Should genetic groups be fitted in BLUP evaluation? Practical answer for the French AI beef sire evaluation.

Abstract excerpt

Some analytical and simulated criteria were used to determine whether a priori genetic differences among groups, which are not accounted for by the relationship matrix, ought to be fitted in models for genetic evaluation, depending on the data structure and the accuracy of the evaluation. These criteria were the mean square error of some extreme contrasts between animals, the true genetic superiority of animals...

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