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基因表达和RNA拼接解释了牛中复杂特征的遗传能力的很大比例
Ruidong Xiang1,2,3, Lingzhao Fang4,5, Shuli Liu6
1Faculty of Veterinary & Agricultural Science, the University of Melbourne, Parkville, VIC 3052, Australia.
Cell genomics
|October 23, 2023
概括
调节性DNA变异通过影响基因表达和RNA拼接,显著影响牛的特征. 这些变异,特别是那些在转基因中起作用的变异,解释了特征遗传性的很大一部分,突出了它们在哺乳动物遗传学中的关键作用.
科学领域:
- 基因组学就是基因组学.
- 量化遗传学 量化遗传学
- 分子生物学分子生物学
背景情况:
- 许多定量特征位点 (QTLs) 位于非编码DNA区域,这表明它们在基因调节中的作用.
- 影响基因表达 (eVariants) 或RNA拼接 (sVariants) 的DNA变异对于理解表型变异至关重要.
研究的目的:
- 量化e变体和s变体对多种牛特征遗传性的贡献.
- 评估 cis 和 trans 作用调节变体对复杂特征的影响.
主要方法:
- 从大约12万头牛的16个组织中分析e变体和s变体.
- 应用贝叶斯混合模型来估计变体对遗传性的贡献.
- 通过37个不同的特征和56个脂质组特征进行评估.
主要成果:
- 总的来说,cis和transe变体和s变体解释了37个特征的69.2%的遗传性,超过了44%的预期.
- 变异作用的e-/s变异单独对遗传性平均贡献了24%,比预期高出14%.
- 对于56个脂质组特征,多组织的cis和trans-e/s变体解释了71.5%的遗传性.
结论:
- 调控变异,包括那些在转变作用的变异,是哺乳动物表型变异的重要驱动因素.
- 这些发现强调了非编码变异在基因调节和特征确定中的重要性.
- 多组织分析揭示了调节变异对复杂特征的广泛影响,如脂管学.
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