在热带条件下解码公牛生育能力:从25512个现场精子图的多变量预测建模
Clovis Juk Fassano1, Pedro Henrique Lomba de Lima1, Fernando Andrade Souza2
1Programa de Pós Graduação Em Ciência Animal, Pontifícia Universidade Católica Do Paraná, Curitiba, Paraná, Brazil.
Reproduction in domestic animals = Zuchthygiene
|March 5, 2026
概括
这项研究确定了内罗尔公牛的繁殖健康的关键指标,包括精液质量和阴囊周长. 一个新的风险指数 (BSRI) 有助于对公牛进行分层,以便在热带环境中更好地进行 sire 选择.
科学领域:
- 兽医科学 兽医科学 兽医科学
- 动物繁殖 动物繁殖
- 量化遗传学 量化遗传学
背景情况:
- 评估公牛的繁殖健康对于有效的畜牧管理至关重要.
- 热带条件带来了独特的挑战,影响了公牛的生育能力和生殖健康.
- 需要采用数据驱动的方法来客观地评估大型公牛群的繁殖健康.
研究的目的:
- 确定在热带条件下确定内罗尔公牛繁殖健康的关键因素.
- 开发一个可靠的风险分层框架,用于品种健全性评估.
- 创建一个实用的工具,用于 sire 选择和管理决策.
主要方法:
- 通过使用宏观和微观精液特征,临床数据和流行病学因素评估了25512只内罗尔公牛.
- 采用多变量后勤回归和内部验证来识别育种不适的预测因素.
- 利用主要组件和集群分析来定义表型特征,并开发了育种健全性风险指数 (BSRI).
主要成果:
- 渐进的运动性,主要的精子缺陷和阴囊周长是繁殖不适的独立预测因素 (ROC AUC 0.84).
- 确定了三种不同的表型特征 (最佳,中间,关键).
- 该BSRI表现出高的差别性表现和稳定性,使客观风险分层成为可能.
结论:
- 渐进的运动性,主要的精子缺陷和阴囊周长是热带田野环境中繁殖健康的重要指标.
- 该BSRI提供了一个客观的,现场适用的分数,用于 sire 选择和管理.
- 随着年龄的增长和热量负荷对繁殖的稳定性产生了负面影响,突出显示了热带压力的影响.
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