胚胎移植后的受孕率与乳牛人工授精后的受孕率的描述
Shuhei Fukaya1, Takeshi Yamazaki2, Hayato Abe3
1Laboratory of Animal Genetics and Reproduction, Research Faculty of Agriculture, Hokkaido University, Sapporo 060-8589, Japan.
Journal of dairy science
|July 5, 2024
概括
乳牛的人工授精 (AI) 和胚胎移植 (ET) 显示出不同的受孕率. ET避免了高牛奶产量和分娩时间的负面影响,表明分娩后60天内的生育能力.
科学领域:
- 生殖生物学 生殖生物学
- 乳牛养殖管理 乳牛养殖管理
- 动物科学动物科学
背景情况:
- 人工授精 (AI) 和胚胎移植 (ET) 是奶牛的关键生殖技术.
- 怀孕率对于选择有效的育种策略至关重要.
- 与人工智能相比,对影响ET受孕率的环境因素的数据有限.
研究的目的:
- 调查影响乳牛胚胎移植 (ET) 怀孕率的环境因素.
- 为了比较环境因素对外星人受孕率的影响与人工授精 (AI) 的受孕率.
主要方法:
- 分析了来自日本北海道的霍尔斯坦牛的1,870,143首个AI记录和29,922首个ET记录.
- 使用多变量后勤回归模型来评估受孕率.
- 奶牛按乳量在哺乳期的峰值 (PY) 和从小犊到第一次授精/转移 (CFI/CFT) 的间隔分组.
主要成果:
- 人工智能受孕率随着原生母牛和多生母牛的产量增加而下降.
- 随着牛奶产量增加,ET受孕率没有显著下降.
- 即使在分娩后60天内进行,ET受孕率仍然很高,与AI不同.
结论:
- 胚胎移植 (ET) 减轻了高奶产和近期生育对受孕率的负面影响.
- 奶牛在分娩后60天内通过ET表现出生育能力.
- 在高产奶牛群中,ET提供了一种可行的替代方案,以保持繁殖效率.
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