name
Chukhir Irina Nikolaevna
Scholastic degree
•
Academic rank
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Honorary rank
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Organization, job position
• All-Russian Research Institute of Rice
Research interests
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Articles count: 2
Сформировать список работ, опубликованных в Научном журнале КубГАУ
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RICE QUANTITATIVE TRAITS CONTROLLING YIELD AND THEIR INHERITANCE
Description
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
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INHERITANCE OF PRODUCTIVITY TRAITS IN RICE HYBRIDS
Description
Great success in increasing rice production, and it has more than doubled, has occurred worldwide thanks to the use of modern high-yielding rice varieties developed by conventional breeding methods. In order to develop a new variety, it is important for the breeder to study the genetic and breeding value of various cultural and wild species - carriers of economically valuable traits, the identification of genes and groups of genes controlling the economically valuable traits, to study the patterns of their inheritance, to establish patterns of interaction between the genotype and the environment, explore the genetic and physiological-biochemical basis of the phenomenon of heterosis, improve methods of intraspecific, complex, stepwise and distant hybridization, to study a phenomenon of a sharp increase in the quantitative characteristics of crop plants, a more powerful growth of hybrids of the first generation compared with the parent individuals. Scientists of the past centuries, such as A.F. Wigman, W.Noden, V.Foke, and many others have been studying the phenomenon of hybrid power, which was first named “heterosis” in 1908 by J. Schell. At present, heterosis is understood as the phenomenon when hybrids of the first generation exceed their parental forms in terms of their biological values and economically valuable traits. The magnitude of heterosis of the first generation hybrids is determined by several methods in terms of percentages to the paternal, to the maternal form, to the average of both parents, and to a better or regionalized standard. By the magnitude of the dominance coefficient, researchers often determine the inheritance of a trait
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