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动物作为解决方案II:低牛奶尿素A1PF乳牛的表型

Fabiellen C Pereira¹, Sagara Kumara¹, Anita Fleming¹

¹Department of Agricultural Sciences, Faculty of Agricultural and Life Sciences, Lincoln University, Lincoln, P.O. Box 85084, Christchurch 7647, New Zealand.

Animals : an open access journal from MDPI

|January 11, 2025

概括

在乳牛群中识别低乳尿素 (MUN) 奶牛提供了一种减少 (N) 排泄和环境影响的策略. 这种表型化方法可以帮助选择用于旨在可持续乳制品养殖的育种计划的奶牛.

科学领域:

动物科学动物科学
环境科学环境科学
乳制品营养乳制品营养

背景情况:

密集的牧场奶制面临着减少 (N) 排泄的压力.
牛在代谢中的个体差异为有针对性的管理提供了机会.
减少泄露和排放对于温带地区的乳制品系统至关重要.

研究的目的:

为了探索用于识别A1PF (α-1-蛋白质果糖) 牛的表型化,不同牛奶尿素 (MUN) 度.
评估选择低MUN奶牛以减轻新西兰乳制品系统中N损失的可行性.

主要方法:

根据极低和极高的 MUN 度,从 A1PF 群体中选择了 200 头母牛.
在哺乳期中期和晚期收集牛奶,尿液和血液样本进行N分析,牛奶固体和抗氧化剂.
分析了牛奶尿素 (MUN),尿液N (UN),血尿素N,总抗氧化剂 (TAS) 和谷氨过氧化酶 (GPx).

主要成果:

与低MUN的奶牛相比,高MUN的奶牛表现出更高的MUN和UN度.
在哺乳期中期,低MUN奶牛的牛奶固体和脂肪含量显著增加.
在MUN表型,试验MUN和UN度之间观察到正相关性.

结论:

在商业牛群中的A1PF奶牛可以进行表型化和选择以低MUN度.
这种选择策略显示了减少环境N损失和改善乳制品系统健康的潜力.
遗传追踪和选择性育种可以进一步增强低MUN A1PF的群体.

关键词:

奶牛牛奶牛牛牛牛牛牛牛牛牛牛牛牛牛牛牛牛牛牛牛牛牛牛牛牛牛牛牛牛奶尿素的氨基酸.尿中的是什么?尿中的是什么?

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