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目的调查广西壮族人群18个短串联重复序列(Short Tandem Repeat,STR)位点的遗传多态性,并研究其法医学应用价值。方法采用DNA Typer~(TM) 19荧光标记复合扩增试剂盒,对广西壮族223名无关个体血样进行复合扩增,使用3130XL遗传分析仪进行检测,Genemapper ID v3.2软件进行分析。结果共检出196个等位基因,基因频率分布在0.002~0.516之间,杂合度在0.614~0.888之间,个体识别能力在0.788~0.978之间,多态信息含量在0.56~0.88之间,非父排除概率在0.308~0.771之间。结论 18个STR位点在广西壮族人群中具有良好的遗传多态性,可用于群体遗传学及法医学研究。
Objective To investigate the genetic polymorphisms of 18 short tandem repeat (STR) loci in Guangxi Zhuang nationality and to study the value of forensic medicine. Methods A total of 223 unrelated individual blood samples were amplified by DNA Typer ™ (TM) 19 fluorescent labeling multiplex amplification kit. The 3130XL genetic analyzer was used to analyze the data. Genemapper ID v3.2 software was used to analyze the data. Results A total of 196 alleles were detected. The frequency of the genes was between 0.002 and 0.516, the heterozygosity was between 0.614 and 0.888, the individual’s recognition ability was between 0.788 and 0.978, the polymorphism information content was between 0.56 and 0.88, The probability of non-parent exclusion between 0.308 ~ 0.771. Conclusion 18 STR loci have good genetic polymorphism in Guangxi Zhuang population and can be used in population genetics and forensic science.