Dorota H. Manifestation of economically valuable traits in breeding samples and their application in the creation of fiber flax varieties in the Western Forest-Steppe of Ukraine

The object of research - the formation of productive and adaptive potential of long flax, the allocation of sources with a high level of seed and technical productivity, the creation of a new source material of long flax. The purpose of research is to theoretically substantiate the formation of valuable economic traits in breeding samples of flax and hybrid material F1, F2. The scientific novelty of the obtained results lies in the theoretical substantiation and solution of an important scientific problem regarding the manifestation of economically valuable traits in breeding samples and their application in the creation of long flax varieties. For the first time in the soil and climatic conditions of the Western Forest-Steppe of Ukraine the complex research of samples of long flax of different ecological and geographical origin and constant selection forms is characterized and the sources of valuable economic features are determined; established by analysis of inherited hybrids by the degree of phenotypic dominance of productivity traits; variability, inheritance of valuable economic traits are determined and stable samples on seed and technical productivity are allocated; the level of manifestation of positive transgressions according to the indicators of productivity elements is determined. According to the results of the research, a line of fiber flax LZU-2 was created and registered under the number of the National catalog UF 0402016 at the Institute of Plant science named after V. Ya. Yuriev of NAAS, the National Center for Plant Genetic Resources of Ukraine. Also were registered two varieties of fiber flax Miandr and Oberih (whose parental forms are Ninke × Belan and Luna × Mohylevskyi-2) of different ripeness groups, highly productive in seeds and straw as well as in fiber quality.