Genetic polymorphisms of the pentanucleotide repeat loci Penta D and Penta E in Wuhan Han population by re-designed primers / 中国法医学杂志

ABSTRACT

Objective To study the primer design for Penta D and Penta E genotyping and investigate the genetic polymorphisms of these two loci in Chinese Han population in Wuhan.Methods 281 unrelated Chinese individuals living in Wuhan were typed by hot-start PCR with re-designed Penta D and Penta E genotyping primers and PAGE technique,and the results were compared with those by the PowerPlex TM 16 system of Promega.Results The amplified fragment size of Penta D and Penta E loci with re-designed primers ranged between 153～198bp and 107～212bp respectively,which were consistent with the results obtained by the re-designed primers and PowerPlex TM 16 system,and the re-designed primers had a higher sensitivity than PowerPlex TM 16 system (0.2ng vs 0.5ng) by silver staining.10 and 21 alleles were observed for Penta D and Penta E in Chinese Han population in Wuhan,and the genotype distributions of the two loci were in accordance with Hardy-Weinberg equilibrium.Family studies confirmed Mendelian inheritance of alleles.The power of discrimination (DP) for Penta D and Penta E were 0.926 2 and 0.986 0,and the power of exclusion (PE) were 0.665 1 and 0.832 5 respectively.Conclusion The re-designed primers for Penta D and Penta E genotyping are reliable.These two loci are highly polymorphic in Chinese Han population and can be used in forensic identification and paternity test.