估计羊品种生长特征和克莱伯比的遗传参数和克莱伯比
Shanbel Besufkad1, Shenkute Goshme1, Asfaw Bisrat1
1Debre Birhan Agricultural Research Center, Debre Birhan, Ethiopia.
Heliyon
|February 5, 2024
概括
这项关于埃塞俄比亚多珀羊的研究发现,尽管存在一些积极的遗传收益,但表型生长趋势仍在下降. 低遗传性表明直接选择生长可能具有挑战性.
科学领域:
- 动物遗传学和动物繁殖
- 量化遗传学 量化遗传学
- 畜牧业生产 畜牧业生产
背景情况:
- 多珀羊在埃塞俄比亚是一个重要的品种,对肉类生产至关重要.
- 了解遗传和表型参数对于提高牲畜生产率至关重要.
- 增长特征和克莱伯比率是羊表现的关键指标.
研究的目的:
- 估计多珀羊的生长特征和克莱伯比率的遗传和表型参数.
- 在12年的时间内评估遗传和表型趋势.
- 确定适当的动物模型来估计这些参数.
主要方法:
- 从Debre Birhan农业研究中心收集了12年 (2012-2023) 的数据.
- 使用各种动物模型的平均信息限制最大概率 (AI-REML) 估计 (共同) 差异组件.
- 使用概率测试来确定每个特征最适合的模型.
主要成果:
- 对于几个生长特征 (WT3,WT6,WT12,ADG0-3,ADG3-6) 的表型表现显示出下降趋势.
- 对WT3,WT6,WT12和ADG0-3.0进行了积极的遗传改善趋势.
- 直接遗传率估计一般很低,这表明通过选择直接基因改进的潜力有限.
结论:
- 研究的特征的低直接遗传性表明,通过直接选择进行遗传改进可能是困难的.
- 现型性表现下降的趋势需要进一步调查.
- 出生的年份显著影响了所有研究的特征,突出了其在管理和分析中的重要性.
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