乳牛的弹性:使用每日牛奶重量的数据驱动检测和定量干扰
Fiona L Guinan1, Robert H Fourdraine2, Francisco Peñagaricano1
1Department of Animal and Dairy Sciences, University of Wisconsin-Madison, Madison, WI 53706.
Journal of dairy science
|August 2, 2025
概括
奶牛具有弹性,使他们能够在压力事件中保持牛奶产量. 这项研究使用每日牛奶产量数据量化牛的弹性,揭示了它.
科学领域:
- 动物科学动物科学
- 乳牛遗传学 乳牛遗传学
- 环境压力因素 环境压力因素
背景情况:
- 越来越多的极端天气和劳动力短缺需要有弹性的牲畜.
- 奶牛群是根据牛的平等性,哺乳期和产量对牛进行分组的.
- 每日牛奶产量和位置数据可以模拟压力因素并检测干扰.
研究的目的:
- 开发一种数据驱动的方法来检测笔级扰动.
- 为了测量个体奶牛对这些干扰的抵抗力 (三角洲奶产).
- 估计弹性的遗传性及其与牛奶一致性的遗传相关性.
主要方法:
- 从227,633头奶牛 (2018-2024) 每天使用了6260万个牛奶重量.
- 根据牛奶产量残留物,拟合了个别的哺乳曲线,并确定了基于牛奶产量残留物的干扰.
- 估计的差异组件,遗传能力和 sire 预测的传递能力 (PTA) 相关性.
主要成果:
- 三角洲牛奶产量的遗传性 (h2) 从0.01到0.20不等.
- 耐力和牛奶一致性 (TempVar) 之间的Sire PTA相关性在 -0.51 到 -0.16.
- 更一致的奶牛在干扰期间表现出较低的奶产损失.
结论:
- 个别的奶牛表现出不同程度的适应场级别干扰的弹性.
- 弹性,通过三角洲牛奶产量来衡量,是一种遗传性特征.
- 选择适应性可以提高奶牛的适应性和可持续性.
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