Grain crops samples assessment for ecological stability according to valuable breeding traits

The purpose of the study is to analyze and systematize the results concerning the assessment of the environmental stability of samples of the main grain crops based on production characteristics and physical and chemical characteristics of the grain. The names of samples of wheat, barley, oats and rye with the maximum level of stability for a number of valuable breeding traits are given. For barley and oats, it was demonstrated that there is a significant positive, and for wheat, a negative relationship between the ave¬rage yield of samples and the level of their stability for this trait. The severity of the traits “duration of the growing season”, “weight of 1000 grains” and “filmicness” of samples of all studied crops positively correlated with the levels of their stability for them. A positive relationship was found between the average nature values of oat and hulless barley samples, on the one hand, and their stability levels for this physical trait, on the other, and a negative relationship for chaffy barley and rye. It was shown that the value of grain density of barley samples negatively correlated with the value of their stability according to this cha-racteristic. It is assumed that the use for growing varieties of barley with increased levels of β-glucans, protein, oil and calcium in the grain, as well as wheat and oats with the same value of total antioxidant content (TAC), or carrying out plus-sampling for these biochemical traits will not be accompanied by a decrease in their stability in terms of the content of the listed substances in the grain. It has been proven that, based on data on the stability of samples based on the weight of 1000 grains, it is possible to carry out a non-damaging indirect assessment of their environmental stability based on the value of SSA in wheat grain, the content of β-glucans in hulless barley, and the protein concentration in hulless oats using the Hom and PUSS parameters. In addition, using the SF and Cs indicators, it is possible to evaluate hulled oat samples for stability in terms of the concentration of calcium and phosphorus in the grain based on calculating their stability based on the weight of 1000 grains.