推断环境和遗传因素对乳牛体细胞数和乳腺炎病原体差异的因果关系,使用结构方程建模
Patricia Wagner1, Kerstin Brügemann1, Tong Yin1
1Institute of Animal Breeding and Genetics, Justus-Liebig-University of Gießen, Ludwigstr. 21b, 35390 Giessen, Germany.
Genes
|November 25, 2023
概括
这项研究模拟了环境和遗传因素如何影响牛健康. 它揭示了住房系统通过生产间接影响乳腺内感染,突出了基因型与环境的相互作用.
科学领域:
- 兽医医学 兽医医学 兽医医学
- 动物遗传学动物遗传学
- 乳制品科学 乳制品科学
背景情况:
- 乳牛的健康对于乳牛的福利和生产力至关重要.
- 了解影响乳健康的环境和遗传因素之间的相互作用是复杂的.
- 以前的研究已经确定了乳腺炎的遗传标志物,但缺乏全面的因果模型.
研究的目的:
- 开发和验证结构方程模型 (SEM),以阐明环境和遗传因素影响荷尔斯坦弗里西亚牛乳液健康之间的因果关系.
- 量化住房系统对乳内感染 (IMI) 和产生的直接和间接影响.
- 确定特定的遗传标记物及其与影响乳健康的环境因素的相互作用.
主要方法:
- 利用了来自537头荷尔斯坦弗里西亚牛的数据,包括基因型和牛奶样本分析.
- 开发了一个结构方程模型,其中包含了潜在变量:乳内感染 (IMI),生产,时间和遗传学.
- 纳入明显变量,如乳病原体,体细胞计数,牛奶成分和显著的SNP标记.
主要成果:
- 住房系统对IMI有很小的直接影响 (-0.05),但对生产有显著的积极影响 (0.37).
- 生产显著影响IMI (0.17),建立住房和乳腺健康之间的间接联系.
- 观察到基因型与环境的相互作用,与特定的住房系统相关的特定遗传标记 (SNP).
- 参与MAPK1信号通路的*EVA1A*基因中的一个关键SNP被确定为乳腺健康遗传学的重要因素.
结论:
- 结构方程建模有效地通过生产推断住房系统和乳腺健康之间的间接关联.
- 基因型与环境的相互作用在乳健康中起着重要作用,需要进行系统特定的遗传评估.
- *EVA1A*基因和MAPK1信号通路是通过遗传选择改善乳腺健康的关键目标.
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