GlobalFiler®PCR扩增试剂盒验证及其STR遗传多态性

摘要

Objective To test the technical param eters of GlobalFiler®PC R A m plification K it for its ap-plication to forensic application value and to investigate the genetic polym orphism s. Methods The valida-tion w as conducted in sensitivity, m ixed sam ples, species specificity, adaptability, survivability, consistency, peak height balance and stability. The am plification and detection of the genom ic D N A from 373 unre-lated individuals from B eijing H an nationality w ere extracted by autom ation w orkstation. Results Global-Filer®PC R A m plification K it w as adaptive to som e m ixed, degraded and inhibited sam ples. The pow er of sensitivity and adaptability and peak height balance show ed w ell. The distributions of genotype fre-quencies for 21 STR loci in the population w ere all in accordance w ith H ardy-W einberg equilibrium (P>0.05). The PIC value of the 21 STR loci w as am ong 0.536 to 0.940; the H value w as am ong 0.558 to 0.933; the D P value w as am ong 0.783 to 0.992; the PE value w as am ong 0.243 to 0.874. Conclusion GlobalFiler®PC R A m plification K it is suitable for crim inal cases and D N A database in forensic practice. A nd 21 STR loci in B eijing H an nationality have high polym orphism , w hich have ap-plication value in forensic practice and population genetics.%目的：测试GlobalFiler®PCR扩增试剂盒技术性能指标，评估其法医学应用价值，并对其遗传多态性进行调查。方法从灵敏度、混合样本、种属特异性、适应性、耐受性、一致性、均衡性、稳定性8个方面对该试剂盒进行测试，自动工作站提取北京地区汉族人群373名无关个体血样DNA进行扩增检测。结果GlobalFiler®PCR扩增试剂盒灵敏度较高，对混合、酶切降解和含抑制剂样品具有一定的检测分析能力，适应性和均衡性较好。21个STR基因座基因型频率分布均符合Hardy－Weinberg 平衡（P>0．05），PIC 值在0．536~0．940，H值在0．558~0．933，DP值在0．783~0．992，PE值在0．243~0．874。结论 GlobalFiler®PCR 扩增试剂盒可用于法庭科学实际检案与建库，21个STR基因座在北京汉族人群中具有较高的遗传多态性，对法医学应用和群体遗传学研究具有重要意义。