东北地区棕背鼠平种群遗传结构及亚种分类

The population genetic structure and subspecies of Myodes rufocanus in Northeast China

棕背孵（Myodes rufocanus）隶属于啮齿目、仓鼠科、孵属，是全北区大陆森林的优势物种，在我国主要分布于黑龙江、吉林、辽宁、内蒙古、河北、山西、新疆等北部地区（杨春文和金建丽，2003）。Ellerman和Morrison-Scott（1951）认为棕背爵全球共10余个亚种，

Using partial sequences of mtDNA control region, we sought genetic diversity, population genetic structure and subspecies classification in 5 populations of Myodes rufoeanus from Northeast China and Hokkaido, Japan. After sequencing a 616 bp segment of control region, we detected 45 haplotypes based on 57 variable sites among 55 individuals. Our results revealed that high-level haplotype diversity and slightly less nucleotide diversity occurred in these populations. AMOVA a- nalysis showed that high-level genetic differentiation happened between populations due to 64. 70% genetic diversity and Fst ranging from 0. 240 to 0. 814. In a phylogenetic analysis, the haplotypes from Northeast China split into two groups： Dax- ing＇ anling-Xiaoxing＇ anling-Wandashan and Hailin-Dahailin. This suggested that we can separate the populations from Northeast China into two subspecies, M. r. irkutensis and M. r. Changbaishanensis respectively corresponding with the for- mer and latter areas.