子母猪的育种价值对母性能力来说,可以降低在自由生育中的小猪死亡率
Chiara Lipori1, Inonge Reimert1, Egbert F Knol2
1Adaptation Physiology Group, Wageningen University & Research, Wageningen, The Netherlands.
Journal of animal science
|April 30, 2025
概括
选择具有高遗传能力的母猪 (EBVma),可以减少自由生育系统中的小猪死亡率. 高EBVma与较低的母猪粉碎率和改善的存活率有关,这表明它在各种繁殖环境中的预测价值.
科学领域:
- 动物科学动物科学
- 遗传学 是一个遗传学.
- 生殖生物学 生殖生物学
背景情况:
- 自由生育 (FF) 系统旨在改善母猪福利,但可以增加小猪的死亡率.
- 母性能力的遗传选择,反映在母性能力的估计育种值 (EBVma) 中,是一种减轻小猪损失的策略.
- 目前的EBVma估计依赖于传统的生育箱,需要在FF环境中进行验证.
研究的目的:
- 为了评估EBVma的预测准确度,从箱子系统中获得,用于在自由生育环境中对小猪的死亡率和生育性能.
- 为了比较EBVma对小猪生存和粉碎在自由繁殖和临时箱系统的影响.
主要方法:
- 在分娩后的前五天,56头母母被分配到自由养 (FF) 或临时养 (TC) 条件中.
- 估计的育种值为母性能力 (EBVma) 为每个母猪计算.
- 在EBVma和住房系统中记录和分析了小猪的死亡率,死胎,粉碎率和繁殖时间.
主要成果:
- 在FF系统中,较高的EBVma与降低幼猪早期死亡率 (在5天内) 显著相关 (P=0.003).
- 在FF (P=0.01) 和TC (P=0.02) 系统中,高EBVma母猪的猪粉碎率低于低EBVma母猪.
- 较高的EBVma也与死亡出生的可能性降低相关 (P=0.02).
- 猪的死亡率在FF (14.2%) 高于TC (5.9%),粉碎是FF的主要原因.
结论:
- 估计的母性能力育种值 (EBVma) 有效预测自由生育系统中的小猪生存率.
- 对母性能力的遗传选择是减少小猪死亡率的可行策略,特别是在自由生育环境中粉碎.
- 在不同的繁殖住房系统中,EBVma保留了其预测价值,支持其在遗传改进计划中的使用.
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