在Murciano-Granadina乳山羊的繁殖特征遗传参数的估计
Jamshid Ehsaninia1, Mohammad Bagher Zandi2, Moein Taned2
1Department of Agriculture, Minab Higher Education Center, University of Hormozgan, Bandar Abbas, Iran.
概括
伊朗的Murciano-Granadina山羊的繁殖特征显示出低至中度的遗传性,表明通过选择有可能进行遗传改进. 这些发现对于优化乳山羊的育种计划至关重要.
科学领域:
- 动物遗传学动物遗传学
- 生殖生物学 生殖生物学
- 量化遗传学 量化遗传学
背景情况:
- 穆尔西亚诺-格拉纳迪纳山羊是伊朗的关键乳品种.
- 了解生殖特征对于高效的乳山羊养殖至关重要.
- 这些特征在伊朗条件下的遗传参数以前是未确定的.
研究的目的:
- 估计伊朗Murciano-Granadina山羊的生殖特征的变异和共变成分.
- 确定遗传参数,包括遗传性和可重复性.
- 分析关键生殖特征的遗传趋势.
主要方法:
- 在6年 (2016-2021) 中从7573只动物收集的数据.
- 分析特征:第一次服务时的年龄 (AFS),第一次开玩笑时的年龄 (AFK),开玩笑间隔 (KI),孕期长度 (GL),服务期 (SP) 和干期 (DP).
- 用单变量动物模型 (GIBBS1F90) 来进行参数估计的贝叶斯推理.
主要成果:
- 直接遗传概率 (h2a) 的估计范围从低到中等 (SP的0.007±0.001到GL的0.23±0.03).
- 对于GL (0.45±0.06) 和DP (0.19±0.04),重复性中度,但对于SP (0.04±0.01) 低.
- 遗传和表型趋势显示所有特征的最小,不显著的波动.
结论:
- 这种种群体的生殖特征表现出低至中度的遗传性.
- 通过选择存在足够的附加遗传变异,以实现潜在的遗传改进.
- 环境和管理因素显著影响诸如服役年限等特征.
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