Holstein lines in the selection of black-and-white dairy cattle

The Holstein breed is one of the most widespread breeds in the world. This is due to its productive and adaptive qualities. However, in our country, for a long time, scientists and practitioners were ambivalent about the Holstein. This was due to the problems that arose when crossing Holsteins with local breeds. At present, in Russia, preference is given to the Holstein breed for intensive selection on milk production. The purpose of this publication was to study the productive characteristics of livestock of different lines. The productivity of the animal lines of V.B. Ideal, M. Chieftain, R. Sovereign (n = 522). It was determined that by 18 months, live weight indicators reached 427.9-434.4 kg. Age at first insemination was 15.7-17.0 months. Live weight at the first insemination was the highest in line M. Chieftain - 410.6 kg. Indicators of variability in live weight during all periods of rearing were normal. Heifers of R. Sovereign (RS) line were significantly worse than heifers of M. Chieftain (MC) line at 10 and 12 months by 12 and 13.2 kg (p function show_eabstract() { $('#eabstract1').hide(); $('#eabstract2').show(); $('#eabstract_expand').hide(); }