Station tests are conducted in order to reduce environmental effects and to estimate breeding values. Optimal use of the results by computing selection .indices requires some knowledge about the variance components involved. But their estimation is very difficult if only little AI is practised and sires are mated mainly within herds. The questions of this investigation, which is not yet finished, are: Which models and which methods of estimation should be used? Is it possible at all to estimate variance components with a minimum accuracy on the basis of the present testing schemes?

H. Haussmann, G. Reiser

Proceedings of the World Congress on Genetics Applied to Livestock Production, Volume 7. Symposia (1), , 261–265, 1982
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