Significance of breeding value indicators for prediction of milk yield

A comparative assessment of the significance various indicators breeding value bulls for predicting milk yield in highly productive herd farm economy "Alfa" was carried out. The cows, whose bulls-fathers were evaluated Ukraine and abroad, studied. It established that period from 2009 to 2014, first-calf heifers increased by 23.9 % reached 5894.3 kg. Accordingly, during specified period, most quantitative productivity bulls' daughters also increased: parent terms +245.3 kg +540.4 2014; total amount fat per lactation +10.2 +29.7 correlation analysis relationships between their actual FE (correlation coefficients r higher than 0.8) significantly (p<0.001) depended on average bull's herds where these evaluated. sire characterized high (r=0.675) significant (p<0.01) relationship with (daughters sires). variance influence estimation method breeder (BV, ETA, ZW, DRV, RPC) first this (p=0.001), power η2=0,59. Significant differences mostly observed yields abroad Ukraine. biggest difference revealed ETA (Canada) "daughter-of-the-same-age (DRV)" (Ukraine). This 2640 favor firstcalf Canadian bulls. Key words: bulls, value, productivity, yield, selection index, evaluation method.