尼罗尔牛的形态缺陷:对线性和值模型进行基因评估,对尼罗尔牛的形态缺陷进行基因评估
Milena Aparecida Ferreira Campos1,2, Hinayah Rojas De Oliveira2, Henrique Alberto Mulim2
1School of Veterinary Medicine and Animal Science, Federal University of Bahia, Salvador, Bahia, 40170-110, Brazil.
Journal of animal science
|December 24, 2025
概括
肉牛的遗传评估现在可以包括形态缺陷,改善动物福利和生产力. 研究表明,跨模型的基因参数估计一致,支持将它们纳入育种计划.
科学领域:
- 动物遗传学动物遗传学
- 量化遗传学 量化遗传学
- 畜牧业 生产 畜牧业 生产
背景情况:
- 肉牛的形态缺陷会影响动物福利和生产力.
- 这些缺陷目前在遗传评估中未得到充分研究.
- 了解遗传参数对于改善牛的健康和表现至关重要.
研究的目的:
- 评估内罗尔牛群中七种形态缺陷的流行情况.
- 使用线性和值模型估计这些缺陷的遗传参数.
- 评估跨不同模型的遗传评估的一致性.
主要方法:
- 分析了1998年至2021年期间记录的超过18万只内罗尔牛的数据.
- 利用线性和值模型来估计遗传性和遗传相关性.
- 从两种模型中得出的基因组估计育种值 (GEBVs) 的比较.
主要成果:
- 缺陷的遗传概率估计范围从0.03到0.12.
- 线性和值模型产生了类似的遗传性和一致的 sire 排名 (斯皮尔曼相关性 0.89-0.97).
- 鉴定了脚/腿,和大缺陷之间的中等遗传相关性;脱色素显示出弱相关性.
结论:
- 形态缺陷可以可靠地被纳入牛肉的常规遗传评估.
- 适合模型的转换确保了一致和可解释的遗传排名.
- 对这些缺陷的遗传分析可以提高动物福利和育种计划的效率.
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