Since 1996, Interbull (http://www.interbull.org) has been routinely calculating international breeding values of dairy bulls from their national proofs. With the steady increase in international exchanges of breeding material, these international evaluations have become a decisive tool in selection schemes. In November 2001, 25 countries were subscribing to the service. The current Interbull procedure includes the de-regression of national estimated breeding values (EBVs) followed by the analysis of these deregressed proofs to estimate genetic correlation between countries and to evaluate each bull in each participating country, using a MACE (Multitrait Across Country Evaluation - Schaeffer, 1994) approach. 

I. Delaunay, Vincent Ducrocq, Didier Boichard

Proceedings of the World Congress on Genetics Applied to Livestock Production, Volume 2002. Session 1, , 1.14, 2002
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