Y染色体测序数据表明,哈普洛组N1a1的双重途径进入芬兰
Annina Preussner1, Jaakko Leinonen1, Juha Riikonen1
1Institute for Molecular Medicine Finland (FIMM), HiLIFE, University of Helsinki, Helsinki, Finland.
European journal of human genetics : EJHG
|October 28, 2024
概括
这项研究揭示了芬兰复杂的Y染色体遗传祖先,在N1a1单基组内确定了不同的亚系,这些亚系表明了多个到达路线. 这些发现突出了比以前理解的更复杂的芬兰人口历史.
科学领域:
- 人口遗传学 人口遗传学
- 人类祖先的人类祖先
- 对Y染色体进行分析
背景情况:
- Y染色体对于追踪父亲遗传祖先和人口历史至关重要.
- 之前的研究在芬兰发现了主要的Y染色体半组 (N1a1,I1a),表明了东方和西方祖先的贡献.
- 芬兰的微小Y染色体变异在很大程度上未被评估.
研究的目的:
- 在芬兰进行迄今为止最全面的Y染色体研究.
- 分析芬兰各地区Y染色体哈普洛组及其亚系的分布.
- 为了比较不同Y染色体单双组的自体遗传背景.
主要方法:
- 来自FINRISK项目的1802个地理地图绘制的芬兰Y染色体的测序.
- 在芬兰19个地区评估了常见Y染色体哈普洛组分布 (频率≥1%).
- 遗传学分析以解决主要哈普洛组 (N1a1,I1a,R1a,R1b) 内的关系.
主要成果:
- 识别了N1a1,I1a,R1a和R1b单元组内的新型亚系和解决的家族遗传关系.
- 发现了不同的地理丰富模式,特别是N1a1亚系N-Z1934 (东北) 和N-VL29 (西南).
- 发现N-VL29携带者与N-Z1934携带者相比,表现出更高比例的西南自体血统.
结论:
- 哈普洛组N1a1内的独特的人口结构模式表明至少有两个不同的抵达芬兰的途径.
- 这些发现表明芬兰人的遗传人口历史比以前认可的更复杂.
- 高分辨率的Y染色体数据提供了对区域遗传子结构和历史迁移的更深入的见解.
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