Genetic polymorphism of 9 STR loci in Zhuang national minority of China

Genetic distribution for nine STR loci were determined in a Chinese Guangxi Zhuang national minority group based on STR gene scan marked by fluorescence. Sixty-two alleles and 169 genotypes were observed in 91 unrelated Zhuang individuals. The corresponding gene frequency and genotype frequency were 0.0054-0.5495 and 0.0110-0.3297 respectively. The expected and observed genotype frequency of nine STR loci was in accordance with the Hardy-Weinberg equilibrium (P > 0.05). The statistical analysis of nine STR loci showed PIC (polymorphic information content) > or = 0.6088, H (heterozygosity) > or = 0.6174, DP (discrimination power) > or = 0.8028, PPE (probability of paternity exclusion) > or = 0.8165. The genetic distance figured with 9 STR genetic data showed that there were significant differences between Chinese Zhuang national minority and the American White and the American Black, and there was little difference between Zhuang national minority and the Chinese Xi'an Han. The result of clusting showed that the present data were divided into three groups: the Black, the White and the Yellow (the Chinese).