Records of milk performance and conformation scores of 7814 primiparous cows, born in 1993–1996 were analyzed in order to estimate genetic and phenotypic correlations between 3 traits of milk production (milk yield, protein yield, fat yield) and 11 traits of conformation. The cows of Black andWhite (n = 2240) and Red andWhite (n = 4574) breeds were kept in 139 herds in the region of Śląsk Opolski. The analyses were done using DFREML and SAS computer packages and a linear model with an additive effect of animal. The estimated annual genetic trends for milk yield, fat yield and protein yield were 23.9 kg, 0.38 kg and 1.37 kg respectively. The highest genetic correlations (within breeds and regardless of breeds) were found between milk yield and: capacity, type and conformation and total score. Somewhat lower correlations were estimated between milk yield and: height at sacrum, chest circumference and udder. The lowest correlations were found between milk yield traits and linear traits of udder.

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