Abstract
Restricted best linear unbiased prediction (restricted BLUP) is derived by imposing restrictions directly within a multiple trait mixed model. As a result, the restricted BLUP procedure requires the solution of high-order simultaneous equations. In the present paper, a simple method for computing BLUP of breeding values with the change in some traits restricted to zero is presented. The technique is valuable, particularly when a large number of restrictions are imposed. In this case, the values of economic weights for restricted BLUP of breeding values of traits do not affect the total genetic merit.
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