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遗传评估纳洛尔雌性中的体重,尸体和稳定性

Isabella Silva de Carvalho¹, Sirlene Fernandes Lázaro², Eula Regina Carrara³

¹Faculdade de Ciências Agrárias e Veterinárias, UNESP, Jaboticabal, Brazil.

Journal of animal breeding and genetics = Zeitschrift fur Tierzuchtung und Zuchtungsbiologie

|May 9, 2025

概括

这项研究分析了Nelore牛的生长,尸体和稳定性特征,发现生长和尸体特征的适度遗传性,表明基因改进的良好潜力. 环境因素显著影响腰部眼部区域和稳定性等特征.

科学领域:

动物遗传学和动物繁殖
量化遗传学量化遗传学
畜牧生产系统畜牧生产系统

背景情况:

尼洛尔牛生产的利能力和可持续性取决于生长,尸体质量和稳定性等特征.
估计这些特征的遗传参数对于有效的育种计划至关重要.

研究的目的:

估计Nelore牛的生长,尸体和稳定性特征的遗传性和遗传/环境相关性.
为优化 Nelore 牛生产中的育种策略提供见解.

主要方法:

用于参数估计的贝叶斯方法.
对包括体重 (W210,W365,W450),腰眼区域 (LEA),脂肪厚度 (LFT,REFT) 和稳定性 (STAY48,STAY54,STAY72) 在内的多个特征进行了大量数据集 (94,703名女性) 的分析.

主要成果:

遗传概率估计有所不同:对于部脂肪厚度 (REFT,0.43) 和72个月的稳定性 (STAY72,0.18 ± 0.02),均为中等,但对于腰部眼部区域 (LEA,0.14 ± 0.03) 则较低.
观察到生长和尸体特征的总体上是积极的遗传趋势,通过选择可以获得显著的收益.
环境因素被发现对遗传性较低的特征有影响,例如LEA和稳定性.

结论:

选择与体重相关的特征是有效的,因为它们的适度遗传性和积极的遗传趋势.
环境管理在改善低遗传性特征 (如腰部眼部区域和Nelore牛的稳定性) 中发挥着重要作用.
这些发现支持有针对性的育种策略,以提高尼洛尔牛的生产效率和可持续性.

关键词:

吉布斯 (GIBBS) 公司动物育种动物育种动物.遗传趋势遗传趋势遗传性遗传性遗传性选择效率的选择效率

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