在澳大利亚乳牛中有害的衰退性缺陷的归算精度和载体频率
I van den Berg1, T V Nguyen1, T T T Nguyen2
1Agriculture Victoria, AgriBio, Centre for AgriBioscience, Bundoora, Victoria 3083, Australia.
Journal of dairy science
|June 30, 2024
概括
乳牛的基因定型准确地预测了有害的衰退突变的携带者,即使确切的原因尚不清楚. 这允许成本有效的管理,以减少群体中的遗传缺陷.
科学领域:
- 动物遗传学动物遗传学
- 乳牛养殖 乳牛养殖 乳牛养殖
- 生殖生物学 生殖生物学
背景情况:
- 影响生育能力和生存能力的衰退性突变在乳牛中普遍存在.
- 人工授精加速了这些有害突变在全球的传播.
- 当前的基因测试可能是昂贵的,如果没有集成到标准的SNP面板.
研究的目的:
- 评估归因因果突变对澳大利亚乳牛中衰退性有害条件的准确性.
- 预测澳大利亚霍尔斯坦,泽西和红色品种已知的衰退有害条件的载体状态.
- 为了追踪这些突变,随着时间的推移,载波频率的变化.
主要方法:
- 使用F1统计 (精度和回忆) 来评估载体状态预测的准确性.
- 使用标准SNP面板对已知突变的假定载体状态.
- 采用标记物哈普类型来预测在面板上缺乏因果突变的疾病的载体状态.
主要成果:
- 在荷尔斯坦州和泽西州的牛中确切地归纳已知的有害突变 (F1:0.880.99).
- 使用非SNP面板缺陷的哈普类型进行有效载体状态预测 (F1:0.910.92).
- 大多数突变显示载体频率稳定或下降,但有些增加,需要检测载体.
结论:
- 凭算和基于哈普洛型的预测为奶牛养殖者提供了准确,具有成本效益的载体状态评估.
- 监测载体频率对于管理遗传疾病和减少风险交配至关重要.
- 早期检测新的突变,如牛淋巴细胞肠保留缺陷,至关重要.
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