功能长寿的遗传参数和相关特征在意大利夏洛莱和车品种
Simone Callegaro1, Francesco Tiezzi1, Christian Maltecca1,2
1Department of Agriculture, Food, Environment, and Forestry (DAGRI), University of Florence, Florence 50144, Italy.
Journal of animal science
|November 18, 2024
概括
在意大利的肉牛中,对奶牛寿命的遗传改进是可行的. 在多个产卵中为稳定性 (STAY) 选择雌雄,可以提高群体的利能力和弹性,特别是在Limousine和Charolais品种中.
科学领域:
- 动物遗传学动物遗传学
- 量化遗传学 量化遗传学
- 牛肉牛的繁殖 牛肉牛的繁殖
背景情况:
- 稳定性 (STAY) 对于农场的利能力至关重要,它代表了奶牛在牛群中保持生产力的概率.
- 估计STAY的遗传参数及其与其他特征的关系对于改善寿命至关重要.
- 之前的研究并没有完全探索使用先进的基因组预测模型跨越不同的分娩间隔的STAY.
研究的目的:
- 为了估计意大利夏洛莱和利木辛肉牛在各个分娩阶段的稳定性 (STAY) 的遗传参数.
- 调查STAY和生育/形状特征之间的遗传相关性.
- 评估STAY选择对经济重要特征和群体长寿的影响.
主要方法:
- 采用单步基因组最佳线性无偏预测 (ssGBLUP) 方法.
- 对比高斯线性和值动物模型来估计遗传参数.
- 在大型数据集中利用双变体模型分析STAY,生育能力和形状特征之间的遗传相关性.
主要成果:
- 对STAY的遗传概率估计表明,这两种品种都有可能进行遗传改进.
- 根据STAY,特别是对于后来的产卵来说,根据STAY而重新排名子,表明STAY特征的遗传区别.
- 在Limousine中观察到STAY和形状特征之间的积极遗传相关性;Charolais显示出多种相关性,凸性与STAY负相关.
结论:
- 稳定性基因选择 (STAY) 是提高意大利肉牛寿命的可行策略.
- 为长期改善群体,建议在多个产卵中选择高基因组育种值STAY.
- 形状特征可以影响群体的生存;选择策略应考虑品种特异性与STAY的相关性,以获得最佳结果.
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