The evaluation included conformation traits of 793 calf-bulls with various HF genes proportion born in 1995-1996. The bulls were assigned into 4 groups of animals according to the proportion of HF cattle genes. Growing share of the HF cattle genes in the genotypes of the evaluated bulls significantly influenced an improvement of their conformation traits, which are directly related to dairy performance, i.e. height at rump, general appearance, caliber, and type. .Statistically confirmed correlations occurred between HF cattle genes proportion, and a majority of conformation traits. The highest positive relationship was found for high at rump and milk character (among the linear traits), as well as for type, and caliber, (general merit). The remaining traits were mainly negatively correlated.

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