对Angus牛的和血寄生虫负担的遗传参数的估计
Gabriela David1, Cherlynn Daniela da Silva Arce1, Francisco Ribeiro de Araujo Neto2
1Departamento de Zootecnia, Universidade Estadual Paulista-UNESP, Jaboticabal, São Paulo, Brazil.
Tropical animal health and production
|September 19, 2023
概括
估计牛 (CRM) 和血寄生虫负担 (Babesia bigemina,Babesia bovis,Anaplasma marginale) 的遗传参数在格斯雌性中是可能的. 基于这些特征的选择可能会产生小的遗传收益,从而改善牛的健康状况.
科学领域:
- 动物遗传学动物遗传学
- 兽医寄生虫学 兽医寄生虫学
- 量化遗传学 量化遗传学
背景情况:
- 牛热是由血寄生虫如Babesia和Anaplasma引起的,影响牛的健康和生产力.
- 巴西的安格斯雌性对这些疾病很容易感染,因此需要对抗性进行遗传评估.
- 了解遗传和表型参数对于育种计划至关重要.
研究的目的:
- 为了估计牛 (CRM) 负担的遗传和表型参数.
- 为了估计血寄生虫负担的遗传和表型参数 (Babesia bigemina,Babesia bovis,Anaplasma marginale).
- 为了评估巴西Angus雌性中遗传选择的潜力.
主要方法:
- 利用贝叶斯推理和吉布斯采样来估计差异组件.
- 采用多特征动物模型进行全面分析.
- 分析了来自Angus雌性在虫传播疾病的特有不稳定性地区的数据.
主要成果:
- 对CRM和血寄生虫负担的遗传概率估计较低,从0.03 (Babesia bovis) 到0.16 (CRM) 之间.
- 重复性估计值从0.07 (Babesia bovis) 到0.21 (CRM) 之间有所不同.
- 特征之间的遗传相关性范围从低 (-0.01) 到中等 (0.55).
结论:
- 数和血寄生虫感染水平可以被视为选择标准.
- 基于这些特征的遗传选择是可行的,尽管预期的收益可能很小.
- 这些发现支持开发育种策略,以提高安格斯牛的抗病能力.
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