Influence of the Fusarium oxysporum fungus on the transgressive potential of growth traits of common wheat

The purpose of the research was to establish the reaction of 7 parents, 4 pairs of F2 hybrids of common winter wheat, obtained based on 4 pairs of reciprocal F1 hybrids, and the transgressive potential of growth and development organs to the treatment of grains with Fusarium oxysporum culture filtrate. The pathogen was isolated from wheat plants with root rot symptoms and identified by macro- and microscopic methods. The culture filtrate (CF) was prepared on the basis of Cszapek liquid medium. After treating the grains for 18 hours with CF, the seedlings were cultivated for 6 days, after which morphometric analyses of growth characters were performed. Plant distribution histograms were analyzed according to variant and character. The degree (Tg), the frequency (Tf) of transgressions were calculated and the important role of the plant-pathogen interaction mode, the parental factor in the spectrum of phenotypic classes and transgressive manifestations in segregating populations were found.