Karateeva E. The effect of the intensity of formation of different breeds of cows in their early postnatal ontogenesis on their productivity

The object of research: the relationship of growth and development of heifers of different breeds of cows in the future productivity, biological and genetic parameters of dairy cattle in their forecasting and implementation in breeding. The aim of research: to substantiate the expediency of the selection and use of females of different species taking into account of their genetic peculiarities of growth and development in early postnatal ontogenese (development). Methods of research: molecular genetic (PGR) analysis, histologic (microscopic analysis of the skin), biometric (variational-statistical, dispersion, correlation, entropy and informational analysis, mathematical modelling), adopted in animal science and economic research methods. Theoretical and practical results: in the theoretical level expanded and deepened knowledge about the degree of differentiation of organs and systems of the body during early postnatal development and its influence on forming of milk production, influence of the intensity of the formation of the body of cows the histological structure of the skin and polymorphism of individual structural genes and their possible link with the productivity of cows. In practice - method of predicting the future productivity of cows on the basis of growth and development of their heifers in early postnatal ontogenes was worked out. The use of animals with increased intensity of formation of the body increases profitability of milk production. Novelty: it was determined for the first time that heifers of their milk productivity trend with the fastest type of intensity of forming organism reliably cows dominate age analogues of slow type; the large sickness of the skin and the components of the skin as well as lower density of hair follicles in animal of red and red-chequered coat ay serve as a marker of rapid type of intensity of forming of body and higher yields; the entropy of milk production in most age periods of females regardless of the breed is characterized by a high level of organization of biological systems in represantatives of rapid type of intensity of forming of body, indicating for their better organization and determinism. It was determined the subsequent development of statement that peculiarities of changing of live weight of heifers in age period from birth to six months of age, even taking into account the type of intensity of forming organisms provide the opportunity of forming the best possible forecasts of milk production of cows. It was founded that on thensame qualitative and quantative traits in milk production polymorphism of individual structural genes has different effect and provides a specific concentration of alleles and genotypes In breeds of dairy cattle of different types of intensity of forming of the body. The degree of implementattion: the materials of dissertation research Incorporated In the GP PR "Steppe" and PSKHP "Kozyrskoye" Mykolaiv region. Application areas: livestock, particularly cattle.