β-casein 基因型对牛奶的物理化学性质和功能的影响
N Gai1, T Uniacke-Lowe1, J O'Regan2
1School of Food and Nutritional Sciences, University College Cork, Cork, T12 YN60, Ireland.
Journal of dairy science
|August 29, 2023
概括
牛奶蛋白的遗传变异会影响牛奶的特性. A1A1牛奶对奶酪具有更好的凝固性,而A2A2牛奶对酸奶等产品提供更好的稳定性.
科学领域:
- 乳制品科学 乳制品科学
- 动物遗传学动物遗传学
- 食品化学 食品化学
背景情况:
- 牛奶蛋白的遗传变异影响牛奶的物理化学特性和功能.
- 贝塔-素 (β-素) 有两个主要的遗传变异:A1和A2.
研究的目的:
- 分析基于β-素变体 (A1A1,A1A2,A2A2) 的牛奶的物理化学特性.
- 确定这些变体对牛奶加工和产品开发的影响.
主要方法:
- 从具有不同β-casein基因型 (A1A1,A1A2,A2A2) 的牛奶中分析牛奶的物理化学特性.
- 评估了三次分别采集的牛奶样本.
主要成果:
- 与A1A2和A2A2牛奶相比,A1A1牛奶的含量更高,pH值更低.
- A1A1牛奶表现出更好的乳汁和酸凝固特性.
- A2A2牛奶对奶油的稳定性更高,可能是由于脂肪球体尺寸较小.
结论:
- 来自A1A1基因型奶牛的牛奶由于凝固的增强而适合制造奶酪.
- 来自A2A2基因型奶牛的牛奶是理想的产品,需要奶油稳定性,如酸奶,可能提供更好的消化能力.
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