【摘要】 目的分析吉林地区汉族人群短串联重复序列(STR)3个双基因座即6个STR位点的遗传多态性分布,获得相应多态位点的群体遗传学数据。方法采集103份吉林地区汉族无血缘关系的个体血样,提取DNA,经聚合酶链反应(PCR)分3组进行复合扩增(Ⅰ:TPOX+CSF1PO,Ⅱ:D3S1358+D13S317,Ⅲ:D5S818+D19S400),非变性聚丙烯酰胺凝胶电泳(PAGE)分离后,银染显色分析。统计各等位基因的基因频率,分别计算各基因座的杂合度(H)、个人识别能力(DP)、非父排除率(PE)和多态性信息含量(PIC)。结果得到6个基因座各等位基因的基因频率,经χ2检验,基因型频率分布符合Hardy-Weinberg平衡,具有较高的杂合度和多态性信息含量。上述6个基因座的杂合度为0.7511~0.8376,个人识别能力为0.8273~0.9247,非父排除率为0.5167~0.6718,多态性信息含量为0.7100~0.8195。结论此STR3个双基因座具有高度多态性,是较理想的遗传标志,所得到的等位基因频率等数据可为法医学个人识别、亲子鉴定及群体遗传学研究提供依据。更多还原

【Abstract】 Objective To analyze the genetic polymorphism of three short tandem repeat (STR) double loci,namely,six STR loci in the Chinese population of Han nationality in Jilin district and to obtain the corresponding genetic data.Methods DNA was extracted from the blood cells of one hundred and three unrelated individuals of Han nationality in Jilin district;Six loci were divided into three groups which were groupⅠ(TPOX+CSF1PO),groupⅡ(D3S1358+D13S317) and groupⅢ(D5S818+D19S400).The extracted DNA were amplified with PCR multiplexing method.The PCR products were analyzed by non-reduced PAGE,followed by silver staining.The allele frequency distributions of six STR loci were studied by statistical procedures.The heterozygosity (H),discrimination power (DP),probability of exclusion (PE) and polymorphic information content (PIC) were calculated.Results The allele frequencies of six loci were obtained.The genotypes distributions of the loci were consistent with Hardy-Weinberg equilibrium and had higher heterozygosities and PIC.The H,DP,PE and PIC were 0.7511-0.8376,0.8273-0.9247,0.5167-0.6718 and 0.7100-0.8195 respectively.Conclusions The three STR double loci exhibited higher polymorphism and were better genetic markers.The data on the allele frequencies of these six STR loci may be used in individual identification,paternity testing and in other population genetic researches.更多还原