Evaluation of breeding groups by living weight of over-age cows depending on breeding

The assessment of cattle black-and-white, red steppe, Simmental breeds, differentiated by live weight, was carried out. Three groups were formed: selection, production, and marriage. selection parameters are calculated using the standard deviation. animals breeding weight in full-aged cows black-and-white breed 527–472 kg, steppe-595–514, from Novosibirsk region – 555–447, Republic Khakassia 610–475, Hereford 570–462 kg. group black-and white have an average 552.5 steppe 641.1 576.7 648 Region-591.1 analysis interbreed differences shows that Red breeds surpass their peers most measurements. Animals leaders milk yield content index, steppe-in fat fat, bred weight. production allows us to note surpasses its productivity is characterized broadness; elongation; has a greater development high-altitude Evaluation relationship with other productive traits. formation high you create tall stretched array cattle.