牛奶脂肪酸和乳头成分作为肠道甲的代理措施
Timothy P Bilton1, Sharon M Hickey2, Arjan Jonker3
1Invermay Agricultural Centre, AgResearch, Mosgiel 9053, New Zealand.
Journal of dairy science
|March 26, 2025
概括
低甲反动物的繁殖是可能的,使用牛奶或反动物成分作为甲排放的代理措施. 基于牛奶的替代品在选择性育种中更有效,为全球甲减少战略提供了可扩展的解决方案.
科学领域:
- 动物科学动物科学
- 遗传学 是一个遗传学.
- 环境科学 环境科学
背景情况:
- 为了减少反动物的甲排放,基因组选择需要在农场进行广泛的甲测量.
- 目前的甲测量技术对哺乳动物有局限性.
- 乳液发酵影响肠道甲的产生和牛奶的成分,这表明潜在的代理措施.
研究的目的:
- 为了研究不同甲产量的育种对羊的牛皮和牛奶成分的影响.
- 评估乳头和牛奶成分的潜力,作为哺乳母羊中甲排放的代理措施.
主要方法:
- 分析了来自高甲和低甲排放线的400只哺乳母羊的表型和基因型数据.
- 血样本分析了挥发性脂肪酸 (VFA) 和元基因组概况.
- 牛奶样本被分析为脂肪酸概况和中红外 (MIR) 光谱.
主要成果:
- 选择线之间的牛奶脂肪酸概况有所不同,低甲母羊的PUFA和分支链脂肪酸较高,SFA较低.
- 低甲雌羊在体VFA档案中表现出较低的酸盐与酸盐比率.
- 来自牛奶 (脂肪酸,MIR光谱) 和乳头 (VFA,甲基因组学) 的代理测量是遗传的,与测量的甲排放相关.
- 基于牛奶的替代品表现出较高的选择效率 (49%-75%),而不是基于牛奶的替代品 (12%-47%).
结论:
- 牛奶脂肪酸概况,MIR光谱和肠微生物组成可以作为乳哺食动物甲排放的有效代理措施.
- 基于牛奶的替代品为低甲动物的间接选择提供了更有效和有前途的途径.
- 这些代理措施可以显著增加评估的动物数量,促进全球的育种计划,特别是在甲测量基础设施有限的地方.
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