在韩国霍尔斯坦牛群中,直接和母性遗传成分的遗传参数,用于韩国霍尔斯坦牛群的分娩容易度,使用动物模型
Mahboob Alam1, Jae-Gu Lee1, Chang-Gwon Dang1
1Animal Breeding and Genetics Division, National Institute of Animal Science, Rural Development Administration, Cheonan 31000, Korea.
Animal bioscience
|October 15, 2024
概括
这项研究使用动物模型评估了韩国霍尔施泰因 (Holstein) 牛犊生育容易 (CE) 的遗传参数. 模型M2和M3为常规CE评估提供了最现实的和可靠的估计.
科学领域:
- 动物遗传学动物遗传学
- 量化遗传学 量化遗传学
- 畜牧养殖 畜牧养殖 畜牧养殖
背景情况:
- 产容易 (CE) 是乳牛养殖的一个关键特征.
- 精确的CE遗传评估对于改善群体健康和生产力至关重要.
- 韩国霍尔斯坦种群需要特定的遗传参数估计,以实现有效的繁殖计划.
研究的目的:
- 为了研究韩国Holsteins.在生育容易 (CE) 的遗传参数.
- 为了确定最适合于该品种的常规CE评价的动物模型.
主要方法:
- 利用了两种表型数据集 (DS5,DS10) 关于韩国霍尔斯坦第一个平价小牛的CE.
- 采用了四种动物模型 (M1-M4),对母体产生了影响,根据当代的群体定义而有所不同.
- 使用BLUPF90+软件估计遗传变异和共变异.
主要成果:
- 对CE的直接遗传性 (h2) 估计在0.005到0.234.4之间.
- 母亲遗传率估计较低 (0.001至0.090).
- 与M1和M4.4相比,M2和M3模型表现出更大的现实性和更好地处理数据复杂性.
结论:
- 这项研究为韩国Holstein CE评估的动物模型提供了开创性的见解.
- 遗传参数估计表明,在这个人群中,CE的选择进展较慢.
- 推M2和M3模型用于常规CE评估开发.
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