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纳洛尔牛的综合基因组表征

Gabriel Campos¹, Henrique Mulim², Henrique Ventura³

¹Department of Animal Sciences, Purdue University, West Lafayette, IN, 47907, US. gabrielsoarescampos@hotmail.com.

|February 25, 2026

概括

巴西Nellore牛的基因组分析显示了强烈的链接不平衡,支持基因组选择. 有效种群规模 (Ne) 足以维持遗传多样性,并确定了与重要生产特征相关的区域.

科学领域:

动物遗传学动物遗传学
人口基因组学人口基因组学
畜牧养殖畜牧养殖畜牧养殖

背景情况:

牛 (Bos taurus indicus) 在热带农业中至关重要,特别是在巴西.
了解它们的遗传构成是改善基因组预测,关联研究和遗传多样性的关键.
巴西Nellore牛的基因组表征是使用链接不平衡,有效种群大小 (Ne) 和同卵性 (ROH) 的运行进行的.

研究的目的:

通过基因组信息来描述巴西的内罗尔牛.
评估种群的遗传多样性和选择的有效性.
识别与经济重要特征相关的基因组区域.

主要方法:

跨染色体的链接不平衡 (LD) 的分析.
对最近几代人的有效人口规模 (Ne) 的估计.
识别同胞性 (ROH) 和ROH岛屿的运行.
应用生成代理选择方法 (GPSM) 来检测选择签名.

主要成果:

平均LD为0.28,最近一代的Ne为225.
确定了一个ROH岛,与尸体质量和生育率有关.
GPSM确定了77个重要的SNP和142个与抗性,生长,尸体特征,孕产妇能力和繁殖相关的QTL.

结论:

估计的LD支持在内罗尔牛群中成功实施基因组选择.
尼表示足够的遗传多样性,为品种的长期健康.
GPSM的结果证实了有效的遗传选择和在内罗尔人群中观察到的基因组变化.

关键词:

实际人口规模实际人口规模.一代代理代码代码代码.链接不平衡链接不平衡运行 homozygosity 的运行.塞布·泽布 (Zebu Zebu) 是一个名字.

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