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牛奶转录组生物标记物识别,以提高料效率并降低乳母羊的营养成本
A Suárez-Vega1, B Gutiérrez-Gil1, P A S Fonseca1
1Dpto. Producción Animal, Facultad de Veterinaria, Universidad de León, Campus de Vegazana s/n, 24007 Leon, Spain.
Animal : an international journal of animal bioscience
|August 3, 2024
概括
营养蛋白质限制没有影响奶羊的表现或料效率 (FE). 然而,转录组分析揭示了不同FE的母羊的独特基因表达模式,这表明使用牛奶基因表达作为FE的预测因素的潜力.
科学领域:
- 动物科学动物科学
- 基因组学就是基因组学.
- 营养生物化学 营养生物化学
背景情况:
- 料成本的上升需要提高奶羊的料效率 (FE).
- 影响FE的营养策略和遗传因素需要进一步调查.
研究的目的:
- 研究青春期前营养蛋白质限制 (NPR) 对乳母羊乳转录组和FE的影响.
- 通过使用料转换比率 (FCR) 和剩余料摄入量 (RFI) 来评估具有不同FE的母羊之间的基因表达差异.
- 评估牛奶基因表达作为FE表型的预测因子.
主要方法:
- 在NPR和对照羊之间比较了转录基因特征.
- 分析了不同FE (高与低FCR和RFI) 的母羊的基因表达.
- 利用RNA测序和随机森林分析来识别差异表达基因 (DEG) 并预测FE.
主要成果:
- 青春期前的NPR没有影响牛奶性能或FE.
- 在NPR和对照组之间,只有一个基因 (HBB) 的表达差异.
- 在不同的 FE 组之间确定了大量的 DEG,共识分类产生了最明显的转录基因特征 (1,016 DEG).
- 高FE母羊中过度表达的基因与牛奶产量有关,而低FE母羊显示了与组织修复代谢支出相关的基因.
- 一组44个基因以中等准确度预测了FE表型 (Spearman相关性为FCR的0.37和RFI的0.22).
结论:
- 在青春期前期限制营养蛋白质并不是改善乳制羊FE的有效策略.
- 牛奶的转录基因分析显示,不同料效率的母羊之间存在显著差异.
- 牛奶基因表达具有作为预测奶羊料效率的非侵入性生物标志物的潜力,有助于可持续的畜牧业.
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