关键词: 生物地理学, DNA 系统分类学, Cyt b 基因, 大麝鼩, 韩国, 俄罗斯远东地区

Abstract: To reexamine genetic divergence of Korean Crocidura lasiura from an adjacent far-eastern Russian population, we obtained Cyt b complete nine sequences (1 140 bp)of C. lasiura from four locations in Korea and three locations in fareastern Russia,and these sequences were compared to the corresponding complete four and partial (402 bp)four sequences of C. lasiura,obtained from GenBank. We found from this Cyt b complete sequence analysis that Korean C. lasiura is not monogenic,and concluded that Cyt b partial sequences of C. lasiura have to be used with caution for population structure investigation. More importantly,we detected from this analysis with Cyt b complete sequences that Korean C. lasiura is distinct from other C. lasiura in far-eastern Russia,with average JC distance of 1. 08% and seven fixed site differences,and consider that genetically divergent Korean C. lasiura has not been in contact from other C. lasiura in adjacent far-eastern Russia even during the last glacial maxima. Finally,we found that present sequencing results do not support the current
subspecies classification,recognizing C. lasiura as a monotypic species,but do support a previous classification,recognized Korean C. lasiura as C. l. thomasi,although further sequencing analyses with more C. lasiura specimens from northeastern China are needed to confirm the present findings

Key words: Biogeography, Crocidura lasiura, Cyt b gene, DNA ststematics, Far-eastern Russia, Korea