估计Hardhenu牛的生殖和生产特征上的母性和添加效应
Devesh Kumar Yadav1, Zile S Malik2, Ankit Magotra2
1Department of Animal Genetics and Breeding, College of Veterinary and Animal Sciences, Sardar Vallabh Bhai Patel University of Agriculture and Technology, Meerut, India.
这项研究分析了Hardhenu牛的表现特征,发现分娩期显著影响牛奶产量和哺乳期长度. 观察到附加性遗传变异性,遗传性估计为繁殖改进提供了洞察力.
科学领域:
- 动物遗传学动物遗传学
- 乳制品科学 乳制品科学
- 畜牧养殖 畜牧养殖 畜牧养殖
背景情况:
- 了解遗传参数对于改善乳牛表现至关重要.
- 哈德赫努牛是一种有价值的土著品种,需要进行特定的遗传评估.
- 以前的研究可能没有完全阐明这种品种生产和繁殖特征的遗传结构.
研究的目的:
- 估计Hardhenu牛的生产和繁殖特征的变异成分和遗传参数.
- 评估环境因素的影响,特别是分娩期对关键绩效指标的影响.
- 为了确定重要的特征的遗传性,为明智的育种策略.
主要方法:
- 分析了445头Hardhenu牛 (59头公牛,227头母牛) 的性能数据.
- 最小方形分析,以确定分娩期对生产特征的影响.
- 估计 (共) 差组件和直接遗传 (h2) 的估计.
主要成果:
- 产牛期 (POC) 显著影响了第一次哺乳期牛奶产量 (FLMY),300天的牛奶产量 (FLMY300),第一次峰值产量 (FPY) 和总哺乳期牛奶产量 (TLMY) (p < .01).
- 最小正方形表示FLMY (2665.68±45.66公斤),FLMY300 (2425.52±34.41公斤),FLL (312.95±3.83天),FPY (11.52±0.15公斤) 和TLMY (9282.44±167.03公斤) 报告的平均值.
- 仅检测到附加的遗传变异性;没有观察到显著的母体影响. 直接遗传率估计 (h2) 从0.03到0.41不等.
结论:
- 产卵期是一个重要的环境因素,影响了Hardhenu牛的牛奶生产.
- 附加遗传因素是表现特征的主要驱动因素,这表明通过选择有可能获得遗传收益.
- 遗传性估计为开发有效的育种计划提供了基础,以提高哈德赫努牛的生产力.
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