Journal of Forensic Medicine ›› 2022, Vol. 38 ›› Issue (6): 739-746.DOI: 10.12116/j.issn.1004-5619.2021.511102

• Techniques and Applications • Previous Articles     Next Articles

Analysis of Genetic Polymorphism and Population Genetic Structure of 57 Autosomal InDel Loci in Beichuan Qiang Population

Chun-yue JIANG1(), Hao MA1, Qing-wei FAN1, Hui-ling YANG1, Dong-dong XU1, Yun WANG1, Bing DU1,2()   

  1. 1.School of Basic Medicine and Forensic Medicine, North Sichuan Medical College, Nanchong 637000, Sichuan Province, China
    2.Forensic Science Service Center of North Sichuan Medical College, Nanchong 637000, Sichuan Province, China
  • Received:2021-11-01 Online:2022-12-25 Published:2022-12-28
  • Contact: Bing DU

Abstract:

Objective To investigate the genetic information of 57 autosomal InDel loci (A-InDels) included in AGCU InDel 60 fluorescence detection kit in the Beichuan Qiang population of Sichuan Province and evaluate its application value in forensic medicine. Methods A total of 200 unrelated healthy individuals from Beichuan Qiang population of Sichuan Province were typing detected by AGCU InDel 60 fluorescence detection kit. Allele frequencies and population genetic parameters of the 57 A-InDels were statistically analyzed and compared with the available data of 26 populations. Results After Bonferroni correction, there was no linkage disequilibrium between the 57 A-InDels, and all loci were in Hardy-Weinberg equilibrium. Except for rs66595817 and rs72085595, the minor allele frequencies of 55 A-InDels were above 0.3. PIC ranged from 0.298 3 to 0.375 0, CDP was 1-2.974 8×10-24, CPEduo was 0.999 062 660, and CPEtrio was 0.999 999 999. The calculation of the genetic distance showed that Beichuan Qiang population had the closest genetic distances with Beijing Han and South China Han populations, but far away from African populations. Conclusion The 57 A-InDels in AGCU InDel 60 fluorescence detection kit have a good genetic polymorphism in Beichuan Qiang population of Sichuan Province, which can be used as effective supplemental for individual identification and paternity identification in forensic medicine.

Key words: forensic genetics, genetic polymorphism, insertion/deletion (InDel), autosome, genetic distance, Qiang ethnic group, Beichuan

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