估计的基因参数增长特征在dorper杂交的绵羊种群的遗传参数
Shanbel Besufkad1, Shenkute Goshme2, Aschalew Abebe2
1Debre Birhan Agricultural Research Center, Debre Birhan, Ethiopia. shanbel21@gmail.com.
Tropical animal health and production
|September 20, 2024
概括
多珀杂交羊的表型生长特征呈现下降趋势,而遗传趋势则有所变化. 建议选择断奶体重和平均每日收益,以提高这些羊的生长性能.
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:
- 多珀杂交羊对肉类生产很重要.
- 了解遗传和表型参数对于有效的育种计划至关重要.
- 增长特征显著影响绵羊的生产力和经济价值.
研究的目的:
- 估计多珀杂交羊的关键生长特征的遗传和表型参数.
- 分析十年来增长表现的趋势.
- 为提高绵羊生长的选择策略提供见解.
主要方法:
- 利用了来自1347只多珀杂交羊 (2012-2022) 的5717个成长记录.
- 使用平均信息限制最大概率 (AI-REML) 程序应用了六种单变体动物模型.
- 估计的直接遗传性和遗传相关性,包括出生体重,断奶体重和平均每日收益等特征.
主要成果:
- 所有研究的生长特征的表型表现呈现下降趋势.
- 直接遗传率估计有所不同,对断奶体重 (0.29),六个月体重 (0.37) 和断奶前平均每日收益 (0.43) 观察到适度的遗传率.
- 遗传相关性表明,选择断奶体重 (WT3) 可能会因为相关反应而对其他生长特征产生积极影响.
结论:
- 尽管表型趋势下降,但关键生长特征的适度遗传性表明了基因改进的潜力.
- 专注于断奶体重和平均每日收益的选择可能会在多珀杂交羊中产生积极的反应.
- 这些发现支持明智的育种决定,以提高埃塞俄比亚多珀杂交羊群的生长性能.
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