Published in Scientific Papers. Series B, Horticulture, Vol. LXIII, Issue 1
Written by Nădejda MIHNEA, Galina LUPAȘCU, Svetlana GAVZER, Dumitru OȚEL
In the paper are presented the peculiarities of reaction of the new created tomato lines to the treatment with the culture filtrates (CF) of some important phytopathogens - Alternaria alternata, Fusarium oxysporum, F. solani, based on germination, stem length and embryonic roots. The clusterian analysis (k-mean method) proved that, in comparison to A. alternata, the F. oxysporum and F. solani fungus species exhibited a higher discriminative capacity of the tomato clusters based on the root and stem length, which reveals the specificity of greater interaction with these pathogens. Clusters of tomato genotypes with diminished reaction to Fusarium spp., A. alternata pathogens have been identified, which is important for their involvement in the breeding programs. By factorial analysis of the variance, it was found that for the embryonic root of the tomatoes, the major contribution to the source of variation in character had the genotype of the plant, its contribution constituting 46.7%, and for the growth of the stem – factor of isolate: 62.5%.
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