线性混合模型的比较,用于在循环测试设施中养的母的遗传羽毛评分分析
1Animal Breeding and Genomics Centre, Wageningen University, 6709PG Wageningen, the Netherlands.
Poultry science
|January 29, 2025
概括
最简单的单变体子级繁殖模型最适合分析产母的羽毛分数,提供准确的繁殖值而不会过度分散. 这个模型有助于选择防止羽毛和相关的死亡率.
科学领域:
- 动物遗传学动物遗传学
- 禽畜科学 禽畜科学 禽畜科学
- 动物福利 动物福利
背景情况:
- 羽毛和相关的损害是产母的重大福利和经济问题.
- 兄弟群体中羽毛分数的遗传分析捕捉了伤害和受伤的特征.
- 目前用于估计羽毛分数的繁殖值的模型缺乏广泛的公共验证,与生存的遗传相关性可能会导致偏差.
研究的目的:
- 为了比较和验证六种不同的遗传模型来分析产母的羽毛分数.
- 根据准确性,估计的繁殖值的分散性和遗传变异性来评估模型.
- 通过使用反复测试数据来确定羽毛得分分析的最佳模型.
主要方法:
- 对比单变体和双变体模型 (羽毛得分与生存率).
- 使用个人或子级记录测试了 sire 和动物模型.
- 基于准确性,分散性和遗传差异估计的评估模型性能.
主要成果:
- 个人级别的单变动物模型在准确性和分散性方面表现不佳.
- 在动物和 sire 模型,或单变体和双变体模型之间没有发现显著的准确性差异.
- 子级记录减少了过度分散;单变的子级 sire 模型显示没有显著的过度分散.
结论:
- 单变的子级生长模型是最适合用于母的羽毛分数分析的.
- 这种模型是简单的,准确的,避免过度分散,促进对羽毛的选择.
- 它提供可靠的育种价值,以提高的福利和效率.
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