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在使用非线性生长模型和温度-湿度指数的本土热耐受性的遗传观点
Wipas Loengbudnark1, Vibuntita Chankitisakul2, Wuttigrai Boonkum2
1Department of Animal Science, Faculty of Agriculture, Khon Kaen University, Khon Kaen 40002, Thailand.
Poultry science
|June 17, 2025
概括
形模型最好估计 Pradu Hang Dum 的生长速度,而热应激效应则出现在 27 的温度湿度指数 (THI) 周围,影响遗传生长潜力.
科学领域:
- 禽畜科学 禽畜科学 禽畜科学
- 动物生理学 动物生理学
- 环境压力生物学
背景情况:
- 普拉杜 (Pradu Hang Dum) 在整个生长期内,在体重方面表现出两性变异.
- 了解生长动态和环境影响对于优化家禽生产至关重要.
研究的目的:
- 为了确定最佳的非线性模型 (Gompertz vs. sinusoidal) 来估计普拉杜杭杜姆的绝对生长率 (AGR).
- 为了确定最合适的温度-湿度指数 (THI) 方程来评估这种品种的热应激.
- 在不同的热条件下分析AGR,THI和遗传参数之间的关系.
主要方法:
- 普拉杜杭杜姆的生长表现从化到16周被监测.
- 绝对增长率 (AGR) 估计使用Gompertz和状增长模型.
- 使用回归分析来适应各种THI方程,并评估热应力对AGR和遗传性的影响.
主要成果:
- 与Gompertz模型相比,正弦形模型对AGR估计具有更好的适应性.
- 陶和新 (2003) 的THI2方程被确定为热应力分析中最合适的方程.
- 热应激对生长表现的影响在THI值27左右显而易见,在THI水平较高时遗传能力下降.
结论:
- 形模型提供了一种可靠的方法来跟踪的生长动态.
- 需要有效的管理策略来减轻热应激,这会对普拉杜的生长性能和遗传潜力产生负面影响.
- 进一步的研究对于开发环境压力下家禽生产的可持续解决方案至关重要.
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