Possible genetic antagonism between production traits and fertility rate leads to economic losses due to low fertility rates with increasing production yields. Thus, reproduction rates are of considerable importance. The economic impact of fertility problems has been investigated by several authors (Philipsson,1980; Shanks, 1979). An increased conception rate of IK would reduce the annual cost of breeding and reproduction by about 5 mill. Sw.Kr. (Philipsson,1980) . Therefore, fertility traits should be introduced in cattle breeding programs. In the Bavarian Simmental population an investigation was carried out with the aim of estimating population parameters and of predicting breeding values of sires using the BLUP method.
Proceedings of the World Congress on Genetics Applied to Livestock Production, Volume 7. Symposia (1), , 580–585, 1982
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