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美国乳山羊的生殖特征和体细胞评分的遗传参数

Estefania Aguirre-Arroyo¹, Vielka J Castañeda-Bustos², Alma A Lechuga-Arana³

¹División de Ciencias de la Vida, Universidad de Guanajuato, Irapuato, Guanajuato, Mexico.

Tropical animal health and production

|May 20, 2024

概括

这项研究估计了山羊生殖特征和体细胞评分的遗传参数,揭示了可以优化育种计划的趋势. 一些品种的体细胞分数的负遗传趋势为生产者带来了好处.

科学领域:

动物遗传学动物遗传学
生殖生物学生殖生物学
乳制品科学乳制品科学

背景情况:

优化山羊选择方案需要了解生殖特征和体细胞评分的遗传参数.
关于山羊第一次开玩笑时的年龄 (AFK),开玩笑间隔 (KIN) 和体细胞分数 (SCS) 的遗传趋势的研究有限.

研究的目的:

估计七种美国山羊品种和一组全品种的AFK,KIN和SCS的遗传参数和趋势.
分析不同品种中这些特征之间的遗传相关性.

主要方法:

使用三种动物模型的限制最大概率 (REML) 方法.
使用回归模型估计的遗传和表型趋势.
在努比亚人,阿尔卑斯人,拉曼查人,托根堡人,萨恩人,尼日利亚矮人和奥伯哈斯利人品种中进行分析.

主要成果:

在全品种组中,AFK,KIN和SCS的遗传概率估计分别为0.28,0.04和0.22.
在AFK和KIN (0.07),AFK和SCS (0.12),以及SCS和KIN (-0.15到0.44) 之间发现了显著的遗传相关性.
在Saanen山羊中观察到KIN的积极遗传趋势,而努比亚,阿尔卑斯山和尼日利亚矮人品种显示出SCS的有益负面遗传趋势.

结论:

这项研究提供了对美国山羊关键生殖和健康特征的遗传参数和趋势的首次估计.
确定了AFK,KIN和SCS之间的有利和不利的遗传关系,这对于有针对性的选择至关重要.
在SCS的负面遗传趋势表明,在特定的山羊种群中,改善乳腺健康的潜力.

关键词:

一开始的年龄开玩笑遗传相关性遗传相关性遗传性遗传性是可以继承的.玩笑的时间间隔.阴茎健康问题阴茎健康问题

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