Abstract
Under the conditions of global climate change, there is a geographical change in the area of development and distribution of the most dangerous pathogens of grain crops, as a result, the harmfulness of epidemics increases. In this case, it is important to control the phytopathogens of yellow rust (P. striiformis f. sp. tritici) and leaf rust (P. triticina f. sp. tritici), the main types of diseases in the fields of winter wheat in southeastern Kazakhstan. In years favorable for the development of phytopathogens, there is a sharp decrease in the yield of spikelets and grain quality. New aggressive types of pathogens make most high-potential, valuable varieties of grain crops vulnerable to the pathogen. In order to determine the immunological value of winter wheat varieties in breeding, in 2021-2023, immunological studies were carried out on the experimental basis of the Kazakh Research Institute of Agriculture and Plant Growing. A collection of 200 domestic and foreign varieties of winter wheat was subjected to a targeted immunological assessment, under conditions of an artificially infectious background of rust. Artificial infestations were carried out using yellow rust (P. striiformis f. sp. tritici) and leaf rust (P. triticina f. sp. tritici) uredospore populations. The resistance of winter wheat to rust was analyzed in the conditions of the south-east of Kazakhstan. The reaction of resistance of valuable varieties to rust pathogens is described. Disease-resistant varieties selected as a result of immunological evaluation have the greatest immunological value for breeding.
01 Introduction
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02 References
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