用8个SSR（simple sequence repeats）分子标记分别对我国长江中下游流域的13个克氏原螯虾野生群体的等位基因数（Na）、期望杂合度（He）、观测杂合度（Ho）、多态性信息含量（PIC）、HardyW〖KG-*7〗einberg平衡指数与遗传距离等进行研究。结果显示：各群体不同标记位点的等位基因数为3~5个，平均期望杂合度、平均观测杂合度与多态性信息含量分别分布在0.37~0.57、0.23~0.48与0.40~0.56，表明在这些群体中存在较丰富的遗传多样性。群体遗传距离聚类分析得出：13个克氏原螯虾群体初步分化为3个类群，分别为以太湖（TH）与鄱阳湖（PYH）为代表的类群，以重庆与巢湖为代表的类群和以洪湖、洞庭湖与洪泽湖等为代表的类群。以上结果表明我国具有遗传多样的克氏原螯虾种质资源。
Genetic analysis of 13 red swamp crayfish (Procambarus clarkii) populations from different regions of the Yangtze River basin in China were performed using 8 simple sequence repeats (SSR) makers. The allele number,herterozygosity,polymorphism information content (PIC),Hardy einberg equilibrium index and genetic distance in the 13 populations were identified,respectively. The results showed that there were 3-5 alleles at each SSR marker locus in the population,the expected heterozygosity were 0.37-0.57,the observed heterozygosity were 0.23-0.48,and the PIC were 0.40-0.56,respectively,suggesting a higher genetic diversity among the investigated populations. In addition,3 groups were classified by a neighborjoining method based on the genetic distance among the populations. Taihu (TH) and Poyanghu (PYH) populations represented the first group,Chongqing (CQ) and Chaohu (CH) populations represented the second group and Honghu (HH),and Dongtinghu (DTH) and Hongzehu (HZH) populations represented the third group. These results indicate that China has a red swamp crayfish resource of high genetic diversity.