宁夏地区回族人群五个短串联重复序列位点的分析

目的分析宁夏地区回族人群5个短串联重复序列(short tandem repeat，STR)位点的遗传多态性。方法选择位于11号、14号、17号和19号染色体上的5个STR多态位点D11S1984、D14S306、D14S617、D17S1290和D19S433，采用PCR扩增，变性聚丙烯酰胺凝胶电泳结合银染方法对宁夏地区144名无血缘关系的回族人群进行遗传多态性分析。结果5个STR位点在宁夏回族人群中分别检出等位基因10、8、11、13和8个，基因型30、25、33、40和23种；杂合度分别为：0．8413、0．8033、0．8331、0．8369和0．7703；多态信息量为：0．8217、0．7746、0．8121、0．8174和0．7332；个体识别率：0．9516、0．9257、0．9611、0．9660和0．9135，累积个体识别率为：0．9999995；非父排除率：0．7046、0．6367、0．6911、0．7012和0．5801，累积非父排除率为：0．9958。基因型分布符合Hardy—Welnberg平衡。结论这5个STR位点在宁夏地区回族人群中具有较高的多态性，是较好的遗传标记，可应用于群体遗传学的研究及法医学的个体识别和亲子鉴定中。

Genetic polymorphism of 5 short tandem repeat loci in Hui population in Ningxia area

Objective To analyze the genetic polymorphism of 5 short tandem repeat(STR) loci in Hui population in Ningxia area. Methods The genetic polymorphisms of five selected STR loci(D11S1984, D14S306, D14S617, D17S1290 and D19S433) in chromosomes 11, 14, 17 and 19 in 144 unrelated individuals in Hui population in Ningxia area were analyzed by PCR amplification, denaturing polyacrylamide gel electrophoresis(PAGE) and silver staining. Results 10,8,11,13 and 8 alleles, 30,25,33,40 and 23 genotypes of the 5 STR loci in Hui population in Ningxia were detected. The measured values of the heterozygosity of the 5 STR loci were 0.8413, 0.8033, 0.8331, 0.8369 and 0.7703; of the polymorphism information content were 0.8217, 0.7746, 0.8121, 0.8174 and 0.7332; of the discrimination power (DP) were 0.9516, 0.9257, 0.9611, 0.9660 and 0.9135. The calculated discrimination power was 0.9999995. The measured values of paternity exclusion were 0.7046, 0.6367, 0.6911, 0.7012 and 0.5801; the calculated paternity exclusion was 0.9958. The genotype distributions were in accordance with Hardy-Weinberg equilibrium. Conclusion The 5 STR loci have better polymorphism in Hui population in the Ningxia area, and thus could serve as useful markers for population genetics research and for individual identification and paternity test in forensic medicine.