在2 548个父子对中的41个Y染色体STR中基于序列的突变模式
Ze Liu1, Guannan Long1, Yubo Lang2
1DNA Laboratory of Forensic Science Center, Shenyang Public Security Bureau, Shenyang, China.
Forensic sciences research
|August 25, 2023
概括
这项研究分析了2548个北汉汉族父子对中的41个Y-STR,揭示了突变率并确定了新型变异. 开发了一个新的工具,StatsY,用于对Y-STR数据进行法医分析.
科学领域:
- 法医遗传学 法医遗传学
- 人口遗传学 人口遗传学
- 人类遗传学 人类遗传学
背景情况:
- Y染色体短串重复 (Y-STRs) 对于追踪男性血统和法医识别至关重要.
- 了解特定人群中的Y-STR突变率和变异对于准确的法医应用至关重要.
- 之前的研究已经确定了Y-STR突变模式,但需要持续使用特定人群的数据和先进的类型化方法.
研究的目的:
- 在北汉族中国父子对的大量队列中,对41个Y-STR进行基因造型.
- 为了确定这个群体中的Y-STR哈普洛型多样性,歧视能力和突变率.
- 为了比较大规模并行测序 (MPS) 和毛细管电泳 (CE) 的结果,并识别新的遗传变异.
主要方法:
- 使用41个Y-STR位点对2548对父子对进行基因定型.
- 对象识别的MPS和CE类型方法的比较,包括基于长度和变异的等位基因.
- 桑格测序和MPS用于突变确认和单核酸多态 (SNP) 和缺失的识别.
- 开发用于自动计算法医参数的 StatsY 软件.
主要成果:
- 观察到高分类型多样性 (0.999956608) 和歧视能力 (0.96741007).
- 总共有2387个独特的单元型被检测到.
- 268对父子对在单个位点表现出突变,平均Y-STR突变率约为3.4 x 10^-3.
- 确定了16个新的重复区域 (RR) 变异基因,两个SNP和一个4-bp删除.
- 该 StatsY 软件是为高效的法医数据分析而开发的.
结论:
- 该研究为北汉族中国人群提供了宝贵的Y-STR数据,增强了法医识别能力.
- 诸如较长的STR区域,复杂的动机和父系遗传等因素影响Y-STR突变率.
- StatsY的开发为Y-STR数据的自动化法医分析提供了重大进步.
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