Mazur O. Estimation of Genotypes of Common Beans (Phaseolus Vulgaris L.) by Economic and Biological Characteristics in the Conditions of the Forest-Steppe of the Right Bank

The thesis deals with the study of the breeding value of the common bean variety samples by the variability of economic and biological characteristics, in particular, grain productivity and adaptability. The research on the topic of the thesis included the study of the common bean breeding material by the duration of the vegetation and interphase periods, elements of the yield structure, grain productivity, resistance to diseases, technological capacity, drought tolerance in terms of quantitative value and variability. As a result of the research, correlations between grain productivity and hydrothermal conditions, elements of the yield structure and infestation with diseases have been established. There have been identified variety samples characterized by a long period of "flowering-maturation" that are the least responsive to the changing environmental conditions as well as the least responsive to deterioration of conditions of the hydrothermal regime by the reduction of the mass of 1,000 grains and that belong to drought-resistant. Variety samples that combine high genotype potential and stable yields are better under availability of a complex of adverse conditions as well as a positive response to better conditions of cultivation. Variety samples that are resistant to fusariosis, bacteriosis, bacterial wilting, viral and yellow viral mosaics and characterized by low variability of resistance from the influence of environmental conditions have been identified. Variety samples have been differentiated by the level of environmental potential in accordance with their response to the growing conditions in the research area. Evaluation and distribution by size of plasticity and stability have allowed us to identify ecologically adapted genotypes by the yield, duration of the growing and interphase periods, resistance to diseases. There have been identified combinations with hybrids F2 that have achieved positive transgressions by the elements of the yield structure, duration of the interphase period of "flowering-maturation"