影响乳母牛与牛肉母牛受精的产卵难度和妊娠时间的因素
R H Ahmed1, C Schmidtmann2, J Mugambe1
1Institute of Animal Breeding and Husbandry, Christian-Albrechts-University Kiel, Hermann-Rodewald-Straße 6, 24118 Kiel, Germany.
Animal : an international journal of animal bioscience
|November 28, 2024
概括
牛肉乳制品 (BoD) 育种策略可以增加小牛的价值. 瓦格尤十字表现出最低的分娩难度,而利莫辛十字表现出最高的分娩难度. 谨慎的 sire 选择是成功的 BoD 计划的关键.
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 遗传学 是一个
背景情况:
- 牛肉与乳制品 (BoD) 交叉繁殖旨在通过将乳制品母牛与牛肉母牛交配来提高小牛的经济价值.
- 广泛采用需要评估 sire 品种影响利能力的特征,特别是分娩困难和孕期长度.
研究的目的:
- 在与荷尔斯坦乳交叉时,在不同牛肉母品种 (安格斯,比利时蓝,利莫辛,瓦吉尤) 中比较分娩困难和怀孕时间.
- 在BoD系统中识别影响分娩容易度和妊娠持续时间的 sire 品种特征.
主要方法:
- 分析了来自122个农场的3,966只 BoD小牛,使用二进制逻辑和线性回归模型.
- 对不同品种的分娩难度进行比较,包括对格斯和比利时蓝羊的千平方分析.
- 评估诸如小牛的性别,平度,出生体重和妊娠时间等因素.
主要成果:
- 瓦格尤杂交动物表现出最低的分娩困难,而利莫辛杂交动物显示出最高的发病率.
- 安格斯杂交的怀孕时间最短 (280.2天),利莫辛杂交的怀孕时间最长 (287.6天).
- 雄性小牛和母牛有明显更高的分娩困难风险.
结论:
- 在牛肉奶制品计划中,Sire品种的选择显著影响了生育难度和孕期长度.
- 优化BoD策略需要仔细考虑 sire 品种和个体 sires 对于像出生体重和怀孕时间长度等特征,以尽量减少分娩问题.
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