Results and perspectives of selection of naked oat varieties in the Northern Steppe of Ukraine

The results and prospects of selection of naked oat varieties in the conditions of the Northern Steppe of Ukraine were given. The problems and main directions of creating of new initial material were determined. The high-yielding, large-grain genotypes (Thousand Grain Weight was to 25.3–29.1 g) such as Abel, Rhea, Nuprime, Plater, Adam, Biloruskyi, Pushkinskyi, Hosha, Kriepysh resistant to abiotic factors were used in hybridization, and allowed to create a new hybrid combinations of naked oats. We established that the cultivars significantly differed from each other in the spikelets and grains number per plant, however not always these features quite affected the plant productivity. Thus, it is proved that the set of features such as number of spikelets in the panicle, number of grains in the spikelet and the grain size determines the plant productivity. The best initial forms of naked oats by biological and economic features were specified. The characteristics of the new initial material were highlighted, and the results of breeding work were presented. The naked oat cultivars were selected in the control nursery: Ск 1024/10, Рс 72/09, Сс 732/10, their grain yield (2.59–2.66 t/ha) significantly exceeded the standard variety (by 0, 35–0.42 t/ha) on average for 3 years. The most productive cultivars by protein content (15.9–16.2 %) were Рс 72/09, СС 1136/09, Сс 732/10 and Сп 234/10. The average yield (2.58 t/ha) of Rodonit naked oat variety exceeded the Skarb Ukrainy national standard variety by 0.33 t/ha or by 14.7 % according to the three-year competitive variety test. Since 2019, Rodonit has been understate variety testing. The protein content of 16.1 % and the starch of 49.0 % were in the grain, and the number of hulled grains did not exceed 3.0 %. The growing season of Rodonit variety was 91 days which was three days longer than the standard variety. Key words: oat, variety, hybridization, selection, yield, hybrid combinations.