Mitochondrial DNA variation in the East China Sea and Yellow Sea populations of swimming crab Ovalipes punctatus
文献类型: 外文期刊
第一作者: Zheng, Wei
作者: Zheng, Wei;Han, Zhiqiang;Yu, Cungen;Han, Zhiqiang;Chen, Guobao;Gao, Tianxiang
作者机构:
关键词: Dispersal capacity;genetic structure;mtDNA;Ovalipes punctatus
期刊名称:MITOCHONDRIAL DNA ( 影响因子:0.925; 五年影响因子:0.994 )
ISSN: 1940-1736
年卷期: 2015 年 26 卷 4 期
页码:
收录情况: SCI
摘要: Swimming crab Ovalipes punctatus is a commercially important species in the East China Sea and Yellow Sea, but there is limited knowledge of its genetic population structure. The population genetic structure of O. punctatus in East China Sea and Yellow Sea was examined with a 658-bp segment of the mtDNA COI gene. A total of 60 individuals were collected from five locations and 48 haplotypes were obtained. Mean haplotype diversity and nucleotide diversity for the five populations were 0.9876 +/- 0.0068 and 0.0074 +/- 0.0041, respectively. Analysis of molecular variance (AMOVA) detected no significant differences at all hierarchical levels, and all F-ST values were non-significant, indicating that no significant population genetic structure exists in the East China Sea and Yellow Sea. These results supported the null hypothesis that O. punctatus within the East China Sea and Yellow Sea constitutes a panmictic mtDNA gene pool. Neutrality tests and mismatch distribution supported population expansion in this species, indicating that climate change could play an important role in affecting the demographic history of marine species. Strong dispersal capacity of larvae and adults, and ocean currents in the studied area could be the reasons for genetic homogeneity in this species in the East China Sea and Yellow Sea. Another explanation for the lack of phylogeographic structure in O. punctatus might reflect a recent range expansion after the last glacial maximum and insufficient time to attain migration-drift equilibrium.
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