环境温度对子生长性能,肌肉纤维结构,脂肪酸成分和基因表达的影响
Ziyi Pan1, Congcong Xu1, Dongyue Sun1
1Institute of Animal Science, Jiangsu Academy of Agricultural Science, Nanjing, 210014, PR China.
Poultry science
|April 28, 2025
概括
环境温度显著影响子的生长,肌肉纤维特性和脂肪酸特征. 较低的温度 (20°C) 促进更好的生长,并改变肌肉结构和脂质组成相比较于更温暖的条件 (29°C).
科学领域:
- 动物科学动物科学
- 养家禽生产 养家禽生产
- 营养生理学 营养生理学
背景情况:
- 环境温度是影响牲畜生理学和表现的关键因素.
- 了解温度对子的影响对于优化肉类生产和质量至关重要.
研究的目的:
- 研究不同环境温度 (20°C与29°C) 对子生长,肌肉纤维特性,脂肪酸成分和基因表达的影响.
- 确定调节这些对环境温度反应的关键分子机制.
主要方法:
- 子 (n=72) 在20°C (T20) 或29°C (T29) 的控制环境中从21天到42天的年龄生长.
- 评估的生长性能 (体重,BWG,ADG,ADFI),胸部肌肉纤维结构 (直径,面积,密度) 和脂肪酸概况.
- 利用转录组分析 (RNA-Seq) 和定量PCR (qPCR) 来分析基因表达模式,重点关注细胞周期和PPAR信号通路.
主要成果:
- 与29°C的相比,20°C的体体重,BWG,ADG和ADFI显著更高.
- 较低的温度 (20°C) 导致肌肉纤维直径/面积减少,纤维密度增加.
- 观察到脂肪酸成分的显著差异,20°C的子具有更高的SFA,MUFA和PUFA水平,并且 ω-6/ω-3比率较低.
结论:
- 环境温度深刻影响子的生长性能,肌肉纤维形态和脂质代谢.
- 基因表达分析揭示了细胞循环途径,包括像CDC45和CDT1这样的基因,对于温度介导的适应至关重要.
- 结果为优化环境条件提供了见解,以提高肉质量和生产效率.
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