Linear type traits that characterize body development as the predictors of lifetime of Ukrainian Black-and-White dairy and Holstein cows

The researches were conducted in the aspect of studying problem dairy cows lifetime depending on linear traits assessment conformation type. By classification method estimated firstborn Ukrainian Black-and-White (UBWD) and Holstein (H) breeds. Descriptive that characterize overall body structure studied: chest width, depth, angularity, condition, rear width position. According to research results, relative variability descriptive type with cow's was determined. curvilinear. Cows for 4–7 score had a higher lifespan 2704–2844 2688–2789 days. highest animals an depth development 6-9 unreliable predominance breed cows, grades both breeds 2824 2802 days 9 score. Animals optimal angularity estimation 5 differed, lived longest – 2842 2828 days, while increasing decreasing this trait, number declined. rump assessment, 2766 2832 (H). UBWD part used 592 (P <0.001), 708 <0.001) longer compared 1 maximum average condition 2774 below herd much than one. degree relationship between these depended specific part. Key words: breed, Holstein, traits, lifetime.