Abstract
Blast is a rice disease that affects all above-ground parts of the plant, such as nodes, stems, panicles, leaves, etc. Damage to these plant organs negatively affects the developmental stage, that is, the growing season of the plant. As a result, it is the reason for the formation of puny seeds and decreased productivity. The creation of lines and varieties resistant to blast disease is an urgent problem for all regions involved in rice growing. The reason is the rapid adaptation of the pathogen to environmental conditions, as well as to the immune defense of plants. This research includes results of crossing domestic highly productive zoned varieties with donor varieties of blast resistance genes. Three lines have been identified that carry the blast resistance gene Pi b in their genotype. To assess the productivity of the resulting lines, the elements of the crop structure were assessed and the preservation of productivity by the new lines was determined.