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在内蒙古白色喀什米尔山羊 (厄兰山类型) 的生长特征遗传参数估计

Yue Shi¹, Yan Liu², Yunpeng Qi³

¹College of Animal Science, Inner Mongolia Agricultural University, Hohhot 010018, China.

Animals : an open access journal from MDPI

|June 13, 2025

概括

这项研究估计了内蒙古白色喀什米尔山羊 (IMWCG-ER) 的生长特征的遗传参数. 遗传性估计有所不同,在出生体重和断奶前的每日体重增加之间观察到显著的遗传相关性.

科学领域:

动物遗传学和动物繁殖
量化遗传学量化遗传学
畜牧业生产畜牧业生产

背景情况:

内蒙古白色喀什米尔山羊 (埃兰山类型) (IMWCG-ER) 是一种有价值的牲畜品种.
了解生长特征的遗传参数对于选择性育种计划至关重要.
之前对IMWCG-ER生长特征遗传学的研究是有限的.

研究的目的:

估计IMWCG-ER中关键生长特征的变异性,遗传性和遗传相关性.
为了确定最佳的动物模型,以此品种的遗传参数估计.
为IMWCG-ER.提供数据,以改善IMWCG-ER.的育种策略.

主要方法:

分析2022-2023年生长数据 (出生体重,断奶体重,断奶前每日增长,12个月体重).
限制最大概率 (REML) 在单个和多特征动物模型中的应用.
六种不同的模型的比较,包括母亲的影响和相互作用,使用概率比,AIC和BIC测试.

主要成果:

遗传概率估计:出生体重 (0.3884),断奶体重 (0.2951),断奶前每日增加 (0.2749),12个月体重 (0.2192).
遗传相关性在 -0.8700 到 0.5529 之间,出生体重和断奶前的每日体重增加 (-0.8700) 之间是最强的负相关性.
现型相关性在 -0.7906 到 0.3562 之间,出生体重和断奶前每日体重增加 (-0.7906) 之间是最大的负相关性.

结论:

在IMWCG-ER中,生长特征表现出中度的遗传性.
早期生长和出生体重之间存在显著的遗传对立,这表明复杂的遗传控制.
这些发现支持在IMWCG-ER中使用遗传参数估计来做出明智的育种决定.

关键词:

内蒙古白色的喀什米尔山羊,白色的喀什米尔山羊.遗传参数遗传参数增长的特征增长的特征变异元件的变异元件是什么

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