风险因子分析和遗传参数估计对布尔人,西班牙人和杂交的山羊小孩的断奶前死亡特征
Liuhong Chen1, William Foxworth1, Scott Horner1
1International Goat Research Center, College of Agriculture, Food and Natural Resources, Prairie View A&M University, Prairie View, TX 77446, USA.
Animals : an open access journal from MDPI
|April 13, 2024
概括
羊的断奶后死亡率 (PWM) 受环境和遗传因素的影响. 管理,遗传选择和杂交可以有效地减少PWM,改善整体群体的健康和生产力.
科学领域:
- 动物科学动物科学
- 遗传学 是一个遗传学.
- 生殖生物学 生殖生物学
背景情况:
- 断奶后死亡率 (PWM) 对山羊生产系统产生重大影响.
- 识别风险因素和理解对PWM的遗传贡献对于提高群体生存率至关重要.
研究的目的:
- 评估与山羊的断奶后死亡率 (PWM) 相关的固定风险因素.
- 估计布尔山羊和西班牙山羊混合种群中PWM特征的遗传参数.
主要方法:
- 利用布尔山羊和西班牙山羊 (纯种和杂种) 的927个出生记录.
- 使用后勤回归模型来评估PWM特征的风险因素 (D0-3,D4-60,D61-90,D0-90).
- 应用贝叶斯值模型和吉布斯采样来估计遗传参数.
主要成果:
- 出生体重,季节, litter 尺寸,性别,水年龄,品种和异质化是PWM的重要风险因素.
- 对于D0-3,D4-60,D61-90和D0-90的遗传概率估计分别为0.263,0.124,0.080和0.207.
- 在不同PWM特征之间观察到高度的遗传相关性.
结论:
- 羊的断奶后死亡率是一个复杂的特征,受到环境和遗传因素的影响.
- 基因选择和杂交策略,以及改进的管理实践,可以有效地减少PWM.
- 这些发现为旨在提高山羊生存率的基因改进计划提供了基础.
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