开发基于营养基因组的精密管理模型,用于汉牛
Chandima Gajaweera1,2, Dong Hun Kang3, Doo Ho Lee1
1Division of Animal and Dairy Science, Chungnam National University, Daejeon 34134, Korea.
Journal of animal science and technology
|June 19, 2023
概括
选择基于遗传优点的Hanwoo牛,以获得大理石评分 (MS),可以显著提高尸体质量等级. 饮食能量水平没有影响MS,但遗传分组提高了20%的更高质量等级.
科学领域:
- 动物科学动物科学
- 遗传学 是一个遗传学.
- 营养学就是营养学.
- 精准畜牧养殖 精准畜牧养殖 精准畜牧养殖
背景情况:
- 韩华料区系统的目标是使用高能量的食来实现高石沉积.
- 个体遗传变异导致~40%的汉武牛获得劣质等级,尽管资源分配均.
- 开发营养基因精度管理模型对于优化汉生产至关重要.
研究的目的:
- 在不同的食总可消化营养素 (TDN) 水平下,评估对不同基因优点的基因评分 (MS) 的分离选择的反应.
- 开发一个基于营养基因组的 Hanwoo 方向盘精度管理模型.
- 评估遗传分组和饮食能量对尸体质量和背部脂肪厚度的影响.
主要方法:
- 111只汉武小牛被基因定型并根据MS的估计育种价值 (EBV) 分组 (高与低).
- 在不同的肥期内,动物在两种饮食TDN水平 (2x2因数排列) 下进行管理.
- 尸体评估包括MS,背部脂肪厚度 (BFT) 和韩国牛肉质量分级标准.
主要成果:
- 对MS-EBV选择的直接反应显著,证实了初始遗传分组的重要性.
- 饮食中的TDN水平没有显著影响MS或BFT (p>0.05),也没有观察到显著的基因与营养相互作用.
- 针对MS-EBV的初始遗传分组使高质量等级 (QG1++,QG1+) 的尸体比例增加了约20%.
结论:
- 基于MS-EBV的选择可以提高马尔布化得分,而不会对Hanwoo牛的背部脂肪厚度产生负面影响.
- 针对MS-EBV的初始遗传分组系统是改善Hanwoo养场利能力的关键策略.
- 进一步增加饮食能量可能会增加高基因组内QG 1++动物的比例.
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