多种组学分析揭示了选择的特征和与猪复杂特征相关的位置
Lei Liu1,2,3, Guoqiang Yi1,2,4, Yilong Yao1,2
1Shenzhen Branch, Guangdong Laboratory of Lingnan Modern Agriculture, Key Laboratory of Livestock and Poultry Multi-omics of MARA, Agricultural Genomics Institute at Shenzhen Chinese Academy of Agricultural Sciences Shenzhen China.
iMeta
|November 20, 2025
概括
这项研究使用广泛的基因组数据揭示了影响猪特征的关键遗传因素,如脂肪沉积和免疫力. 研究结果揭示了人工选择如何影响猪的发育,并为遗传改进提供了资源.
科学领域:
- 基因组学就是基因组学.
- 动物遗传学动物遗传学
- 分子生物学分子生物学
背景情况:
- 猪中复杂特征和表型多样性的遗传基础尚未完全理解.
- 化和选择性育种对猪的遗传和表型产生了重大影响.
研究的目的:
- 构建一个全面的猪泛基因组,并识别新的遗传变异.
- 调查东方和西方猪品种之间的表型差异化遗传基础.
- 阐明在猪发育过程中驱动表型变化的调节机制.
主要方法:
- 产生了七个新的高质量的de novo组装猪基因组,结合现有数据共计九个基因组.
- 分析了1081个重新排序的基因组来构建一个猪泛基因组,识别了非布伦纳序列,新型基因,结构变异 (SV) 和单核酸多态 (SNP).
- 整合了来自骨肌肉的27个发育阶段的转录组和甲基组数据,以研究基因调节.
主要成果:
- 确定了134.24 Mb的非冗余的非参考序列,1099个新的蛋白质编码基因,187,927个SV和30,143,962个SNP.
- 发现与脂肪细胞生长和脂肪沉积相关的BRCA1和与免疫反应和肺损伤相关的ABCA3.
- 发现人工选择改变了DNA甲基化,影响了像GHSR和BDH1这样的发育基因的表达,特别是在胚胎发生过程中.
结论:
- 这项研究为猪提供了广泛的基因组资源,包括新的基因和变异.
- 确定了与重要的经济特征和疾病耐药性相关的特定基因 (BRCA1,ABCA3).
- 阐明了猪体现型差异化和发育的表观遗传调节机制,为遗传改进提供了洞察力.
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