甲排放是否在年轻公牛和哺乳乳奶牛中具有遗传相同的特征?
B Heringstad1,2, K A Bakke2
1Department of Animal and Aquacultural Sciences, Faculty of Biosciences, Norwegian University of Life Sciences, 1432 Ås, Norway.
JDS communications
|September 9, 2025
概括
估计了年轻公牛和哺乳母牛中甲 (CH4) 排放之间的遗传相关性. 结果表明,对年轻公牛的表型定型对于对挪威红牛甲排放的遗传评估有价值.
科学领域:
- 动物遗传学动物遗传学
- 环境科学 环境科学
- 农业科学 农业科学
背景情况:
- 甲 (CH4) 是一种强大的温室气体,通过反动物的肠道发酵排放出来.
- 了解CH4排放的遗传基础对于制定畜牧业减缓战略至关重要.
- 以前的研究还没有完全阐明CH4排放是否是牛在不同生命阶段的一致的遗传特征.
研究的目的:
- 为了估计年轻的挪威红牛和哺乳乳奶牛之间的甲 (CH4) 排放的遗传相关性.
- 评估使用年轻公牛进行遗传选择以减少挪威红色品种中CH4排放的潜力.
主要方法:
- 从2020年到2023年,使用GreenFeed (GF) 单位测量了甲 (CH4) 排放量.
- 数据包括1,370头哺乳母牛的771,989次GF访问和244头年轻公牛 (11-12个月大) 的112,071次GF访问.
- 为了估计遗传性和遗传相关性,采用了两种变异的线性动物重复性模型.
主要成果:
- 对CH4排放的遗传概率估计为0.39 (SE 0.04) 对于奶牛和0.49 (SE 0.15) 对于年轻的公牛.
- 年轻公牛和哺乳母牛中CH4排放之间的估计遗传相关性为0.63 (SE 0.22).
- 虽然不完全相同,但温和的遗传相关性表明使用年轻公牛进行选择的可能性.
结论:
- 对年轻的挪威红牛进行CH4排放的表型化是基因改进计划的有价值策略.
- 基于年轻公牛的选择可以有助于减少挪威红种群的整体甲排放.
- 建议使用更大的数据集进行进一步研究,以完善遗传相关性估计.
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