THE INFLUENCE OF FUSARIUM OXYSPORUM AND ALTERNARIA ALTERNATA FUNGI ON VARIABILITY AND HERITABILITY OF THE TOMATO GROWTH CHARACTERISTICS

As a result of the analysis of the sensitivity of the tomato perspective lines to the culture filtrates ( CF) Alternaria alternata and Fusarium oxysporum, it was found that in the most of the cases they did not significantly influence seeds germination, but in all the cases, inhibition of the embryonic root length and stem occurred. By bifactorial analysis of the variance it was found that for the seeds germination, the genotypic factor was the most important in the reaction to F. oxysporum and A. alternata isolates, and for the growth of embryonic root and stem in both variants a major influence belongs to the fungus isolate. Genotypic and phenotypic variations varied to a large extent depending on the isolate and the analyzed character. High coefficient of heritability in the broad sense (h(2) = 0.60-0.95) indicates a good heredity of the studied characters in the interaction with the isolates of F. oxysporum and A. alternata fungi. We mention that the coefficient of genotypic variation varied widely - 17.8-73.1% for the studied characters, which proves the genetic and environmental nature of their variability.