Differentiation of geographical populations of the Siberian newt Salamandrella keyserlingii throughout the species range was analyzed using a fragment of the cytochrome b gene. The population of the Primorye region (Russian Far East) is separated to the greatest extent; the Japanese and South Kuril populations are the next most separate. These populations are possibly subspecies. Geographical differentiation of populations in the Siberian part of the species range is lower, lacks a clinal variation, and is irregular. The molecular variation of S. keyserlingii supports the hypothesis that several primary vicarious refugia of pre-Pleistocene differentiation of a common ancestor of Salamandrella occurred in the southeastern part of its current distribution range and that northern and western regions were gradually colonized via repeated steps of expansion and retreat in the Siberian part of the modern species range.
Russian Journal of Genetics – Springer Journals
Published: Aug 22, 2008
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