Microsatellite analysis of genetic diversity and population structure of Chinese mitten crab (Eriocheir sinensis)
文献类型: 外文期刊
第一作者: Chang, Yumei
作者: Chang, Yumei;Liang, Liqun;Ma, Haitao;Sun, Xiamen;Chang, Yumei;He, Jianguo;Ma, Haitao
作者机构:
关键词: Chinese mitten crab;genetic diversity;population structure;admixture
期刊名称:JOURNAL OF GENETICS AND GENOMICS ( 影响因子:4.275; 五年影响因子:5.223 )
ISSN: 1673-8527
年卷期: 2008 年 35 卷 3 期
页码:
收录情况: SCI
摘要: Chinese mitten crab (Eriocheir sinensis) has higher commercial value as food source than any other species of Eriocheir in China. To evaluate the germplasm resources and characterize the genetic diversity and population structure of the crabs in different water systems, two stocks and two farming populations were assessed with 25 polymorphic microsallite loci available in public GenBank. Basic statistics showed that the average observed heterozygosity (Ho) amongst populations ranged from 0.5789 to 0.6824. However, a remarkable presence of inbreeding and heterozygote deficiencies were observed. To analyze population structure, pairwise F-ST coefficients explained only similar to 10.3% variability from the subdivision of mitten crab populations, the remaining variability stems from the subdivision within subpopulations. Although the four populations had slight differentiation, different allelic frequencies resulted in distinct population structures. Two stocks and one farming population were clustered together to the phylogenetic branch of Yangtze crab, with an approximate membership of 95%. Whereas, another farming population was clustered singly to the phylogenetic branch of the Liaohe crab, with a membership of 97.1%. The tests for individual admixture showed that Yangtze crab had probably been contaminated with individuals from other water systems. Genetic relationships between populations also supported the conclusion that Yangtze crab and Liaohe crab had different gene pools in spite of the origins of the same species.
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