用多种动物模型估计邦加羊的生长,繁殖和生存特征的遗传参数和遗传趋势,使用多种动物模型
Metsafe Mamiru1,2, Aberra Melesse2, Aynalem Haile3
1Animal Research Directorate, Bonga Agricultural Research Center, Bonga, Ethiopia.
PloS one
|February 20, 2025
概括
这项研究评估了邦加羊的繁殖计划,发现生长特征的适度遗传性,表明选择潜力. 生殖和生存特征更多地受到环境的影响,需要改进管理以及选择以提高母羊的生产力和羔羊的生存率.
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:
- 基于社区的育种计划旨在提高绵羊的生产力.
- 提高邦加绵羊的生产力是一个关键目标.
- 评估遗传参数对于有效的育种至关重要.
研究的目的:
- 估计邦加羊的生长,繁殖和生存特征的遗传参数.
- 评估绵羊种群的遗传改进潜力.
- 通知养殖策略,以提高绵羊的生产.
主要方法:
- 使用多变量动物模型来估计共变元件和遗传参数.
- 雇佣平均信息限制最大概率 (AIRML) 和无衍生品的多变量分析.
- 分析了2009-2021年间生长,生殖和生存特征的数据.
主要成果:
- 对生长,生殖和生存特征的附加遗传性估计分别在0.15-0.26,0.06-0.08和0.10-0.17之间.
- 母亲永久环境和动物环境变异影响了生长和生殖特征.
- 在生长,生殖和生存特征之间发现了积极的遗传相关性.
结论:
- 适度的生长特征遗传性表明了通过选择进行遗传改进的潜力.
- 环境因素显著影响生殖和生存特征,需要改进管理.
- 选择奶/六个月体重可以提高母羊的生产力和羔羊的生存率,优化育种计划.
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