牛奶脂肪酸的育种值与丹麦霍尔斯坦和丹麦泽西的北欧总优点指数特征之间的相关性
A J Buitenhuis1, L Hein2, L P Sørensen2
1Center for Quantitative Genetics and Genomics, Aarhus University, DK-8000 Aarhus C, Denmark.
Journal of dairy science
|June 18, 2023
概括
为特定的乳脂肪酸 (FA) 档案养殖乳牛是可行的,而不会对健康或生产特征产生负面影响. 在FA繁殖值和北欧总优点指数 (NTM) 之间的相关性显示了丹麦霍尔斯坦和丹麦泽西品种有针对性基因选择的潜力.
科学领域:
- 动物遗传学和动物繁殖
- 乳制品科学 乳制品科学
- 营养生物化学 营养生物化学
背景情况:
- 牛奶脂肪酸 (FA) 成分对丹麦乳制品行业越来越重要,影响产品开发和牲畜管理.
- 了解FA组成和育种目标特征之间的遗传相关性对于将FA纳入育种计划至关重要.
研究的目的:
- 估计牛奶FA成分的估计育种值 (EBV) 和丹麦霍尔斯坦 (DH) 和丹麦泽西 (DJ) 品种的北欧总优点指数 (NTM) 中的特征之间的相关性.
- 为了评估改变牛奶脂肪配置的育种的可行性,而不会影响非生产特征.
主要方法:
- 在DH和DJ牛中使用中红外光谱分析了牛奶脂肪成分.
- 估计了单个和分组FA的繁殖值.
- 在每个品种中计算了FA EBV和NTM EBV之间的相关性 (包括生产和非生产特征,如和爪健康).
主要成果:
- 在FA EBV和NTM之间观察到适度的相关性,以及两种品种的生产特征.
- FA EBV和NTM之间的方向相关性在所有品种中都是一致的,只有少数例外 (例如C16:0).
- 对于特定的FA (例如,C18:0与爪子健康) 和乳腺健康指数,DH和DJ品种之间的相关性有显著差异.
结论:
- 对于特定的牛奶脂肪酸成分的遗传选择在DH和DJ品种中都是可能的.
- 为了达到所需的脂肪成分,可以实现繁殖,而不会对包括在繁殖目标中的关键非生产特征产生不利影响.
- 相关性中的品种特异性差异凸显了对量身定制的育种策略的需求.
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