成都汉族群体八个STR基因座遗传多态性研究

目的 了解中国人８个ＳＴＲ基因座等位自然结构特征，获得汉族群体的遗传数据。方法 ＥＤＴＡ抗凝血样采自成都地区无新缘关系汉族个体。Ｃｈｅｌｅｘ法提取ＤＮＡ，ＰＣＲ护增，非变性聚丙烯酰胺凝胶不连续缓冲系统水平电泳分型，自动激光荧光测序仪测定ＤＮＡ序列。结果 序列分析显示，成都汉族人８个ＳＴＲ基因座中，５个ＳＴＲ基因座具有简单重复序列，３个ＳＴＲ基因座具有复杂重复序列。８个ＳＴＲ基因座在成都汉族群体中均

Genetic polymorphisms of eight STR loci in a Chinese Han population

Objective To understand the allele structure and genetic polymorphism at eight STR loci in Chinese Han population and construct a preliminary database. Methods EDTA blood specimens were collected from the unrelated individuals in Chengdu, China. The DNA samples were extracted with Chelex method and were amplified by PCR technique. The PCR products were analyzed by the PAG horizontal electrophoresis with discontinuous buffer system and by the approach of the automated fluorescence detection. Results Five STR loci consist of simple repeat motifs, while three STR loci contain complex repeat structures. The STR polymorphisms at all of the eight loci have been observed in Chinese Han population. According to the obtained data, the combined exclusion probability and the combined discrimination power for these STR markers in Chinese population are 0.9978 and 0.999 999 992, respectively. Conclusion The obtained data are beneficial to understanding the population genetics of the eight STR loci in Chinese Han population. For forensic genetics, the obtained data can be used to calculate the probabilities dealing with the paternity test and the individual identification.