Population genetic structure of the parasitic nematode Camallanus cotti inferred from DNA sequences of ITS1 rDNA and the mitochondrial COI gene

文献类型： 外文期刊

第一作者： Wu, Shan G.

作者： Wu, Shan G.;Wang, Gui T.;Xi, Bing W.;Xiong, Fan;Liu, Tao;Nie, Pin;Wu, Shan G.;Wang, Gui T.;Xi, Bing W.;Xiong, Fan;Liu, Tao;Nie, Pin;Wu, Shan G.;Xi, Bing W.;Xi, Bing W.;Xiong, Fan;Liu, Tao

作者机构：

关键词： Population genetic structure;ITS1 rDNA;COI gene;Fish;Camallanus cotti

期刊名称：VETERINARY PARASITOLOGY （ 影响因子：2.738； 五年影响因子：2.951 ）

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收录情况： SCI

摘要： The population genetic structure of fish parasitic nematode, Camallanus cotti, collected from the Yangtze River, Pearl River and Minjiang River in China was investigated. From these parasites, the ~730bp of the first internal transcribed spacer of ribosomal DNA (ITS1 rDNA) and the 428bp of mitochondrial cytochrome c oxidase subunit I (COI) gene were sequenced. For the ITS1 rDNA data set, highly significant Fst values and low rates of migration were detected between the Pearl River group and both the Yangtze River (Fst=0.70, P <0.00001; Nm=0.21) and Minjiang River (Fst=0.73, P <0.00001; Nm=0.18) groups, while low Fst value (Fst=0.018, P >0.05) and high rate of migration (Nm=28.42) were found between the Minjiang and the Yangtze rivers. When different host/locality populations (subpopulations) within each river were considered, subpopulations between the Yangtze River and Minjiang River had low Fst values (<=0.12) and high Nm values (>3.72), while Pearl River subpopulations were significantly different from the Yangtze River and Minjiang River subpopulations (Fst>=0.59; Nm<1). The COI gene data set revealed a similar genetic structure. Both phylogenetic analyses and a statistical parsimony network grouped the Pearl River haplotypes into one phylogroup, while the Yangtze River and Minjiang River haplotypes formed a second group. These results suggested that the Yangtze River and Minjiang River subpopulations constituted a single reproductive pool that was distinct from the Pearl River subpopulations. In addition, the present study did not find host-related genetic differentiation occurring in the same drainage.

分类号： S85

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