The development of bioenergy in Ukraine requires the cultivation of energy crops as renewable sources of energy. Sugar beet hybrids created using valuable sterile and fertile forms can have a breeding perspective as a raw material for the production of biofuel. Therefore, the goal is to create experimental hybrids of sugar beets with high energy output, suitable for obtaining alternative types of biofuel, and to select the best of them. When creating sugar beet hybrids, 6 pollensterile and fertile samples of different ecological and genetic origins were used. The stages of the breeding process were the breeding of the original parental components, their evaluation by combining ability, and the formation of sugar beet hybrids based on the best of them. The method of multi-tester top-crosses and field tests of experimental sugar beet hybrids were applied. It was found that the parental components of sugar beet significantly differed among themselves in terms of bioethanol yield, the indicators of which ranged from 2.06 to 2.43 t/ha (TCS lines) and 2.23 to 2.73 t/ha (pollinators). The highest energy yield in topcross hybrids of sugar beets was noted in combinations created with the participation of polliniferous samples Iv.24869 (61.5 GJ/ha) and Iv.24845 (58.4 GJ/ha). Their effects of ZKZ were reliably positive and amounted to 6.7 and 4.0 GJ/ha, respectively. Numbers 1233-Jan.3 (2x) and 1183 02024 (2x) were recognized as the best pollinators of sugar beets. In the genotypic structure of variability of the "sugar yield" trait, the total share of the influence of valuable additive gene complexes of sugar beet parental forms (51 %) was almost equal to the share of non-additive interaction of components (49 %). By the method of combinatorial breeding, two new hybrid genotypes of sugar beets, suitable for the production of biofuel from renewable sources, were created, in which the energy yield exceeded the group standard by 10.6 and 12.6 %. Key words: bioenergy, sterile forms, pollinators, sugar beet hybrids, combining ability, energy output.

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The purpose of the study was to create a source breeding material and a variety of oat with high productivity, resistance to fungal diseases and high energy performance. Research methods. Field, laboratory, analytical and statistical. Results. When creating a new source breeding of oat, we used an individual offspring of hybrid material obtained as a result of long-term hybridization. According to the results of studies of five oat lines, breeding numbers of 12–5, 437–99, and 570–6 were selected, which have high grain yield of 5.3–6.4 t/ha, oil content of 4.2–6.1%, protein content of 10.7–15.6% and estimated energy yield from 243.6 / 1023.1 to 349.7 / 1469.0 kcal/kJ. The affection of the oat sowing lines by flying smut averaged 8–9 points and the crown rust 7–9 points. Line 12–5 had an average yield of 6.30 t/ha, which exceeded the average group standard by plant height by 4 cm, shorter vegetation period by 13 days, resistance to smut by 2 points, to rust by 1 point, lodging and shedding of grain by 0.5–1.5 points, low husk share of 23.1%, weight of 1000 grains 35.2 g under contrasting weather conditions. The line of oat ‘Denka was transferred to the State Scientific and Technical Expertise, where it was found that the growing season averaged 92 days, plant height 81–90 cm, resistance to lodging 8.5 points, high resistance to fungal diseases (8.5–9.0 points) and drought (9 points), grain yield was 4.31 (Polissia) and 4.80 t/ha (Forest-Steppe), respectively that by 0.99 and 1.25 t/ha exceeded the average yield of varieties. Conclusions. The lines of oat by plant height, panicle length, 1000 grains weight, grain nature, resistance to fungal diseases, productivity, quality, energy value were created. The ‘Denka’ oat cultivar had an average yield of 4.31 (Polissia) and 4.80 t/ha (ForestSteppe), which, respectively, exceeded the average yield of the varieties resistant to flying smut by 0.99 and 1.25 t/ha, respectively. The variety is listed in the Register of Plant Varieties of Ukraine Suitable for Distribution in the Forest-Steppe and Polissia since 2018.

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