牛牛的孕期长度和生长表现:在第一次怀孕期间对遗传组进行比较分析
Julia Benner Inez Aniceto1, Samuel Rodrigues Bonamichi do Couto2, Thiago Freitas de Almeida Mattos1
1Programa de Pós-Graduação em Ciência Animal, Universidade Federal Rural do Rio de Janeiro, Seropédica, RJ, 23897-000, Brasil.
Tropical animal health and production
|July 18, 2025
概括
牛母牛的孕期长度和体重增加因基因组而异. 与Brangus和Nellore相比,Angus公牛的孕期较短,体重增加较少,这影响了繁殖策略.
科学领域:
- 动物科学动物科学
- 生殖生物学 生殖生物学
- 牛肉牛生产 牛肉牛生产
背景情况:
- 肉牛的孕期长度对于繁殖管理至关重要.
- 遗传背景显著影响生殖特征和后代的发展.
- 了解这些变化是优化牛肉生产效率的关键.
研究的目的:
- 为了在不同的肉牛遗传群体中比较孕期长度.
- 为了评估各种遗传背景的母牛从受孕到分娩的体重增加.
- 为了评估小母牛在第一次分娩时的体重.
主要方法:
- 这项研究涉及巴西一家商业农场的Angus,Brangus和Nellore公牛.
- 雌牛被管理在一个基于牧场的系统.
- 测量包括初始体重,受精,分娩和最终体重,并记录妊娠时间.
主要成果:
- 安格斯公牛的孕期最短 (282天),而内罗尔公牛的孕期最长 (295天).
- 格斯公牛从受孕到分娩时,体重增加最少.
- 因此,与Brangus和Nellore相比,Angus公牛在第一次分娩时的体重较低.
结论:
- 牛肉的繁殖参数受到遗传群的显著影响.
- 这些遗传变异需要针对基因选择和管理采取量身定制的方法.
- 这些发现支持定义最低繁殖重量和调整繁殖季的长度,以改善牛肉生产结果.
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