Ryabovol Y. Theoretical substantiation of systems of hybridization and the creation of the initial material in breeding of crops. Qualification scientific work on the manuscript

Riabovol I. S. Theoretical substantiation of systems of hybridization and the creation of the initial material in breeding of crops. Qualification scientific work on the manuscript. The qualification scientific work for the degree of Doctor of Agricultural Sciences on specialty 06.01.05 – breeding and seed production (20 Agricultural science and food). – Uman national University of horticulture, Uman, 2020. The dissertation contains a theoretical justification and a new solution to the scientific problem of improving hybridization systems, selecting genetic sources and creating source material that is resistant to biotic and abiotic factors when analyzing patterns of change and inheritance of characters when using the biotechnological elements in a technological scheme. The scientific tasks of increasing the efficiency of the breeding process for improving breeding schemes, establishing criteria and directions for the selection of hybridization components, expanding the spectrum of genetic variability of the initial samples using marker traits to create the source material of winter rye, soft winter wheat and winter triticale were solved with using a systematic approach. It was proved, that changing the architecture of plants is an effective tool for the formation of new morphobiological features and optimization of the structure of their population aimed at increasing the productivity of the culture and possibly the access to the hybridization of materials of wide genetic basis from ecologically and geographically distant areas.