对于生育特征具有不同的遗传优点的无双雌牛的雌性活动
C B Reed1, B Kuhn-Sherlock1, C R Burke1
1DairyNZ Ltd., Hamilton, New Zealand, 3240.
Journal of dairy science
|July 27, 2024
概括
具有生育特征的积极遗传优势的乳牛表现出更大的雌性活动和更早的第一雌性. 这些雌性表达特征可以预测年轻牛的生育遗传价值.
科学领域:
- 动物科学动物科学
- 生殖生物学 生殖生物学
- 遗传学 是一个遗传学.
背景情况:
- 对于生育特征的遗传选择在乳牛管理中至关重要.
- 了解生育能力的基因功能的表型表达对于准确的育种计划至关重要.
研究的目的:
- 研究遗传优点对生育能力对乳牛雌性活动,持续时间和间隔的影响.
- 为了比较怀孕和非怀孕事件之间的雌激活动.
- 为了确定遗传优点是否影响第一个雌激素时的年龄和体重.
主要方法:
- 一项观察性研究使用了积极的 (POS FertBV) 和负的 (NEG FertBV) 生育遗传优势的霍尔施泰因-弗里斯山公牛的活动监测设备.
- 收集和分析了关于雌性事件,持续时间,强度 (总和峰值活动) 和雌性间隔的数据.
- 使用统计分析,包括危险比率,来比较群体并评估关系.
主要成果:
- 与负遗传优势 (NEG FertBV) 雌牛相比,具有正遗传优势 (POS FertBV) 的雌牛表现出明显更高的总和峰值雌性活动以及更长的雌性事件持续时间.
- 与怀孕相关的雌性事件比没有怀孕的事件更短,更不强烈.
- POS FertBV公牛更有可能在年龄较小和体重较低时经历他们的第一个雌性活动事件.
结论:
- 对生育特征的积极遗传优点与乳牛母牛更明显的雌性表达有关.
- 雌性活动和表达特征显示出潜在的生育能力遗传优势的早期指标.
- 这一发现支持将雌性行为监测集成到改善乳牛生育能力的遗传选择策略中.
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