乳制品生产者与牛肉生产者选择牛肉人工受精器的差异
D P Berry1, S C Ring2, A J Twomey1
1Teagasc, Animal & Grassland Research and Innovation Centre, Moorepark, Fermoy P61 P302, Co. Cork, Ireland.
JDS communications
|March 14, 2024
概括
乳制品生产商选择不同的牛肉人工授精 (AI) 产妇,而不是牛肉生产商,影响后代的特征. 这种差异在很大程度上是由于品种选择,影响分娩容易和尸体特征.
科学领域:
- 动物育种与遗传学
- 生殖技术 生殖技术
- 畜牧生产系统 畜牧生产系统
背景情况:
- 乳牛群中对牛肉的需求日益增加,这表明可能需要单独的繁殖计划.
- 了解乳制品和牛肉行业之间牛精选的遗传差异至关重要.
研究的目的:
- 为了确定牛肉人工授精 (AI) 产品的平均遗传价值的差异,牛肉人工授精 (AI) 产品由乳制品生产商使用,而不是牛肉牛犊生产商.
- 分析遗传特征,包括孕期长度,分娩困难,产前死亡率,尸体重量,形状和脂肪分数.
主要方法:
- 利用一个大型的国家人工授精 (AI) 数据库,记录牛奶和牛肉群的记录.
- 分析了1,230,622个人工智能服务中的1,802个牛肉AI主人的遗传优点估计.
- 使用斯皮尔曼等级相关性比较 sire 使用模式和遗传优点.
主要成果:
- 乳制品生产商选择的牛肉AI的平均遗传价值与牛肉生产商选择的牛肉AI的平均遗传价值存在显著差异.
- 的选择差异因是母牛还是母牛而有所不同.
- 品种选择占了两种生产系统之间遗传优点差异的很大一部分.
结论:
- 乳制品生产商通常选择较短的孕期和较低的分娩困难倾向的牛肉AI.
- 乳制品生产商选择的母牛的后代预计与牛肉生产商选择的母牛相比,他们的尸体更轻,更不合规.
- 雄牛选择的差异反映了乳制品和牛肉行业之间不同的品种偏好和遗传目标.
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