对养场牛的料和水摄入行为遗传性和差异成分估计
Elizabeth A Dressler1, William Shaffer1, Kelsey Bruno2
1Department of Animal Sciences and Industry, Kansas State University, Manhattan, KS 66506, USA.
Journal of animal science
|November 15, 2023
概括
这项研究表明,牛的料和饮用水的行为是遗传的,对每日食,摄入量和食大小有显著的遗传影响. 这些发现为通过遗传选择提高牛生产效率和可持续性提供了新的途径.
科学领域:
- 动物遗传学动物遗传学
- 营养生理学 营养生理学
- 畜牧生产系统 畜牧生产系统
背景情况:
- 料和水的摄入对于牛生产的利能力,效率和可持续性至关重要.
- 以前的研究在研究相关的动物行为和标准化摄入行为表型方面存在局限性.
- 了解对摄入行为的遗传影响可以优化牲畜管理.
研究的目的:
- 计算和估计牛群五种料和水摄入行为的遗传性.
- 调查摄入行为和总体摄入之间的遗传和表型相关性.
- 识别与料和水摄入行为相关的遗传标记 (SNP).
主要方法:
- 利用830头杂交牛的数据,使用Insentec系统进行精确的料和水摄入量测量.
- 计算了五种摄入行为:每日会话 (DS),摄入率 (IR),会话大小 (SS),每会话的时间 (TS) 和会话间隔 (SI).
- 估计每个特征的变异成分和遗传性,以及表型和遗传相关性. 确定了重要的SNP.
主要成果:
- 料摄入行为的遗传性范围从0.35 ± 0.12 (TS) 到0.63 ± 0.12 (IR).
- 水摄入行为的遗传性范围从0.54 ± 0.12 (TS) 到0.88 ± 0.07 (IR).
- 每日干物摄入量 (DDMI) 和每日水摄入量 (DWI) 的遗传性分别为0.57±0.11和0.44±0.11. 确定了重要的SNP.
结论:
- 牛的料和水摄入行为受到遗传因素的重大影响,并且是遗传的.
- 这些发现为基因评估和操纵牲畜的料和水摄入提供了基础.
- 了解这些遗传性特征可以提高牛生产效率和可持续性.
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