Opalko O. Regenerative ability of cultivars, hybrid seedlings, clonal rootstocks and decorativ forms of apple-trees in view of their economic properties

Object of research - regularities of the manifestation of regenerative ability of over 40 genotypes of Malus Mill. Purpose of research - working out the methodology of assessment of regenerative potential of apple-trees, improving the technology of own-root propagation of apple trees with stem cuttings. Methods of Research - field, laboratory-field, laboratory, statistical. Theoretical and practical results - methods of assessment of regenerative potential of apple trees were suggested, accelerated indirect methods of predicting regenerative ability of apple trees were improved, technologies of preparation of matrix materials for increasing the rooting percentage of stem cuttings were improved, comparative assessment of productivity and economic efficiency of growing cultivars and hybrid seedlings of apple-trees, created in Symyrenko Mliyiv Institute of Horticulture of the Academy of Agricultural Sciences of Ukraine and decorative value of ornamental apple-tree forms studied was done. Novelty - new methods of assessment and a formula of calculation of regenerative index of organs of generative sphere of flowers were worked out, the methods of assessment and a formula of calculation of post-traumatic regenerative ability of vegetative apple tree organs were improved, the advantages of NAA-like preparation Pomonit P-10 to stimulate regenerative processes of apple tree cuttings were identified. Degree of introduction - the methods of assessment of regenerative ability of vegetative organs and generative sphere of apple tree flowers, the application of preparation Pomonit R-10 to stimulate regenerative processes of apple-tree cuttings, the technologies of sterilization of explants of agricultural crops and modified compound of culture medium. Sphere of use - research institutions specializing in horticulture, biotechnological laboratories of plants at research and educational institutions.