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Analysis of Genetic Diversity and Differentiation of Seven Stocks of Litopenaeus vannamei Using Microsatellite Markers

文献类型： 外文期刊

作者： Zhang Kai 1 ; Wang Weiji 2 ; Li Weiya 2 ; Zhang Quanqi 1 ; Kong Jie 2 ;

作者机构： 1.Ocean Univ China, Coll Marine Life Sci, Key Lab Marine Genet & Breeding, Minist Educ, Qingdao 266003, Peoples R China

2.Chinese Acad Fishery Sci, Yellow Sea Fisheries Res Inst, Key Lab Sustainable Utilizat Marine Fisheries Res, Minist Agr, Qingdao 266071, Peoples R China

3.Shandong Marine Fishing & Prod Management Stn, Yantai 264000, Peoples R China

关键词： Litopenaeus vannamei;microsatellite;introduced stock;genetic diversity;genetic differentiation

期刊名称：JOURNAL OF OCEAN UNIVERSITY OF CHINA （ 影响因子：0.913； 五年影响因子：1.012 ）

ISSN： 1672-5182

年卷期： 2014 年 13 卷 4 期

页码：

收录情况： SCI

摘要： Seven microsatellite markers were used to evaluate the genetic diversity and differentiation of seven stocks of Litopenaeus vannamei, which were introduced from Central and South America to China. All seven microsatellite loci were polymorphic, with polymorphism information content (PIC) values ranging from 0.593 to 0.952. Totally 92 alleles were identified, and the number of alleles (Na) and effective alleles (Ne) varied between 4 and 21 and 2.7 and 14.6, respectively. Observed heterozygosity (H-o) values were lower than the expected heterozygosity (H-e) values (0.526-0.754), which indicated that the seven stocks possessed a rich genetic diversity. Thirty-seven tests were detected for reasonable significant deviation from Hardy-Weinberg equilibrium. F-is values were positive at five loci, suggesting that there was a relatively high degree of inbreeding within stocks. Pairwise F-st values ranged from 0.0225 to 0.151, and most of the stock pairs were moderately differentiated. Genetic distance and cluster analysis using UPGMA revealed a close genetic relationship of L. vannamei between Pop2 and Pop3. AMOVA indicated that the genetic variation among stocks (11.3%) was much lower than that within stocks (88.7%). Although the seven stocks had a certain degree of genetic differentiation and a rich genetic diversity, there is an increasing risk of decreased performance due to inbreeding in subsequent generations.

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