剖析多基因索引对跨基因祖先的行为表型的预测准确性
Robel Alemu1,2,3, Alexander S Young2,4, Daniel J Benjamin2,4,5
1Program in Medical and Population Genetics, Broad Institute of MIT and Harvard, 415 Main St, Cambridge, 10587, MA, USA.
Research square
|November 19, 2025
概括
在欧洲祖先上训练的多基因指数 (PGI) 在非欧洲人群中显示出预测能力降低. 诸如链接不平衡和等位基频率差异等因素有助于这种可移植性差距,因祖先和特征而异.
科学领域:
- 遗传学 遗传学 是一个
- 生物信息学是一种生物信息学.
- 人口遗传学 人口遗传学
背景情况:
- 多基因指数 (PGIs) 广泛用于遗传风险预测.
- 在欧洲祖先数据上接受培训的PGI表现出对非欧洲祖先的可移植性降低.
- 对于PGIs对于行为和社会特征的可移植性是不太了解的.
研究的目的:
- 系统地分析52个健康,行为和社会现象型的PGI跨不同祖先的可移植性.
- 在非欧洲人群中调查导致PGI准确性丧失的因素.
- 为了比较来自标准与基于家族的基因组广泛关联研究 (GWAS) 的PGIs.
主要方法:
- 利用了英国生物库和健康与退休研究数据集.
- 计算了全基因组的PGI.
- 评估了跨祖先遗传能力的差异.
- 使用标准和基于家庭的GWAS进行PGI性能比较.
主要成果:
- 在非欧洲祖先 (非洲人24%,东亚人37%,南亚人51%) 中证实有显著的PGI预测能力下降.
- 在生物学上,近位特征比行为/社会特征具有更大的可移植性.
- 链接不平衡和等位基因频率差异是非洲祖先PGI损失的主要驱动因素.
结论:
- PGI可移植性是一个重要的问题,特别是对于非欧洲祖先和复杂的特征.
- 导致PGI便携性丧失的因素因祖先而异.
- 基于家庭的GWAS PGIs为特定特征提供了适度的改进,这表明有可能减轻可移植性差距.
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