p.g.t. Ust'-Kinel'skiy, Samara, Russian Federation
Samara, Russian Federation
The purpose of the study – improvement of breeding and productive qualities of Hereford cattle by insemination bulls form the canadian selection. It is established that in young Hereford beef cattle between live weight and height at the sacrum and between the height at the sacrum and average daily gains there are mainly medium and high positive correlation (from 0.35 to 0.73) . Regression analysis has shown that the change in height in the sacrum on 1 cm, causes the increase of live weight of animals from 1.55 kg in animals of different lines and produktivity gain of calves from 7.67 g to amounted to 23.87g. The highest coefficient of the time average correlation coefficient of between the height at sacrum and live weight setlen in the group of heifers, obtained a bull from the absolute 49S, and the highest co-factor regression between these two traits in heifers obtained from a bull of a Wide Load 391W. The same trend holds when comparing groups correlation coefficient and regression between the height at the sacrum and average daily gain. It is noted that calves of all groups are well adapted to local conditions, and have high gain.
cattle, measurements, weight, gain, correlation, regression
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