Object of study – patterns of formation, inheritance and variability of valuable economic attributes in baselines, newly created lines, corn testcrosses by yield, resistance to bio- and abiotic factors, modeling and creation of source material and hybrids of corn grain use and features of their selection. Aim is to theoretically substantiate the basics of the selection process of maize, to determine and forecast the selection effect based on the variability of quantitative traits, patterns of their inheritance, to establish the level and patterns of yield characteristics of newly formed lines of different genetic plasmas and to create intensive hybrids of different FAO groups for the conditions of irrigation. Methods - general science: analysis and synthesis, the method of reductionism, generalization and systematization. Special: inbreeding-hybridization concept, individual selection, cumulative selection, methods of backcross, testcross in the creation and evaluation of parent components and hybrids of corn. Field (varietal study to determine the influence of growing conditions on the object of study), selection (hybridization to obtain experimental lines and hybrids). Results - regularities of manifestation and variability of traits in the lines - parental components and hybrids of maize with the use of different genetic plasmas during irrigation were established. Under the conditions of irrigation, a new source material was created - parental components of different FAO groups on the basis of different genetic plasmas for selection of intensive maize hybrids. The productivity of lines - parental components of maize hybrids depending on watering methods, plant density and action of growth-regulating drugs is established; parameters of variability of economically valuable traits of maize hybrids of different maturity groups under irrigation conditions; theoretically substantiated morpho-physiological and heterosis models of maize hybrids by maturity groups of FAO 150-600 under irrigation conditions with high economic and valuable characteristics; the optimal parameters of the model of maize hybrids of different FAO groups for irrigation conditions in the south of Ukraine were developed. The principle of selection of self-pollinated lines (parental components) of different classical genetic plasmas and Mixed plasma lines is offered. Based on the established selection and genetic regularities of the level of manifestation and variability of traits - parental components and hybrids of corn in the grain direction, the efficiency of evaluation and selection of source material for selection and creation of intensive hybrids adapted to irrigation conditions is ensured. As a result of realization of the basic scientific provisions of the dissertation are created: 19 lines - parent components and 8 innovative hybrids which are brought in the State Register of plant varieties given for distribution in Ukraine. Novelty - the basics of selection of common corn by complex use of selection research methods are theoretically substantiated.For the first time in Ukraine the regularities of manifestation and variability of traits in lines - parental components and hybrids of maize with the use of different genetic plasmas during irrigation have been established. Under the conditions of irrigation, a new source material was created - parental components of different FAO groups on the basis of different genetic plasmas for selection of intensive maize hybrids. For the first time for irrigation conditions it was established: productivity of lines - parental components of maize hybrids depending on watering methods, plant density and action of growth-regulating drugs; parameters of variability of economically valuable traits of maize hybrids of different maturity groups in the conditions of drip irrigation and sprinkling; optimal parameters of morpho-physiological models of maize hybrids by maturity groups (FAO 150-600) for irrigation conditions in the south of Ukraine were developed. The scientific value - established theoretical and practical results of scientific research provided an opportunity to create 19 lines parental - components and 8 innovative hybrids, which are included in the State Register of plant varieties suitable for distribution in Ukraine: Stepovyi (FAO 190), Chornomor (FAO 250), Oleshkivs`kyi (FAO 280), Tronka (FAO 380), Tavrychanka (FAO 380), Lamasan (FAO 420), Hileia (FAO 430), Vira (FAO 420). On the basis of the established selection and genetic regularities of the level of manifestation and variability of traits of lines - parental components and hybrids of corn of the usual grain direction the efficiency of estimation and allocation of initial material for selection and creation of intensive hybrids adapted to irrigation conditions is provided. A collection of self-pollinated lines used in the creation of intensive type hybrids for irrigation conditions has been created. Sector – agriculture.
