Attention of most researchers dealing with lifetime performance and lifetime has been focussed on the udder, feet and legs as type traits in dairy cows. It seems that, in investigations the role of lifetime and lifetime performance has remained in the background in their relation to body types created by body measurements. The determination of optimum body size from the point of view of efficient milk production and lifetime performance, however, might be an important task as Dohy (1999) stated. Consequently further research is needed in the matter, he emphasised. That is why in dairy cow selection the optimum balance between body size traits and milk production should be found (Gáspárdy et al., 1996 ; Püski et al., 1998 ; 2000 ; 2001) which may result in improvement of efficiency in dairy production. The aim of this study was to find out the effect of different cow types in terms of efficiency of lifetime performance and life span in Holstein-Friesian breed
Proceedings of the World Congress on Genetics Applied to Livestock Production, Volume 2002. Session 1, , 1.92, 2002
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