跨THI类的基因型与环境相互作用影响肉幼年时的体重选择
Arícia Chaves Zanetti Reis1, Daniele Botelho Diniz Marques1, Delvan Alves da Silva1
1Federal University of Viçosa (UFV), Department of Animal Science, Viçosa, MG, Brazil.
Poultry science
|June 1, 2025
概括
基因型与环境的相互作用显著影响肉的体重. 温度和湿度指数 (THI) 等环境因素影响遗传选择,特别是在年轻的鸟类中,因此需要考虑它们用于繁殖弹性动物.
科学领域:
- 动物遗传学动物遗传学
- 量化遗传学 量化遗传学
- 环境科学 环境科学
背景情况:
- 基因型与环境的相互作用 (GEI) 对畜牧养殖至关重要.
- 环境因素,如温度和湿度指数 (THI),可以显著影响动物的表现.
- 了解GEI对于开发强大的育种计划至关重要.
研究的目的:
- 调查GEI对肉的体重 (BW) 的影响.
- 分析不同温度和湿度指数 (THI) 类如何影响BW的遗传参数.
- 在不同的环境条件下评估育种价值的稳定性.
主要方法:
- 分析了来自十代肉的BW数据.
- 在两个THI类 (THI1 ≤ 68,THI2 > 68) 下计算BW的变异成分,遗传性和遗传相关性.
- 在THI类的顶级动物中评估等级相关性和普通个体.
主要成果:
- 对BW的遗传概率估计在THI类之间在0.22和0.49之间.
- 早期BW (BW7:0.16) 的THI类之间的遗传相关性较低,而晚期BW (BW42:0.96) 的遗传相关性较高.
- 在THI类中,在较年轻的年龄 (≤21天) 中观察到鸟类繁殖值的显著重新排名,从28天开始稳定.
结论:
- THI在肉BW中显著影响GEI,特别是在早期发展阶段.
- 对于BW的繁殖值可以在不同的THI条件下发生变化,特别是对于年轻的鸟类.
- 将THI纳入选策略对于识别优质和有弹性的肉至关重要.
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