Worm resistance in a Merino breeding objective - influence of genetic correlations between resistance and production traits.
Worm resistance in a Merino breeding objective - influence of genetic correlations between resistance and production traits.
复制标题
美利奴羊毛育种目标中的蠕虫抗性——抗性和生产性状之间遗传相关性的影响。
DOI：
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发表时间：
1998
期刊：
影响因子：
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通讯作者：
S. Eady
中科院分区：
文献类型：
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作者：
S. Eady
一个理想的收益的方法被用来调查的效果，把不同的重点放在蠕虫抗性的美利奴育种目标。预测的遗传增益的敏感性进行了检查，使用两套假设的参数和一系列的蠕虫抗性所需的收益。假设生产性状和粪卵数（FEC）之间的遗传相关性为零，在人口中，最好的估计是真实的参数，结果是低估了生产的反应，并大大改变了生殖率的生产指数的贡献。FEC中的遗传变化被过度估计，特别是当针对FEC指定的期望增益较低时。
A desired gains approach was used to investigate the effect of placing varying emphasis on worm resistance in a Merino breeding objective. The sensitivity of predicted genetic gain was examined using two sets of assumed parameters and a range of desired gains for worm resistance. The outcome of assuming zero genetic correlations between production traits and faecal egg count (FEC), in a population where the best available estimates are the true parameters, was to under-estimate response in production and to change substantially the contribution of reproductive rate to the production index. Genetic change in FEC was over estimated, particularly when the desired gain specified for FEC was low.