Yemets Z. Developing models of selection evaluation of fat content and fat yield of cows

Object of researches - cows of milk direction of productivity. The purpose of researches is Development of models of prognostication of maintenance of fat in milk and output of milk fat for the use of them in a practical selection. The methods of researches are zootechnics, statistical, analytical, biometrics, mathematical. Results of researches: 1. For a theory - features and parameters of influencing of complex of basic genetic are First definite and paratipical factors on maintenance and output of milk fat of cows. Selection efficiency of selection of cattle with the use of the developed models of prognostication of maintenance and output of milk fat is set. 2. For practice - Methods and models of estimation of maintenance and output of milk fat can be used in practice for prognostication of the indicated productive signs, planning of selection process, conducting of effective selection. Sphere of the use - cattle breeding enterprises of Ukraine.