转时间的遗传参数,每日平均牛奶温度,以及Holstein牛的自动奶制系统产生的奶制特征
Ali Altınsoy1,2, Hacer Yavuz Altınsoy2, Serdar Duru2
1Lely International N.V., Cornelis van der Lelylaan 1, 3147 PB Maassluis, The Netherlands.
Animals : an open access journal from MDPI
|February 13, 2026
概括
自动挤奶系统 (AMS) 为乳牛遗传评估提供了宝贵的数据. 像奶时间和反时间这样的特征显示出适度的遗传性,这表明有可能进行繁殖改进.
科学领域:
- 动物遗传学动物遗传学
- 乳制品科学 乳制品科学
- 精准畜牧业 精准畜牧业 精准畜牧业 精准畜牧业
背景情况:
- 自动挤奶系统 (AMS) 提供乳牛的持续数据收集.
- 这些数据包括生产,奶制能力,行为和生理信息.
- AMS数据为乳牛的遗传评估提供了新的机会.
研究的目的:
- 使用AMS数据估计各种特征的变异组件和遗传参数.
- 评估牛奶效率,反时间和牛奶温度的遗传性和可重复性.
- 探索这些特征之间的遗传相关性,以潜在的育种应用.
主要方法:
- 分析了商业牛群中1252头荷尔斯坦牛的65,475份每周记录.
- 使用可重复性动物模型通过限制的最大概率来装配.
- 包括特征:牛奶产量,挤奶效率,反时间 (RT) 和每日平均牛奶温度 (MTEMP).
主要成果:
- 适度至高的遗传概率估计为挤奶时间 (0.31),挤奶速度 (0.38),RT (0.30) 和MTEMP (0.28).
- 对行为特征的较低但有意义的遗传性,如奶次数 (0.26) 和拒绝次数 (0.11).
- 奶时间和速度的高重复性 (0.77,0.79);MTEMP显示季节性变化.
结论:
- 来自AMS的表型为乳牛功能特征的遗传研究提供了有价值的数据.
- 对于日常平均牛奶温度等特征存在遗传变异,尽管解释需要小心.
- 局限性包括单一群的数据和有限的血统,需要多群和基因组研究以获得更广泛的适用性.
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