Skorokhodov M. Peculiar properties of seed longevity of underutilized wheat forms at storage

Object of research: biological bases of agricultural crops seed longevity. The purpose of the study: to establish the patterns of wheat underutilized species and forms seed longevity manifestation in connection with its long-term storage. Research methods: general scientific, laboratory, measuring, biochemical, statistical. The novelty lies in solving an important scientific question of prolonging wheat underutilized species and forms seed longevity during storage. For the first time, the role of hulls in the hulled wheats seed longevity is revealed, which is the effect of the hulls presence on the seed endurance to accelerated aging and freezing at -20 оС and therefore on the seed longevity. A comparative reaction of seed of specific wheat species and forms accessions to different modes of accelerated aging and freezing at a temperature of -20 оС is revealed. The connection between the antioxidant activity of the seed and its longevity under different modes of accelerated aging and in freezing conditions has been established. Results: on the basis of the conducted researches during 2015-2018, there are established the dependence of seed longevity of hulled wheat species on presence of hulls; the ability to diagnose the seed longevity by the initial level of antioxidant activity; optimal seed moisture during storage; the scopes of application of each of the two methods of accelerated aging are determined. Degree of implementation: sowing and depositing for long-term storage of the seeds of hulled wheats free from scales, dried to a moisture content of 5-6% are introduced at Kharkiv National Agrarian University named after V.V. Dokuchaev, at the Ustymivka Research Station of Plant Production of the Plant Production Institute named after V.Ya. Yuriev of NAAS; diagnosing the seed longevity by the initial level of antioxidant activity – in the Kharkiv National Agrarian University named after V.V. Dokuchaev. The seed of hulled wheat species preserved on the basis of established patterns are used in the educational process at Uman National University of Horticulture. Scope of implementation: It is recommended to use the obtained results of the researches in the National Plant Gene Pool Accessions Depository of Ukraine of the Plant Production Institute named after V.Ya. Yuriev of NAAS, Doublet Depository of Genepool Accessions in Ustymivka Research Station of Plant Production, in breeding and research institutions for the storage of cereals seed as well as in a training programs of higher and secondary educational institutions