在巴登-维尔堡的3种乳牛品种中,弹性指标的特征
F Keßler1, R Wellmann1, M G G Chagunda2
1Institute of Animal Science, University of Hohenheim, 70599 Stuttgart, Germany.
Journal of dairy science
|February 4, 2024
概括
用牛奶产量时间序列分析来评估奶牛的弹性. 相对牛奶产量差异指标显示出更高的遗传性,并且比绝对指标更适合繁殖.
科学领域:
- 动物育种与遗传学
- 乳制品科学 乳制品科学
- 量化遗传学 量化遗传学
背景情况:
- 动物育种越来越多地关注强壮,高产的牲畜的弹性.
- 对指标特征的时间序列分析,如牛奶产量变异和自相关性,是评估弹性的一种关键方法.
- 本研究将这些方法应用于德国奶牛种群.
研究的目的:
- 用牛奶产量时间序列数据评估德国奶牛的弹性.
- 为了比较不同弹性指标特征的遗传性和适合性,用于繁殖.
- 为了调查品种特定的弹性差异.
主要方法:
- 利用了来自德国霍尔斯坦,弗莱克维和布朗瑞士品种的13949次哺乳期的牛奶产量数据.
- 计算的绝对每日牛奶产量,与预期产量的偏差以及相对的牛奶产量.
- 分析了这些牛奶产量数据的变异性和自相关性,作为遗传性估计的表型.
主要成果:
- 自相关性遗传概率估计为0.047,而基于差异的特征则在0.026到0.183.3之间.
- 德国棕色瑞士人表现出更好的弹性趋势.
- 相对的每日牛奶产量差异指标显示出更高的遗传性,并且与绝对指标相比,性能水平的影响较小.
结论:
- 从相对牛奶产量中获得的弹性指标特征对育种计划来说更具遗传性和实用性.
- 在性方面存在品种差异,具有潜在的遗传和环境贡献.
- 需要进一步的研究来将弹性指标与功能和健康特征相关联.
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