基于终身功绩的乳腺炎遗传评估的替代特征
Gabriel Leitner1, Shlomo E Blum1, Oleg Krifucks1
1National Mastitis Reference Center, Department of Bacteriology, Kimron Veterinary Institute, Bet Dagan 50250, Israel.
Genes
|January 23, 2024
概括
在早期哺乳期使用体细胞计数 (SCC) 值的新乳腺健康指标对于遗传选择来说比目前的哺乳期平均体细胞得分 (LSCS) 更有利. 这有助于提高终身牛奶产量和净值指数计算.
科学领域:
- 动物科学动物科学
- 乳牛遗传学 乳牛遗传学
- 乳腺炎研究 乳腺炎研究
背景情况:
- 对乳腺炎耐药性的遗传选择已经显示出有限的成功.
- 目前的乳腺炎诊断依赖于临床诊断或哺乳期平均体细胞评分 (LSCS),往往缺少亚临床病例.
研究的目的:
- 评估基于体细胞计数 (SCC) 值的新的乳腺健康指标,以改善遗传选择.
- 为了比较这种新指标与传统的LSCS的有效性.
主要方法:
- 分析了两个数据集:148只公牛根据感染状况分类,89601只以色列霍尔斯坦公牛根据SCC分类为乳腺健康 (UH) 或非健康 (UNH).
- 在健康群体和感染群体之间比较生产特征 (终身牛奶,生产日,哺乳期).
- 评估UH女儿的父群差异和与子健康状况相关的终身牛奶产量.
主要成果:
- 没有感染的小母牛和小母牛在一生中显著增加了奶量,生产日数和哺乳期.
- 生涯牛奶产量与子健康状况有很强的相关性 (r = +0.83).
- Sire 组在 UH 女儿的百分比上显示出显著的差异.
结论:
- 在第一个哺乳期内,乳腺健康值SCC<120,000细胞/毫升是乳腺健康的有价值指标.
- 与LSCS相比,这种二分法特征在计算终身净功绩指数 (NM$) 时是有利的.
- 这些发现支持使用早期哺乳期SCC值来更有效地对乳腺炎进行遗传选择.
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