Polymorphism analysis and evaluation of nine non-CODIS STR loci in the Han population of Southern China
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Published on: July 17, 2021
Da Yue Tong1, Xin Yao Wu, Hong Yu Sun
1Department of Forensic Biology, Sun Yat-Sen University, Zhongshan 2 Road #74, Guangzhou, China.
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.
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