尼罗尔牛的行为和生长特征的遗传参数
Anielly P Freitas1,2, Maria Lúcia P Lima1, Flávia F Simili1
1Beef Cattle Research Center, Animal Science Institute/APTA/SAA, Sertãozinho, São Paulo 14174-000, Brazil.
Journal of animal science
|August 25, 2023
概括
选择具有更好的气质和生长的内罗尔牛是可能的. 这项研究确定了气质得分 (TS) 和飞行速度 (FS) 与生长特征之间的遗传联系,并提出了改善动物福利和生产力的特定选择策略.
科学领域:
- 动物科学动物科学
- 遗传学 是一个遗传学.
- 动物福利 动物福利
背景情况:
- 消费者对动物福利的关注需要改进生产系统.
- 动物的气质对于健康的发育和减少牲畜事故至关重要.
- 选择温顺的气质可以提高整体动物福利和农场安全.
研究的目的:
- 估计内罗尔牛的气质和生长特征的遗传参数.
- 使用集群和主要成分分析 (PCA) 分析遗传模式.
- 识别具有不那么容易兴奋的气和优越的增长潜力的个体.
主要方法:
- 从1,245只内罗尔牛 (2008-2016) 中利用了2,332个测量结果.
- 使用贝叶斯推理与两种特征动物模型估计的遗传参数.
- 应用集群分析和PCA来探索遗传模式.
主要成果:
- 遗传概率估计:TS (0.08),FS (0.12),BCS (0.06),LW (0.13),HH (0.48) 的时间.
- 在TS和FS之间存在强烈的正基因相关性 (0.78 ± 0.24).
- 在TS/FS和生长特征 (LW,BCS,HH) 之间有利/无遗传相关性.
- 集群3确定了低TS/FS和高BCS/LW/HH的动物.
结论:
- 繁殖计划可以利用集群3和PC1来选择Nellore牛.
- 减少兴奋和增强生长的选择是基因可行的.
- 改善动物气质有助于提高肉牛的福利和生产力.
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