ADAPTABILITY OF OATS ACCESSIONS IN YIELD AND PROTEIN CONTENT IN THE GRAIN IN THE CONDITIONS OF EASTERN SIBERIA

The aim of this work was to determine the adaptive potential of oat accessions grown under the conditions of the Krasnoyarsk forest-steppe in terms of yield and protein content in grain and to analyze the relationship between the adaptability indices of the accessions for these traits. The object of the study was 13 hulled and 5 naked oat accessions from the collection of the All-Russian Institute of Plant Genetic Resources named after N.I. Vavilov, which were grown for three years. In oat accessions, the yield and protein content in grain were determined according to Kjeldahl. For each of these traits, four parameters of the adaptability of oat samples were calculated: the coefficient of ecological variation Cv, the index of stress resistance d, the parameter of homeostaticity Hom, the index of the level and stability of the variety PUSS. It was found that hulled oat accessions had a higher yield, but formed a grain with a low protein content. According to the maximum yield value, the hulled accessions Envis and Medved, as well as the naked variety- the standard Golets, were distinguished. According to the highest protein content in the grain, the accessions Mestnii Tunis 1 and Vyatka were noted. Naked forms compared with hulled ones were characterized by higher average values of plasticity parameters (Cv, d), but lower indicators from the stability group (Hom and PUSS) both in terms of protein content in grain and in terms of yield. These differences were insignificant. Sapsan and Vyatka accessions were recorded as the most adaptive in terms of yield, and Sayan and Taidon varieties were determined on the basis of "protein content in grain". The results obtained indicate that the selection of oats for stability in terms of protein content in grain, in all likelihood, will not be accompanied by a decrease or increase in the stability of samples in terms of yield. It was found that when sampling for an increased protein content in grain, the stability of the manifestation of this trait will not change significantly over the years. In the case of selection of oats for increased yield, the stability of the manifestation of this sign will also not change significantly.