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Information × Registration Number 0223U005367, 0121U100437 , R & D reports Title Creation of selection material of bread spring wheat, resistant to harmful races of stem rust (Puccinia graminis f.sp. tritici Ericks and Henn.) popup.stage_title Head Demydov Oleksandr A., д.с.-г.н. Registration Date 22-12-2023 Organization Myronivsky Wheat Institute named after VM Crafts of the National Academy of Agrarian Sciences of Ukraine popup.description2  The object of the research consists of lines with known genes of resistance to stem rust (Puccinia graminis f. sp. tritici Eriks. and Henn.), spring bread wheat varieties, F1 hybrids and F2 populations. The purpose of the work was to create breeding material of spring bread wheat being resistant to stem rust, adapted to the conditions of the Forest Steppe of Ukraine. The research methodology is conventional in breeding work. Research results. The intensity of damage of spring wheat source material on artificial infectious background was determined. On natural infectious background, no manifestation of disease-causing agents was noted. A new hybrid material has been created. It was found that the inheritance of spike productivity components in F1 hybrids created from crossing lines with known stem rust resistance genes occurred according to the type of positive overdominance, partial positive dominance, intermediate inheritance and depression. The hybrids F1 with a high level of manifestation of true heterosis according to spike productivity components were identified. In hybrid combinations, a high value of the broad-sense heritability coefficient was noted; the value of the narrow-sense heritability coefficient was from 0.15 to 0.45. This indicates that the genotypic variability of the investigated traits is determined in most cases by non-additive (dominant) effects of genes. F2 hybrid combinations were identified, in which high degree and frequency of transgression for spike productivity components were noted. The obtained results indicate the possibility of successful selection work with the participation of varieties and lines with known resistance genes in the creation of new highly productive breeding material being resistant to pathogens. The field of application is grain production. Product Description popup.authors Ivantsova Liudmyla Volodymirivna Blyzniuk Ruslan Mykolayovych Kovalyshyna Hanna Mykolaivna Pirych Alina Volodymyrivna Fedorenko Maryna Viktorivna popup.nrat_date 2023-12-22 Close