法医学杂志 ›› 2023, Vol. 39 ›› Issue (3): 296-304.DOI: 10.12116/j.issn.1004-5619.2022.520602

所属专题: 法医学亲子和亲缘关系鉴定专题

• 论著 • 上一篇    下一篇

家系Y-STR基因座容差在系谱推断中的应用

童梦洁1(), 张科2, 李彩霞3, 张广峰3, 张文杰4, 杨澜5, 侯庆唐1(), 刘京3()   

  1. 1.合肥市公安局刑事警察支队,安徽 合肥 230000
    2.安徽省公安厅物证鉴定管理处,安徽 合肥 230061
    3.公安部鉴定中心 法医遗传学公安部重点实验室 现场物证溯源技术国家工程实验室,北京 100038
    4.陕西师范大学计算机科学学院,陕西 西安 710119
    5.山西医科大学法医学院,山西 晋中 030600
  • 收稿日期:2022-06-14 发布日期:2023-07-29 出版日期:2023-06-25
  • 通讯作者: 侯庆唐,刘京
  • 作者简介:侯庆唐,男,主任法医师,主要从事法医物证学鉴定;E-mail:marquihou@sina.com
    刘京,男,硕士,主检法医师,主要从事法医遗传学研究;E-mail:biojing@yeah.net
    童梦洁(1987—),女,副主任法医师,主要从事法医物证鉴定;E-mail:piao_yuyang@163.com
  • 基金资助:
    国家重点研发计划资助项目(2022YFC3341004);国家自然科学基金面上资助项目(82171870);公安部技术研究计划重点资助项目(2021JSZ15);中央级公益性科研院所基本科研业务费专项资金资助项目(2021JB004)

Application of Familial Y-STR Haplotype Mismatch Tolerance in Genealogy Inference

Meng-jie TONG1(), Ke ZHANG2, Cai-xia LI3, Guang-feng ZHANG3, Wen-jie ZHANG4, Lan YANG5, Qing-tang HOU1(), Jing LIU3()   

  1. 1.Criminal Police Detachment of Hefei Public Security Bureau,Hefei 230000,China
    2.Management Office of Physical Evidence,Department of Public Security of Anhui Province,Hefei 230061,China
    3.Key Laboratory of Forensic Genetics and National Engineering Laboratory for Forensic Science,Institute of Forensic Science,Ministry of Public Security,Beijing 100038,China
    4.School of Computer Science,Shaanxi Normal University,Xi’an 710119,China
    5.School of Forensic Medicine,Shanxi Medical University,Jinzhong 030600,Shanxi Province,China
  • Received:2022-06-14 Online:2023-07-29 Published:2023-06-25
  • Contact: Qing-tang HOU,Jing LIU

摘要:

目的 研究中国汉族家系中Y-STR基因座容差规律,为SNP系谱推断与家系排查联用工作提供家系选择依据。 方法 选取3个遗传关系清晰的汉族家系,利用YFiler Platinum PCR扩增试剂盒,得到所采男性样本35个Y-STR基因座分型数据,统计分析Y-STR单倍型在世代遗传中的变化及1~7级亲缘关系中的容差。 结果 各家系突变基因座及突变次数有差异,Y-STR突变具有家系特异性,66.03%的突变发生在快、高速突变基因座。1~7级亲缘对在35个Y-STR基因座上容差在0~5个,最远6步长;在中、慢速突变基因座上容差在0~2个,最远3步长;在快、高速突变基因座上容差在0~3个,最远6步长。 结论 联合应用SNP系谱推断技术与Y-STR家系排查,0容差及多容差均需考虑。可优先筛查在全部35个Y-STR基因座上0~3个容差且在中、慢速基因座上0~1个容差的家系。差异数符合条件时,步长较远的家系应谨慎排除。同时,应谨慎增加快速突变基因座。

关键词: 法医遗传学, 突变, Y染色体, 短串联重复序列, 亲缘关系, 家系, 男性

Abstract:

Objective To provide a guideline for genealogy inference and family lineage investigation through a study of the mismatch tolerance distribution of Y-STR loci in Chinese Han male lineage. Methods Three Han lineages with clear genetic relationships were selected. YFiler Platinum PCR amplification Kit was used to obtain the typing data of 35 Y-STR loci in male samples. The variation of Y-STR haplotypes in generation inheritance and the mismatch tolerance at 1-7 kinship levels were statistically analyzed. Results Mutations in Y-STR were family-specific with different mutation loci and numbers of mutation in different lineages. Among all the mutations, 66.03% were observed on rapidly and fast mutating loci. At 1-7 kinship levels, the number of mismatch tolerance ranged from 0 to 5 on all 35 Y-STR loci, with a maximum step size of 6. On medium and slow mutant loci, the number of mismatch tolerance ranged from 0 to 2, with a maximum step size of 3; on rapidly and fast mutant loci, the number of mismatch tolerance ranged from 0 to 3, with a maximum step size of 6. Conclusion Combined use of SNP genealogy inference and Y-STR lineage investigation, both 0 and multiple mismatch tolerance need to be considered. Family lineage with 0-3 mismatch tolerance on all 35 Y-STR loci and 0-1 mismatch tolerance on medium and slow loci can be prioritized for screening. When the number of mismatch tolerance is eligible, family lineages with long steps should be carefully excluded. Meanwhile, adding fast mutant loci should also be handled with caution.

Key words: forensic genetics, mutation, Y chromosome, short tandem repeats, kinship, family lineage, males

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