估计 (Co) 变异组件和基因参数,用于Daglıç绵羊的断奶前和断奶后生长特征
Serdar Koçak1, Samet Çinkaya1, Mustafa Tekerli1
1Department of Animal Science, Faculty of Veterinary Medicine, Afyon Kocatepe University, Afyonkarahisar 03200, Türkiye.
Animals : an open access journal from MDPI
|January 11, 2024
概括
这项研究估计了Dağlıç绵羊生长特征的遗传参数,发现了对断奶前和断奶后体重的显著直接遗传性. 这些发现支持选择性育种,以提高本土羊品种的生长性能.
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:
- 了解对生长的遗传和环境影响对于改善畜牧业至关重要.
- 达格里奇羊是一种本地品种,需要特定的遗传参数估计才能实现有效的繁殖计划.
研究的目的:
- 估计Daglıç绵羊中断奶前和断奶后生长特征的变异组件和遗传参数.
- 确定最合适的统计模型,考虑直接添加基因,母性基因和母性永久环境影响.
- 提供数据,通过对达格里奇绵羊进行选择来增强生长特征.
主要方法:
- 利用了2011年至2021年间出生的21735只达格里奇羔羊的数据.
- 使用平均信息限制最大概率 (AI-REML) 算法来估计 (协同) 差异组件.
- 将不同的统计模型进行比较,以确定最适合各种增长特征的模型.
主要成果:
- 模型3对出生体重 (BW),平均每日增量 (ADG) 和断奶体重 (WW) 是最佳的.
- 模型4最好描述3个 (W3),6个 (W6) 和12个月 (W12) 的体重.
- 直接遗传率在0.22 ± 0.02 (WW) 到0.47 ± 0.05 (W6,W12) 之间;遗传和表型相关性很高.
结论:
- 直接的附加遗传效应显著影响达格里奇绵羊的生长特征.
- 估计的遗传参数为实施有效的选择策略提供了基础.
- 基于这些参数的选择性育种可以导致生长表现的大量遗传收益.
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