对Menz羊的生长速度和效率相关特征的遗传评估
Asfaw Bisrat1, Shanbel Besufkad1, Aschalew Abebe1
1Amhara Agricultural Research Institute, Debre Birhan Agricultural Research Center, Debre Birhan, Ethiopia.
PloS one
|December 3, 2025
概括
提高Menz羊的生长效率对于资源有限的环境至关重要. 对于像六个月体重 (WT6) 这样的特征的遗传选择可以提高由于积极的遗传相关性而提高整体育种计划的效率.
科学领域:
- 动物遗传学动物遗传学
- 量化遗传学 量化遗传学
- 羊的繁殖 羊的繁殖
背景情况:
- 增长效率特征对于小反动物至关重要,尤其是在有限的料下.
- 这些特征的遗传改进对于绵羊养殖的经济可行性至关重要.
研究的目的:
- 估计Menz羊的各种生长和效率特征的遗传参数.
- 通过在社区基繁殖计划 (CBBPs) 中进行选择来评估遗传改进的潜力.
主要方法:
- 在CBBP中利用了Menz羊 (2009-2023) 的体重数据.
- 雇佣平均信息限制最大概率 (AI-REML) 使用六种单变动物模型.
- 分析的特征包括六个月体重 (WT6) 和平均每日增长 (ADG1-3),克莱伯比率 (KR1-3),增长效率 (GE1-3) 和相对增长率 (RGR1-3).
主要成果:
- 出生的年份,季节和村庄显著影响了所有研究的特征 (P < 0.001).
- 对大多数特征的直接遗传概率估计为中等至高,表明遗传收益的潜力.
- 在同一生长期内的特征之间观察到强烈的积极遗传和表型相关性.
结论:
- 直接选择为Menz羊的生长和效率特征提供了显著的遗传进步.
- 将效率特征纳入选计划可以提高整体育种计划的有效性,特别是在恶劣的条件下.
- 建议选择六个月的体重 (WT6),因为它与效率特征有积极的相关性.
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