全球Angus种群的基因组结构和选择历史:ROH的见解,选择映射和功能分析
Henrique A Mulim1, Gabriel S Campos2,3, Fernando F Cardoso4
1Department of Animal Science, Purdue University, West Lafayette, IN, 47907, USA. hmulim@purdue.edu.
概括
对五种安格斯牛群的基因组分析揭示了不同的遗传特征和选择历史. 这些发现支持整合全球Angus种群,以改善基因组评估和可持续牛肉生产.
科学领域:
- 动物遗传学动物遗传学
- 基因组学就是基因组学.
- 牛肉牛的繁殖 牛肉牛的繁殖
背景情况:
- 来自苏格兰的安格斯牛是一种具有全球意义的牛肉品种,拥有超过400年的选择性育种经验.
- 选择的关键特征包括适应性,受访性,生长,体型和料效率.
- 了解遗传多样性和选择史对于优化育种策略至关重要.
研究的目的:
- 为了调查遗传多样性,选择历史,并在五个安格斯牛种群 (美国,加拿大,澳大利亚,巴西,美国红色安格斯) 中确定关键的基因组区域.
- 评估选择对人体体重,大理石和柔软等特征的影响.
- 评估整合全球人口的潜力,以加强基因组评估.
主要方法:
- 分析了71,283头安格斯牛的基因组数据,使用主要组件分析 (PCA),基因树和同型性运行 (ROH).
- 应用生成代理选择映射 (GPSM) 方法来确定选择历史.
- 已识别的基因组区域的功能注释,以精确定位候选基因和通路.
主要成果:
- 在美国,加拿大,澳大利亚和巴西Angus种群之间观察到最小的遗传差异,红色Angus显示出更大的分歧.
- 巴西人群表现出ROH的数量最多,这表明内生繁殖率较高.
- 在BTA8和BTA13上的ROH岛屿与美国和澳大利亚人群的体重,大理石和柔情有关.
- GPSM在所有人群中确定了体重和生长的显著标记,反映了持续的选择.
结论:
- 基因组分析为安格斯牛的遗传结构和选择历史提供了宝贵的见解.
- 在主要的Angus种群中存在显著的遗传相似性,支持整合.
- 通过整合全球人口,可以增强基因组评估,从而改善遗传预测和可持续牛肉生产.
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