Polymorphism analysis and evaluation of nine non-CODIS STR loci in the Han population of Southern China.

ABSTRACT

BACKGROUND: Knowledge of allele and genotype frequencies is an essential prerequisite to the use of any human polymorphism in forensic work. AIM: To study the genetic polymorphism and evaluate the application value of nine STR loci. SUBJECTS AND METHODS: Genotyping of nine STR loci, including D11S2368, D12S391, D13S325, D18S1364, D22-GATA198B05, D6S1043, D2S1772, D7S3048 and D8S1132, of 1050 unrelated individuals was performed with the STR_Typer_10_v1 kit and Genetic Analyzer 3100 and analyzed with PowerState V12.xls and Arlequin ver 3.11 analyzing software. RESULTS: Allele frequency distribution was statistically analyzed and Hardy-Weinberg equilibrium determined. Several common parameters used in forensic sciences were found the heterozygosity (H) ranged from 0.827 to 0.892; the matching probability (MP) ranged from 0.029 to 0.074; the power of discrimination (PD) ranged from 0.926 to 0.971; the power of exclusion (PE) ranged from 0.649 to 0.779; the polymorphic information content (PIC) ranged from 0.77 to 0.86; and the typical paternity index (TPI) ranged from 2.88 to 4.62. CONCLUSION: The results indicate that nine STR loci are high polymorphic among the Han population in Southern China. This set of polymorphic STR loci is a useful tool in forensic paternity testing and anthropological study.