在怀孕期期间食反受保护的胆会对哺乳牛肉小牛的产后表型产生影响
Masroor Sagheer1, McKenzie L J Haimon1,2, Samuel Hincapie Montoya1,3
1Department of Animal Sciences, D.H. Barron Reproductive and Perinatal Biology Research Program, and Genetics Institute, University of Florida, Gainesville, FL, USA.
Journal of animal science and biotechnology
|April 1, 2025
概括
在孕期期间给肉牛食反保护胆 (RPC) 并没有增加小牛的断奶体重. 相反,来自RPC养的小牛体重减少,与胚胎培养研究形成鲜明对比.
科学领域:
- 动物科学动物科学
- 生殖生物学 生殖生物学
- 营养生理学 营养生理学
背景情况:
- 在实验室中补充胆化物可以增强植入前牛胚胎的发育,从而增加小牛的断奶体重.
- 经保护的胆 (RPC) 被研究了其在孕期期间给肉牛时诱导类似的编程效应的潜力.
研究的目的:
- 为了确定在孕期期间给肉牛食原蛋白保护胆 (RPC),是否会改变小牛的表型.
- 评估RPC补充对小牛生长和身体组成的影响.
主要方法:
- 一项初步研究检查了在养不同RPC水平的奶牛中胆代谢物度.
- 第二个实验涉及将60g/d的RPC给肉牛从第1天到第7天,相对于定时人工授精.
- 在出生后监测小牛的生长,体型测量和生殖参数.
主要成果:
- 在初步研究中,没有观察到血胆或代谢物度的差异.
- 补充RPC并没有影响怀孕率,分娩率或小牛出生体重.
- 来自RPC养的小牛在118天和248天的年龄更轻,体重/身高比较低.
结论:
- 孕期RPC补充计划牛的发育,改变产后小牛的表型.
- 观察到的小牛体重减少与体外胆补充剂所观察到的效果相反.
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