现型皮下背部脂肪厚度与年轻牛肉公牛的精子图结果之间的关系
Molly S Smith1, Jorge Octavio Solano Aguilar1, Grace Nyhuis1
1University of Georgia, Department of Animal and Dairy Sciences, Athens, GA 30602, USA.
Translational animal science
|April 29, 2025
概括
牛肉公牛的皮下背部脂肪厚度 (SCBF) 较高与更多的精子形态异常以及在繁殖健康检查 (BSE) 期间延期的可能性更高有关. 这表明SCBF会影响生育能力,即使饮食一致.
科学领域:
- 动物科学动物科学
- 生殖生物学 生殖生物学
- 牛肉牛生产 牛肉牛生产
背景情况:
- 皮下背脂厚度 (SCBF) 是牛肉公牛能量储量的关键指标.
- 高SCBF对公牛的精液质量和生育结果的影响需要进一步研究.
- 了解这些关系对于优化育种健全性评估和群体生产力至关重要.
研究的目的:
- 调查皮下背部脂肪厚度 (SCBF) 与年轻牛肉牛的精液质量之间的关联.
- 为了确定在统一的饮食条件下增加的SCBF是否会对精液参数和生育能力评估产生负面影响.
- 根据SCBF类别评估被归类为延期的公牛的比例.
主要方法:
- 一项回顾性队列研究分析了两项发展计划中710只年龄的牛肉公牛的数据.
- 牛被分为基于SCBF的队列 (例如,顶部10%,中间80%,底部10%).
- 进行精液质量和繁殖健全性检查 (BSE),用尸体超声波评估SCBF,眼区域 (REA) 和肌内脂肪 (IMF).
主要成果:
- 与同行相比,具有较高SCBF (TOP10,TOP20) 的公牛体重,SCBF,REA和IMF都较大.
- SCBF水平没有显著影响平均每日增长,阴囊周长或精子运动.
- 在高SCBF的公牛中观察到形态正常精子的百分比下降,导致BSE的延期率更高.
结论:
- 牛肉公牛的SCBF升高,即使有一致的饮食,也与精子形态异常的增加有关.
- 较高的SCBF会对生育潜力产生负面影响,这一点可以从较大比例的公牛被推迟的结果中得到证实.
- SCBF是牛肉公牛的繁殖健全性评估中需要考虑的重要因素.
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