为了更高效的美利诺羊生产,在繁殖时考虑甲,生长和尸体
G Rose1, B Paganoni2, C Macleay2
1School of Veterinary and Life Sciences, Murdoch University, 90 South Street, Murdoch, WA 6150, Australia.
Animal : an international journal of animal bioscience
|November 4, 2024
概括
为了降低料摄入量和甲生产,养殖美利诺羊需要考虑与生长和肉质的遗传联系. 了解这些相关性是澳大利亚可持续绵羊生产的关键.
科学领域:
- 动物遗传学动物遗传学
- 农业科学 农业科学
- 环境科学 环境科学
背景情况:
- 料摄入量,甲生产和料效率对于可持续的绵羊生产至关重要.
- 生产特征和环境影响特征之间的遗传相关性是复杂的.
- 在减少环境足迹的同时平衡生产目标是澳大利亚绵羊业的一个关键挑战.
研究的目的:
- 估计美利诺羊的料摄入量,剩余料摄入量,甲,二氧化碳,氧气,活体重,生长以及脂肪和肌肉深度特征之间的遗传和表型相关性.
- 为了告知育种策略,同时改善生产和环境特征.
- 调查身体成分对料效率和温室气体排放的影响.
主要方法:
- 从西澳大利亚的2,717只美利诺羊 (2010年至2016年) 收集的数据跨越了断奶后,小猪和成年年龄.
- 对各种生产和效率特征的遗传和表型相关性进行了估计.
- 脂肪和肌肉深度测量对活体体重进行了校正.
主要成果:
- 活体体重和生长速度显示,与所有年龄段的料摄入量,剩余料摄入量,甲和二氧化碳有显著的正基因相关性.
- 脂肪和肌肉深度通常与剩余料摄入量,料摄入量和甲有负面的遗传相关性.
- 当脂肪和肌肉在料摄入期的早期被测量时,这些负相关性更强.
结论:
- 育种计划必须考虑到生产特征 (生长,体重) 和效率/环境特征 (料摄入量,甲) 之间的遗传相关性.
- 选择较低的料摄入量和年轻羊的剩余料摄入量可能会影响脂肪沉积.
- 脂肪和肌肉深度是准确估计剩余料摄入量的重要考虑因素,特别是在年轻动物中,以及旨在实现双重目的的育种计划.
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