RELATION OF MILKING TEMPERAMENT AND MILK YIELD IN HOLSTEIN AND BROWN SWISS COWS

The study comprises 118 cows, of which 69 Holstein-Friesian and 49 Brown Swiss ones. The cows from both breeds are reared by the same technology - free with individual cubicles for rest and milking in milking parlour, herringbone type. To assess the temperament a 5-score system is used: 1 - very nervous and 5 - very calm cows. The average score for milking temperament in the Holstein cows is slightly higher than that of the Brown Swiss ones, 3.74 to 3.65, respectively. The cows with a nervous type of temperament, scores 1 and 2, comprise a relatively high percentage, and they are slightly more in the Holstein - 15.9% than in the Brown Swiss cows - 12.2%. The average milking yield of the nervous and very nervous cows is higher than that of the medium to very calm ones. That difference is greater in the Holstein cows - 744.8 kg compared to the Brown Swiss ones - 445.2 kg. The ranking correlation (Spearman) of the breeding bulls for the dairy trait and the percentage of daughters with scores from 3 to 5 and breeding value for milking temperament score is respectively r(s) = - 0.21 and r(s) = - 0.10.