatial genetic heterogeneity between the investigated populations (G st = 0.05); its degree was dependent on the distance between populations. No linkage disequilibrium was found for any pair of loci. The index of genetic similarity between pairs of populations varied from 0.916 to 0.994. The genetic heterogeneity of the C. japonica populations is probably a result of genetic drift balanced by an irregular gene flow. Such an equilibrium may indicate a relatively recent expansion of C. japonica, which may have occurred during the Holocene climatic optimum (about 7500 years ago).
Russian Journal of Marine Biology – Springer Journals
Published: Jul 3, 2014
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