乳腺炎对奶牛的牛奶产量和乳糖含量有累积和持久的影响
A Costa1, H Bovenhuis2, C Egger-Danner3
1Department of Veterinary Medical Sciences, University of Bologna, 40064 Ozzano dell'Emilia (BO), Italy.
Journal of dairy science
|September 29, 2024
概括
乳牛的重复性乳腺炎会永久减少乳糖和产量,因为它会损害乳腺. 为了抵抗累积性乳腺炎的繁殖可以改善奶牛的健康和牛奶质量.
科学领域:
- 动物科学动物科学
- 乳制品科学 乳制品科学
- 遗传学 是一个遗传学.
背景情况:
- 牛奶中的乳糖含量 (LC) 随着平价和乳腺炎症而降低,影响牛奶质量.
- 诸如衰老,挤奶压力和乳腺炎等因素会损害乳腺上皮质的完整性,并减少LC.
- 乳腺炎会影响乳汁的合成能力,因此需要评估其对乳产量 (MY) 和LC的持久影响.
研究的目的:
- 评估乳腺炎症对牛奶产量和乳糖含量的累积和持久影响.
- 调查累积性乳腺炎是否是一种遗传性特征.
- 为了确定累积性乳腺炎,LC和MY之间的遗传相关性.
主要方法:
- 使用了来自奥地利Fleckvieh奶牛的临床乳腺炎诊断和牛奶数据.
- 采用单变体和双变体线性动物模型进行遗传性和遗传相关性估计.
- 使用终身体细胞计数 (SCC) 峰值计算累积炎症事件.
主要成果:
- 患有乳腺炎的奶牛显示,LC和MY的显著减少.
- 累积性乳腺炎表现出比单个乳腺炎事件 (h2≤0.03) 更高的遗传性 (h2=0.09).
- 累积性乳腺炎,LC和MY之间的负遗传相关性表明对乳腺炎的遗传抵抗性.
结论:
- 重复的乳腺炎会永久地损害乳腺上皮质的完整性和合成能力.
- 累积性乳腺炎是一种遗传性特征,对LC和MY有显著的负面影响,包括亚临床病例.
- 累积性乳腺炎是一种有前途的表型,用于选指数,以培育乳腺炎耐药性和弹性.
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