Shevchenko А. Productivity features variability and its use in spring barley selection

Object of research is the variability of spring barley varieties and variety samples breeding characters depending on the gradient of density of sowing. Aim is the study the variability of traits, determine their adaptability and stability of spring barley at different growth conditions, the choice of backgrounds for effective evaluation and selection of breeding material by individual productivity indicators by the using the methods of quantitative analysis. Methods: general science, field, laboratory, statistical, correlation and genetic analysis for establish patterns of variability, stability and adaptability. Results: 20 populations have been created as a result of hybridization according to a full diallel scheme and valuable lines have been recommended as a new initial material for breeding. Novelty - firstly components of the productivity traits of display plants different sowing density gradients for estimate the parameters of barley lines of adaptive capacity and stability of varieties are scientifically grounded, defined the role of environment and their interaction with genotypes of varieties. Sowing crop density gradients as a habitat, which have specific properties of the adaptive and differentiating ability, have been characterized. Firstly the reasonability of useless of correlation coefficients of spring barley quantitative traits for the process-modules have been grounded. Branch - agriculture.