结合卵子大小,胚胎发育和化后肉的温度调节反应,来自年轻和老年育种者的肉
Robson Mateus Freitas Silveira1, Sergio Luís de Castro Junior1, Felipe Dilelis2
1Livestock Environment Center (NUPEA), Department of Biosystems Engineering, "Luiz de Queiroz" College of Agriculture, University of São Paulo (ESALQ/USP), Av. Pádua Dias, 11 - Agronomia, Piracicaba, SP, 13418-900, Brazil.
Poultry science
|January 24, 2026
概括
肉养殖者年龄显著影响卵子特征和胚胎发育,但化后的温度调节和生长受影响较小. 管理应侧重于根据育种者的年龄对卵的分类和化.
科学领域:
- 禽畜科学 禽畜科学 禽畜科学
- 动物育种与遗传学
- 鸟类生理学 鸟类生理学
背景情况:
- 养者年龄是影响肉生殖效率和后代质量的关键因素.
- 了解育种者年龄对蛋特性和化后性能的影响,对于优化肉生产至关重要.
- 之前的研究表明,随着育种年龄的增长,蛋质量和小发育的变化有所不同.
研究的目的:
- 调查 brojiler 育种者年龄 (34 vs. 63 周) 对卵子特征,胚胎发育和化后温度调节反应的影响.
- 确定育种者年龄如何影响热中性条件下的关键化参数和随后的肉 performance.
- 根据育种者年龄,确定影响化成功和化后肉管理的主要因素.
主要方法:
- 进行了两项实验:一项是化期间的卵子特征和胚胎发育,第二项是化后的生长和温度调节.
- 来自34周和63周的繁殖者的卵被化,在特定的化日测量了卵子重量,胚胎重量和长度.
- 幼被养到42天,每周对体重,呼吸速率,气温度和表面温度进行评估.
主要成果:
- 来自较老的繁殖者 (63周) 的卵子的初始和最终重量更大,净重量与胚胎重量比率更高.
- 胚胎的重量和长度随着化日的增加而增加,显示出与育种者年龄的显著相互作用.
- 化后,呼吸速率受育种年龄和养殖周的影响,而眼睛温度显示出较小的育种年龄影响;体重不受育种年龄的影响.
结论:
- 育种者年龄显著影响卵子质量和胚胎生长,需要定制的卵子分类和化策略.
- 化后,在适当的热条件下,肉的温度调节和生长管理对于年轻和老养殖者的小来说可能是相似的.
- 最初的卵体重和化后的体重是管理化和成长阶段的关键变量.
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