Scientific Journal of KubSAU

Rice is a crop with high yields guaranteed by nature itself. In recent years, huge changes have occurred in the domestic rice cultivation, but despite this, there are still a lot of unsolved relevant problems. One of such problems is the development of high yielding varieties. The success of breeding largely depends on the availability of genetically diverse starting material with a wide response to changing environmental conditions, its knowledge and proper selection; as well as the identification of new sources of valuable traits and properties, among ecologically remote agro-types that enrich the genetic potential of domestic varieties. Development of a high-yielding variety is greatly influenced by economically important traits: plant height, total and productive tillering, the number of spikelets and grains in the panicle, grain size, weight of 1000 grains, etc. In modern biological science of heredity, there is still the question of the inheritance of quantitative traits. The study of inheritance of quantitative traits constituting the main elements of the yield structure is one of the most important tasks, the solution of which is necessary to speed up the breeding process. Inheritance of any trait is often determined by researchers by the magnitude of the dominance coefficient