Relevance. The evaluation of adaptive ability of varieties is an actual direction in selection. Phenotypic plasticity of legume crops, in particular green bean, in Siberian region has not been studied enough. There is a need to evaluate grade samples for adaptability and stability, as highly and medium adaptive varieties can realize their genetic potential of productivity in extreme continental climate of Western Siberia.Materials and methods. On the basis Department of Selection, Genetics and Forestry, Novosibirsk State Agrarian University (2015-2019), long-term evaluation of grade samples of green bean of different ecological and geographical origin with a bush type of growth was carried out. Of particular interest are signs that have a significant impact on crop productivity. The signs were studied: number of beans on plant, weight of beans from plant, weight of one bean, yield capacity. The objective of the study is to evaluate the adaptive ability and stability of common bean varieties in the conditions of Siberian region.Results. The conditions of Western Siberia are suitable for cultivating vegetable beans on a green spatula and seeds. It has been established that, based on the weight of one bean, the coefficient of variation has a negative value. This indicates a low variability of the trait depending on the natural and climatic conditions, which allows selection of breeding valuable varieties for this parameter. As a result of the study, 6 genotypes of the crop, combining high productivity and environmental resistance, were selected. It was established that varieties Veronika and Darina can be referred to non-plastic samples. Samples could diversify breeding material of the crop and show the value according to specific features in edaphic-climatic conditions of Western Siberia.

Relevance. Crop productivity is determined by genotype, environmental effects and their interactions. Comprehensive evaluation of crop varieties based on their adaptability, plasticity and stability makes it possible to select the most promising varieties, high-yielding and adapted to many environmental conditions to improve productivity.Materials and Methods. Fourteen common bean varieties were tested in a randomized complete block design with three replications during two years (2022 and 2023) in the experimental field “Michurintsev Garden” of Novosibirsk State Agrarian University. Productivity traits were taken into account: number and weight of beans per plant, weight of 1000 seeds, yield. The purpose of the work was to evaluate bean samples for adaptive capacity and ecological stability in the conditions of the forest-steppe Priobie.Results. The article provides an assessment of the adaptability and stability of bean varieties in order to identify varieties with high productivity and adapted to climatic and farming conditions in the Siberian region. The results of the tests showed that the highest average net yields of Rubin, Krasnopestraya, Zolotistaya and Muhranula varieties were in the range of 0.41-0.64 kg/m2. Analysis of genotype-environment interaction (GxE) according to the mathematical model of Eberhart and Russel shows that varieties Rubin, Krasnopestraya, Zolotistaya and Muhranula have high indices of general adaptability and breeding value of genotype, Among them, varieties Rubin and Zolotistaya have stable productivity and high adaptability to environmental conditions.

Relevance. The use of biological preparations in agricultural technology of agricultural crops contributes to the preservation of agrophytocenosis, reduces environmental pollution and has a positive effect on the growth and development of the plants themselves. In this regard, the determination of the effectiveness of the use of biological products in the presowing treatment of common bean seeds is relevant and timely.Materials and methods. In our study, we studied the effect of presowing treatment of common bean seeds with biological products: Polydon Bio Profi, Polydon Amino Mix, Polydon Aminomix, Alfastim on germination energy, germination, seed sprout size, number of roots and length of the root system. Three varieties were taken as objects of study: Athlete, Omichka, Sirenevaya.Results. A different effect of preparations on the time of seed germination was revealed. The average germination time in options 1-4 was higher than the control values for all varieties, i.e. drugs slowed down germination. The seeds of the tested varieties responded positively to treatment with Alfastim (option 5): the average germination time in Fizkulturnitsa and Sirenevaya decreased by 8.5 and 9.8%, in the Omichka variety by 45%, compared with the control. Among the tested varieties, it is necessary to single out the Sirenevaya variety, which has the highest germination energy (ES) from 90% to 100% and seed germination (VS) from 98-100% in all treatment options. The most effective treatment of the Omichka variety was in option 2 (EP-90%, germination rate 90%), the values exceeded the control by 5%. For all options, the germination energy of the Fizkulturnitsa variety ranged from 72 to 90%, germination from 73 to 93%. A positive effect of drugs on the germination of seeds of this variety was established. The defeat of bean seeds by mold fungi was noted. Seed damage is mild to moderate. Seed damage by mold fungi in the variants using Polydon Bio Profi was absent, or it was weak up to 3.3% for all tested varieties. Morphobiometric indicators of seedlings and their root system in all varieties developed more effectively on variants with the use of Polydon Bio Profi and Alfastim preparations, and their mixtures