Abstract

Objective To evaluate the genetic polymorphisms and forensic efficiencies of 35 deletion/insertion polymorphism(DIP)loci and explore the genetic structure of the Han population in Shaanxi province.Methods Blood samples of 305 unrelated healthy individuals of the Han population in Shaanxi province were collected.And the allelic frequencies and forensic parameters of 35 DIP loci were calculated and analyzed based on their genotyping results by a self-developed amplification system.The genetic relationship of the Han population in Shaanxi province with the reference populations was explored by molecular variance analyses,phylogenetic tree reconstruction,multidimensional scale analyses,principal component analyses,and STRUCTURE analyses.Results The combined power of discrimination and probability of exclusion of the 35 DIP loci in the Han population in Shaanxi province were 0.999 999 999 999 991 119 and 0.9991,respectively.Population genetic analyses indicated that the Han population in Shaanxi province shared relatively closer genetic relationships with those in other regions of China.Conclusions The 35 DIP loci possessed high polymorphisms and could be used as an effective tool for forensic identification of individuals of the Han population in Shaanxi province.Furthermore,the 35 DIP loci could provide basic data for the genetic analysis of the Han population in Shaanxi province.

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