Abstract
The article presents the results of immunological evaluation of spring wheat samples with Lr genes for resistance to leaf rust. The purpose of the performed studies was the immunological evaluation and selection of sources of spring wheat resistance to leaf rust. The bjects of the study were samples of spring wheat from nurseries 6th ILRTN-15 and 18KASIB-LR-RES. Its scientific novelty consisted in the identification of effective Lr genes of resistance of spring wheat to the Kazakh population of leaf rust. Immunological studies were carried out in 2019-2020 in the conditions of the Kostanay region against a natural background of infection of wheat and in the conditions of the Almaty region against an artificially infectious background of infection of spring wheat. As a result of screening in the conditions of the regions of our study, 70 varieties and lines with effective Lr genes were identified as resistant. Thus, varieties and lines with Lr genes selected for leaf rust resistance are recommended by us as sources of resistance to the local leaf rust population.
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