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年轻马的休息红外热学和跳跃比赛中的寿命之间是否存在遗传联系?
Anne Ricard1,2, Séverine Deretz2, Cathy Menard1
1Pole Développement Innovation et Recherche, IFCE, Gouffern en Auge, France.
概括
红外成像揭示了马的表面温度和跳跃中的功能寿命之间的遗传联系. 较低的眼睛温度和特定的脚/背部温度模式可能表明更好的长寿潜力.
科学领域:
- 马类遗传学 马类遗传学
- 动物繁殖 动物繁殖
- 热调节 热调节 热调节
背景情况:
- 功能长寿对于运动马来说至关重要,但其遗传基础尚未完全理解.
- 红外热学提供了一种非侵入性方法来评估表面体温.
- 了解生理特征与表现寿命之间的遗传相关性,可以帮助繁殖策略.
研究的目的:
- 评估年轻马对年轻马感兴趣的特定区域的表面温度与它们在跳跃比赛中的功能寿命之间的遗传关系.
- 评估通过红外成像测量到的温度变量是否可以作为增长寿命的繁殖马的选择标准.
主要方法:
- 红外成像被用来收集921匹年轻马的温度数据,这些马是141匹马的后代,这些马被选定为有利或不利的功能长寿.
- 使用混合效应模型估计了各种温度变量 (平均值,最大值,差异,不对称性,可变性) 的可继承性.
- 多变量后勤回归分析了温度变量与 sire 组 (有利与不利的寿命) 之间的关联.
主要成果:
- 发现了高遗传概率估计的温度的身体区域,如手,子,和脚.
- 对于区域之间的温度差异,观察到较低的遗传性,对于不对称性和可变性,甚至更低.
- 较低的平均/最大眼睛温度,后脚不对称性和背部温度变化与有利于长寿的 sire 组有关.
结论:
- 红外热学显示了作为一种工具的潜力,用于确定与跳跃马的功能寿命相关的选择标准.
- 特定与温度相关的特征,如眼睛温度和脚/背部热模式,可能是长寿的遗传指标.
- 由于该研究的样本大小和协议特异性,在在育种计划中广泛应用之前,需要进行进一步的验证研究.
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