在为澳大利亚美利诺羊设计的多特征选择指数中估计包括弹性的价值
Erin G Smith1, Samuel F Walkom2, Sam A Clark1
1School of Environmental and Rural Science, University of New England, Armidale, New South Wales, Australia.
概括
羊的一般弹性,以羊毛纤维直径变量来衡量,具有适度的经济价值. 将弹性纳入育种指数可以改善动物健康和生产力,但需要仔细平衡生产特征.
科学领域:
- 动物科学动物科学
- 量化遗传学 量化遗传学
- 农业经济学 农业经济学
背景情况:
- 畜牧业的整体弹性有助于适应环境压力,但其在育种方面的经济价值尚未得到充分研究.
- 目前的绵羊养殖专注于羊毛,繁殖和肉类,忽视了弹性经济影响.
- 从纵向数据变异性来估计性,为平衡的育种目标提供了潜力.
研究的目的:
- 通过生物经济模型估计绵羊的一般弹性经济价值.
- 评估弹性对生产特征以及多特征选择指数的贡献.
- 评估遗传相关性和基因组信息对弹性选择反应的影响.
主要方法:
- 为美利诺羊群企业开发了一个生物经济模型.
- 使用羊毛纤维直径方差的自然对数作为弹性指标.
- 包括在繁殖目标中的肉类,繁殖,羊毛质量/数量,健康,死亡率和能量分配的特征.
主要成果:
- 性对指数价值贡献了2.02%,在经济方面排名第11位.
- 模拟选择预测了在10年内0.07个基因标准偏差的弹性改善 (0.08美元/ewe收益).
- 弹性选择反应增加了50%-75%,与更强的遗传相关性或基因组信息.
结论:
- 一般的弹性在绵羊养殖中具有可量化的经济价值,尽管很小.
- 整合弹性需要平衡它的好处与生产特征进展的潜在减少.
- 基因组信息和更强的遗传相关性提高了弹性选择的效率,这证明了对行业指数整合的进一步研究的必要性.
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