Balabak O. Scientific Basis for the Cultivation of Plants of the Genus Corylus L. in the Right Bank Forest-Steppe of Ukraine

The dissertation work presents theoretical generalization and scientifically justifies solving an important scientific task concerning the economic and biological peculiarities of the growth and development of hazelnut plants in Ukraine. The methodology of breeding work is developed; the selection scheme of species, forms, cultivars and hybrids of Corylus L. genus by traditional selection of free pollination and inter-cultivar hybridization seedlings is improved; progenies after controlled crossbreedings are observed as well. Variations of biochemical indices (oil content, protein compounds, essential amino acids) of the hazelnut genotypes fruit kernels depending on the cultivar characteristics are studied. The ratio of quantity of unsaturated fatty acids (active balance) to quantity of saturated fatty acids (passive balance) in nut oil of the researched hazelnuts is established. The oil content, iodine number, saponification number, kernel weight, fatty acid content, the ratio of unsaturated fatty acids to saturated ones depends on the cultivar. Economic efficiency of the planting material cultivation is defined depending on the developed agrotechnological measures in the conditions of the Right-Bank Forest Steppe Zone of Ukraine.