Purpose of research is to highlighted the life and creative path of outstanding scientist in the field of plant genetics and breeding, Academician А. А. Sozinov, summarize his creative initiatives, achievements on development of agricultural research in Ukraine. Research methods are common scientific – analysis, synthesis, classification; historical – problem-chronological, comparativehistorical, retrospective, biographical. Results. The scientist`s contribution to the establishment of leading scientific centres – Plant Breeding and Genetic Institute – National Center of Seed and Cultivar Investigation of NAAS, N. I. Vavilov`s Institute of General Genetics, VASHNIL, NAAS and others was substantiated. The role of his scientific school in the development of biochemical and molecular genetics of plants was shown. Conclusions. The scientific heritage of the scientist was systematized in such areas: plant genetics and selection, biology and morphology, anatomy and cytology, agrophytocenosis, agrobiotechnology, environmental problems of agriculture, seed production, genomics problems.