Multiple trait international bull comparisons
Multiple trait international bull comparisons
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DOI：
10.1016/s0301-6226(00)00255-4
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发表时间：
2001-05-01
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影响因子：
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通讯作者：
Schaeffer, LR
中科院分区：
文献类型：
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作者：
Schaeffer, LR
多重特质，多重国家。描述了国际上对奶牛或肉牛的评价模型。这样的模型是必要的，这样国家就不必从国内多性状模型中估计出几个子性状的育种值，而将这些值合并到一个单一性状中。在综合来自不同国家的多性状模型的信息之前，需要进行多性状反回归步骤。提出了一种近似贝叶斯方法来估计各国性状之间的遗传协方差，同时保持每个国家的遗传和残差协方差矩阵不变。通过一个小例子说明了这些方法。(C) 2001 Elsevier Science B.V.版权所有
A multiple trait, multiple country. international evaluation model is described for dairy or beef cattle. Such a model is necessary so that countries with estimated breeding values for several subtraits from a within-country multiple trait model do not have to combine those values into one single trait. A multiple trait de-regression step is necessary before combining information from different countries coming from multiple trait models. An approximate Bayesian method is suggested for estimating the genetic covariances between traits between countries, while holding the genetic and residual covariance matrices for each country constant. The methods are illustrated by a small example. (C) 2001 Elsevier Science B.V. All rights reserved.