Hulled barley samples plasticity and stability by the content of b-glucans in the grain and its size under the Krasnoyarsk forest-steppe conditions

Research has calculated the adaptability of barley samples by the content of β-glucans in the grain and the weight of 1000 grains, as well as the analyzed the relationship between different indicators of the adaptability of the samples for these traits. The study involved 18 accessions of hulled barley from the collection of the All-Russian Institute of Plant Genetic Resource named after N.I. Vavilov, which were grown for three years in the conditions of the Krasnoyarsk forest-steppe. The content of β-glucans in the grain was measured on an automatic grain analyzer Infratec Analyzer 1241 using a 50 ml cuvette, the weight of 1000 grains was determined by the standard method. For each of the studied traits of barley samples, two parameters of ecological plasticity (coefficient of variation Cv and stress resistance index d) and four stability parameters (indicator of the level and stability of the variety PUSS, the homeostatic parameter Hom, the stability factor SF and the indicator of the selection value of the variety Cs) were calculated. It was found that the share of the contribution of the barley growing year to the variation of both traits was higher than that of the genotype. The contribution of the genotype to the variability of the trait "mass of 1000 grains" was more than three times higher than that for the trait "content of β-glucans in the grain". It was found that the smallest value of plasticity and the highest value of stability (respectively, the minimum sum of ranks) in terms of the content of β-glucans in the grain of barley differed in the sample Krasnoyarsky 80, and in terms of weight of 1000 grains - Omsky 96. The least valuable in terms of adaptability parameters with the maximum sum of ranks were barley samples Tanai and Mayak. It is shown that barley samples with a larger mass of 1000 grains were characterized by higher values of all stability parameters for this trait, and this relationship was statistically proven for the parameter Cs. The found result may speak in favor of the fact that successful selection of barley for the maximum stability of samples on the basis of "mass of 1000 grains" will be accompanied by an increase in grain size.