Genetic diversity and population structure of Eleutheronema rhadinum in the East and South China Seas revealed in mitochondrial COI sequences

文献类型： 外文期刊

第一作者： Sun Xinxu

作者： Sun Xinxu;Xu Dongdong;Lou Bao;Xin Jian;Guo Yaoshi;Ma Shilei;Sun Xinxu;Guo Yaoshi;Ma Shilei;Zhang Tao

作者机构：

关键词： Eleutheronema rhadinum;cytochrome c oxidase subunit I (COI);genetic diversity;population structure

期刊名称：CHINESE JOURNAL OF OCEANOLOGY AND LIMNOLOGY （ 影响因子：1.068； 五年影响因子：0.983 ）

ISSN： 0254-4059

年卷期： 2013 年 31 卷 6 期

页码：

收录情况： SCI

摘要： Eleutheronema rhadinum is a potential commercial fisheries species and is subject to intense exploitation in China. Knowledge on the population structure of E. rhadinum in Chinese coastal waters, which is important for sustainable exploitation and proper resource management, is lacking. In the present study, the genetic diversity and population structure of E. rhadinum were evaluated using a 564-base pair fragment of the mitochondrial cytochrome c oxidase subunit I (COI) gene. A total of 76 specimens were collected from three localities around the East (Qidong and Zhoushan) and South China Seas (Zhuhai). Among these individuals, nine polymorphic sites were detected and 11 distinct haplotypes were defined. High levels of haplotype diversity (h = 0.759 +/- 0.035) and low levels of nucleotide diversity (pi=0.001 98 +/- 0.003 26) were observed in these populations. Hierarchical analysis of molecular variance (AMOVA) indicated that 96.72% of the genetic variation occurred within the populations, whereas 3.28% occurred among populations. No significant genealogical branches or clusters were recognized on the neighbor-joining tree. Intra-group variation among populations was significant (phi(st)=0.032 85, P<0.01). These results suggest that E. rhadinum populations in the East and South China Seas have developed divergent genetic structures. Tests of neutral evolution and mismatch distribution suggest that E. rhadinum may have experienced a population expansion. The present study provides basic information for the conservation and sustainable exploitation of this species.

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