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UTILIZING INDUCED MUTAGENESIS IN KAZAKHSTANI WHEAT BREEDING

https://doi.org/10.54596/2309-6977-2022-1-112-120

Abstract

Mutagenic effect of physical factors and chemical substances (aziridine or ethylene imine, nitrosoethylurea, nitrosoethyleneurea) leads to increase of the spectrum of hereditary variability for breeding purposes, which however is not studied in full extent. Ecological study of anthropogenic factors action leading to disruption of certain links between chemical elements and their combinations, raise of heavy metals concentration in soil, facilitate examination of mutagenic and toxic properties of heavy metals. Increase in wheat yields by improving its genotype is one of the most urgent problems of agriculture and economy. At present, using traditional methods of selection and genetic studies, such as backcross selection, distant hybridization, and experimental mutagenesis, increased efficiency of obtaining genetically modified and improved forms of wheat [1-5]. Heavy metals are defined as metals having a density higher than 5 g/cm3. Of the total 90 naturally occurring elements divided into three classes by the degree of their threat, 53 are considered heavy metals and few are of biological importance. Accumulation of heavy metals such as cadmium (Cd) in the environment is now becoming a major cause of environmental pollution. Toxic metals can inactivate proteins, shifting metal cofactors, blocking active centers or causing allosteric changes. Besides, large number of those possesses ability of inducing mutagenic changes, tumors and causing macroscopic changes. Molecular mechanism of heavy metals toxicity is not completely understood. Cd is non-essential element that negatively affects plant growth and development, released into the environment by power stations, heating systems, metal working industries or urban traffic, which has high cumulative effect with almost no biodegradation. In plants it affects such processes as stomata opening, transpiration and photosynthesis, consequently chlorosis, leaf rolls and stunting are the main symptoms of Cd toxicity in plants accompanied by root browning, leaf red-brownish discoloration. It can also reduce the absorption of nitrate from root to shoot by inhibiting the nitrate reductase activity in shoots. The negative effect of Cd on plant growth was accompanied by an increase in dry to fresh mass ratio in all organs. Several researches have suggested that an oxidative stress could be involved in cadmium toxicity, by either inducing oxygen free radical production, or by decreasing enzymatic and non-enzymatic antioxidants [6-9]. On the other hand, the use of induced mutagenesis showed high efficiency in the production of forms with high yield, quality bakery, lodging resistance, modified plant height and resistance. And, this paper is an attempt of summarizing results performed by our group in this direction.

About the Authors

Zh. Zh. Chunetova
Al-Farabi Kazakh National University
Kazakhstan

Ph.D., associate Professor of the Department of genetics and molecular biology

Almaty



D. M. Iskakova
Al-Farabi Kazakh National University
Kazakhstan

2nd year Master's student

Almaty



Sh. M. Argynbaev
Al-Farabi Kazakh National University
Kazakhstan

C.b.N. lecturer in genetics and molecular biology

Almaty



B. A. Ertayeva
Al-Farabi Kazakh National University
Kazakhstan

teacher of the Department of genetics and molecular biology

Almaty



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Review

For citations:


Chunetova Zh.Zh., Iskakova D.M., Argynbaev Sh.M., Ertayeva B.A. UTILIZING INDUCED MUTAGENESIS IN KAZAKHSTANI WHEAT BREEDING. Vestnik of M. Kozybayev North Kazakhstan University. 2022;(1 (53)):112-120. https://doi.org/10.54596/2309-6977-2022-1-112-120

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