法医学杂志 ›› 2025, Vol. 41 ›› Issue (3): 228-236.DOI: 10.12116/j.issn.1004-5619.2022.521002

• 论著 • 上一篇    下一篇

基于CODIS核心13个常染色体STR基因座分析不同群体中的遗传结构

何曦1(), 汤真1, 夏明英1, 赵一琦1, 罗雨然1, 李士林1,2()   

  1. 1.复旦大学生命科学学院,上海 200438
    2.复旦大学法庭科学研究院,上海 200032
  • 收稿日期:2022-10-06 发布日期:2025-08-29 出版日期:2025-06-25
  • 通讯作者: 李士林
  • 作者简介:何曦(1998—),女,硕士,主要从事法医遗传学研究;E-mail:xihe19@fudan.edu.cn
  • 基金资助:
    公安部物证鉴定中心开放课题资助项目(2015FGKFKT01);教育部科学技术研究资助项目(113022A)

Analysis of Genetic Structure among Different Populations Based on 13 Auto-somal STR Loci in CODIS Core

Xi HE1(), Zhen TANG1, Ming-ying XIA1, Yi-qi ZHAO1, Yu-ran LUO1, Shi-lin LI1,2()   

  1. 1.School of Life Sciences, Fudan University, Shanghai 200438, China
    2.Institute of Forensic Science, Fudan University, Shanghai 200032, China
  • Received:2022-10-06 Online:2025-08-29 Published:2025-06-25
  • Contact: Shi-lin LI

摘要:

目的 基于CODIS核心13个常染色体STR基因座研究不同群体的遗传差异性。 方法 从PubMed数据库中选取1999—2021年在科技期刊上公开发表的来自95个群体的13个常染色体STR基因座(CSF1PO、FGA、THO1、TPOX、vWA、D3S1358、D5S818、D7S820、D8S1179、D13S317、D16S539、D18S51、D21S11)数据,整理基因座等位基因频率,计算法医学参数Gst值、Ht值、Hs值和Nei氏DA遗传距离,并通过主成分分析、系统发育树和多维尺度分析探讨群体遗传结构。 结果 95个群体的13个STR基因座共检测出265个等位基因,平均Gst值、Ht值和Hs值分别为0.023 247、0.797 915和0.779 365。群体遗传结构分析显示,亚、非、欧三大洲间群体差异显著;亚裔人群中大陆和岛屿群体有一定的区分度;亚裔人群中汉族与周边群体之间有一定的区分度,而汉族群体内部,北方汉族和南方汉族形成显著的两个群体。 结论 CODIS核心13个常染色体STR基因座对于不同人群的群体识别有潜在应用价值,有望应用于不同洲际人群间的族群区分。

关键词: 法医遗传学, 群体遗传学, 遗传标记, 常染色体STR, DNA联合索引系统

Abstract:

Objective To investigate the genetic differences among different populations based on 13 autosomal STR loci in CODIS core. Methods Data of 13 autosomal STR loci (CSF1PO, FGA, THO1, TPOX, vWA, D3S1358, D5S818, D7S820, D8S1179, D13S317, D16S539, D18S51, D21S11) were collected from 95 populations in scientific journals between 1999 and 2021, soursed from the PubMed database, which had been published. Allele frequencies of loci were sorted out and forensic genetic parameters including gene differentiation coefficient (Gst), total heterozygosity (Ht), subpopulation heterozygosity (Hs) values, and Nei’s DA genetic distance were calculated. Principal component analysis, phylogenetic tree, and multidimensional scale analysis were conducted to assess population genetic structure. Results A total of 265 alleles were detected at the 13 STR loci in these 95 populations. The mean values of Gst, Ht, and Hs were 0.023 247, 0.797 915 and 0.779 365. Population genetic analyses reflected significant differences among populations from Asia, Africa and Europe. In Asian populations, there was a certain degree of distinction between mainland and island populations; the Han population showed a certain degree of distinction with surrounding populations in mainland; while within the Han population, there were two distinct clusters formed by the northern Han and the southern Han. Conclusion The 13 autosomal STR loci in CODIS core demonstrate potential value for population identification across different groups, and may be used for the differentiation of ethnic groups, among different continental populations.

Key words: forensic genetics, population genetics, genetic marker, autosomal STR, combined DNA index system (CODIS)

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