目的:调查17个Y染色体短串联重复序列(Y-STR)基因座及其单倍型在广西毛南族人群中的分布情况。方法:应用AmpF1STR Yfiler^TM荧光标记复合扩增系统,对毛南族208名无关男性个体血样进行17个Y-STR位点的复合扩增,用ABI PRISM310遗传分析仪对扩增产物进行检测分析。结果:DYS456、DYS389I、DYS390、DYS389Ⅱ、DYS458、DYS19、DYS385a\b、DYS393、DYS391、DYS139、DYS635、DYS392、y-GATA-H4、DYS437、DYS438、DYS448各位点遗传多样性(GD值)分布在0.5852-0.9770之间。17个Y-STR位点共同构成的单倍型205种,其单倍型多样性为0.999785。广西毛南族与其他群体的Y-STR位点等位基因分布差异具有统计学意义。结论:广西毛南族17个Y-STR位点具有丰富的遗传多样性,可为父权鉴定和父系进化研究提供有价值的遗传学资料。
Objective: To investigate the Allelic and haplotype frequency distribution of seventeen short tandem repeat loci of Y chromosome in Maonan nationality in Guangxi province. Methods: Seventeen Y-STR loci, of which the template DNAs were extracted from blood samples of 184 unrelated male individuals in Maonan population, were amplified by using the AmpF1STR Yfile^rTM. The PCR products were genotyped with ABI PRISM 310 genetic analyzer. Results: The gene diversity ranged from 0. 585 2 to 0. 977 0 at DYS456, DYS389 Ⅰ , DYS390, DYS389 Ⅱ, DYS458, DYS19, DYS385a/ b, DYS393, DYS391, DYS439, DYS635, DYS392, Y-GATA-H4, DYS437, DYSI38 and DYS448. A total of 205 different haplotypes were observed. The haplotype diversity value calculated from all 17 loci combined was 0. 999 785. The significant difference of the allelic frequency distribution in Y-STR loci was observed between Maonan population and other observed populations. Conclusion: The 17 Y-STR loci in Maonan population of Guangxi province are highly affluent genetic polymorphic and can offer valuable genetic data for paternity testing and paternal genetic lineages evolution.