Loboda V. Estimation to efficiency of plant-breeding improvement of herd of the Ukrainian red-and-white dairy breed

In dissertation work description of intensity of development of repair heifers is resulted and reliable dependence of signs of the milk productivity is set on the genealogical formings and bulls-sires. It is set that over the increase of duration of service period brings to the insignificant and unreliable increase of yield of milk of cows for 305 days of lactation and reliable for complete, but to diminishing of him for all of life. Existence of reliable connection is set between intensity of growing of sapling and future milk productivity of cows in age the first lactation. The estimation of crossbreeding cows of different genotypes witnessed on the indexes of duration of the use and lifelong productivity, that they tested appropriate influence of conditional stake of heredity of Holstein breed. The analysis of inherited line selection rotined a reliable hereditation lines on the indexes of the lifelong productivity of cows, and an interlinear selection in the different variants of combinations of paternal and maternal lines rotined substantial changeability of posterity, got from these variants, on the estimated signs. The degree of changeability and heredity of body measurements of reasons which characterize the build of cows and their connection with the suckling productivity is certain. At the use of method of linear classification which answers the requirements of ICAR, the level of inhered and intergregarious changeability is set on the group and descriptive signs of exterior with determination of population-geneticals parameters of linear signs of first-calf cows on the modern stage of selection. On the method of linear classification bulls-sires are appraised on the exterior type of their daughters with the construction of the graphs of exterior type with determination of double plus of type.