Genetic variation and population dispersal of Yangtze voles Microtus fortis calamorum in t

Genetic variation and population dispersal of Yangtze voles Microtus fortis calamorum in the

Dongting Lake region

Zongming GUO;Pengfei SONG;Cong GUO;Zhaobin SONG;Yong WANG;Bo LI;Meiwen ZHANG;Jianghong RAN

【期刊名称】《动物学报（英文版）》

【年(卷),期】2012(058)002

【摘要】To understand genetic variation and population dispersal in the Yangtze vole Microtusfortis calamorum distributed in the Dongting Lake region,144 individuals were collected from six habitat patches.The mitochondrial DNA control region was sequenced and 17 haplotypes were observed.Of the six investigated populations,haplotype and nucleotide diversities of those from larger patches were higher than those from smaller patches.Nonparametric correlation analysis showed that patch size had a positive correlation with haplotype diversity (r =0.943,P ＜ 0.01).A neighbour-joining tree of the 17 hapiotypes showed no geographic genetic structure among the six populations.Analysis of isolation by distance showed that genetic differentiation among the six populations was not positively related to geographic distance.Analysis of mismatch distribution indicated that the voles had passed through a population expansion.The pattern of haplotype distribution in the Changsha population suggests that the population was established by a