加拿大杜洛克猪的料效率,生长性能和养行为特征的遗传参数
Duy Ngoc Do1, Mohsen Jafarikia1,2,3, Laurence Maignel2
1Department of Animal Science and Aquaculture, Dalhousie University, Truro, NS, Canada.
Journal of animal science
|February 2, 2026
概括
剩余料摄入量 (RFI) 是比料转换比率 (FCR) 更有效提高猪料效率的特征. 选择RFI可以提高料的利用率,而不会对生长或尸体质量产生负面影响.
科学领域:
- 动物科学动物科学
- 遗传学 是一个遗传学.
- 农业经济学 农业经济学
背景情况:
- 料成本是猪生产利能力的一个主要因素.
- 提高料效率 (FE) 对于经济可行性至关重要.
- 了解FE,生长和养行为特征之间的遗传和表型相关性是必不可少的.
研究的目的:
- 模拟猪中的各种料效率特征.
- 估计料效率,生长和养行为特征之间的表型和遗传相关性.
- 确定最佳的选择标准,以提高猪的料效率.
主要方法:
- 利用了来自14939头杜洛克猪的数据.
- 使用ASReml-R版本4.2估计的遗传参数.
- 模拟的料效率特征,包括料转换比率 (FCR) 和六项剩余料摄入量 (RFI1-6).
- 分析了养行为特征,如每天的访问 (NVD) 和花费在饮食上的时间 (TPD).
主要成果:
- 料效率特征表现出中度的遗传性.
- 剩余料摄入 (RFI) 与生长特征具有有利的遗传相关性,与尸体特征 (背部脂肪厚度和腰部深度) 具有最小的负相关性.
- 料转化率 (FCR) 与平均每日增量,背部脂肪厚度和腰部深度有显著的遗传相关性.
- 料效率特征与养行为特征的遗传相关性较弱.
结论:
- 与FCR相比,剩余料摄入 (RFI) 是提高料效率的更有利的选择标准.
- RFI选择可以提高料利用率,而不会影响生长性能或尸体质量.
- RFI和养行为之间的弱相关性表明,选择RFI不会导致意外的行为后果.
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