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肉牛定时人工授精计划中生育率的决定因素:来自近200万个数据点的预测能力和风险因素

R E F Assis¹, F Baldi², L B Temp²

¹Universidade de São Paulo- Faculdade de Zootecnia e Engenheira dos Alimentos, Departamento de Medicina Veterinária, Pirassununga 13635-900, Brasil.

Animal : an international journal of animal bioscience

|January 25, 2025

概括

肉牛的定时人工授精 (TAI) 受女性因素的影响,如身体状况和遗传学,以及农场管理. 优化这些元素是提高每次授精妊娠率的关键.

科学领域:

生殖生物学和动物科学.

背景情况:

定时人工授精 (TAI) 对于牛生产至关重要,因为它依赖于受控的卵巢卵泡生长.
了解影响TAI成功的因素对于优化肉牛养殖计划至关重要.

研究的目的:

分析大量的TAI事件数据集,以确定影响怀孕率的内在和外在女性因素.
为了确定风险因素和预测能力,在商业肉牛怀孕成功.

主要方法:

分析了来自南美2,002个农场的1,832,999个TAI事件.
统计建模包括15个固定效应/相互作用和5个随机效应.

主要成果:

怀孕/AI (P/AI) 受到服役顺序,身体状况得分 (BCS),遗传组 (Bos taurus/杂交>Bos indicus),繁殖季节,雌性类别和时期/地区的显著影响.
诸如BCS和遗传组,BCS和女性类别等因素之间的相互作用也影响了P/AI.
农场,技术人员和 sire 显示了 P/AI 的最高预测能力.

结论:

肉牛生育能力的关键内在因素包括服务顺序,BCS,女性类别和遗传组.
繁殖季节和气候等外部因素显著影响P/AI.
农场管理,人工智能技术人员,精液质量和女性BCS对于成功的TAI计划至关重要.

关键词:

牛类牛类牛类牛类牛类牛概念概念概念概念牛-小牛的牛犊.怀孕的结果怀孕的结果生殖生殖的繁殖

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