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Hereditas(Beijing) ›› 2022, Vol. 44 ›› Issue (4): 335-345.doi: 10.16288/j.yczz.22-006

• Research Article • Previous Articles     Next Articles

Genetic polymorphisms of 66 InDel loci in the Chinese Han population

Xueqian Wang1,2(), Qingzhen Zhang2, Peng Cheng2, Tingting Dong2, Weiguo Li1(), Zhe Zhou2(), Shengqi Wang2()   

  1. 1. College of Life Sciences, Henan Normal University, Xinxiang 453007, China
    2. Beijing institute of Radiation Medicine, Academy of Military Medical Sciences, Beijing 100850, China
  • Received:2022-01-06 Revised:2022-03-15 Online:2022-04-20 Published:2022-03-24
  • Contact: Li Weiguo,Zhou Zhe,Wang Shengqi E-mail:Wangxqer0122@163.com;liwg0618@htu.edu.cn;zhouzhe@bmi.ac.cn;sqwang@bmi.ac.cn

Abstract:

Insertion/deletion polymorphism (InDel) genetic markers refer to insertion or deletion of DNA fragments into genomic DNA, which have advantages in the identification of degraded samples. In this study, we independently screened 66 highly polymorphic InDel markers from the dbSNP database to establish a multiplex PCR system for forensic DNA identification using next-generation sequencing system (66-plex InDels). We assessed the population genetic data among 251 Chinese Han population using this system and evaluated their potential forensic application. The results showed that all 66 InDel loci conformed to the Hardy-Weinberg equilibrium (P>0.000 758), and all the pairwise InDel loci were in linkage equilibrium after Bonferroni correction. The mean observed heterozygosity (Ho) was 0.482, the mean expected heterozygosity (He) was 0.483,the mean discrimination power (DP) was 0.612, the mean polymorphism information content (PIC) was 0.365, the total discrimination power (TDP) reached 0.999 999 999 999 999 999 999 999 999 428 18. The cumulative power of exclusion for 66 InDel loci was 0.999 739 in duo cases (CPEduo) and was 0.999 999 999 417 in trios cases (CPEtrio). The results show that the 66 InDel loci have high genetic polymorphisms in the Chinese Han population and can be used independently for forensic DNA identification and paternity testing.

Key words: insertion/delationpolymorphism (InDel), Chinese Han population, DNA identification, paternity testing