В статье представлены данные по реакции ростовых органов растений томата различного эколого-географического происхождения на ранней стадии онтогенеза на культуральные фильтраты (КФ) грибов Alternaria alternata и Fusarium spp. Выявлена генетическая природа вариабельности и степень наследуемости органов роста и развития томата при взаимодействии с патогенами.

The paper presents the results of the appreciation of some tomato varieties and lines from the collection of the Institute of Genetics, Physiology and Plant Protection of the Republic of Moldova based on the reaction to fungal pathogens Alternaria alternata, Fusarium oxysporum, F. solani, the variability and heritability of tomato growth signs. As a result of the analysis of the reaction of tomato genotypes to the culture filtrates (CF) of fungi, it was found that in the most cases they had a negative influence on seed germination. An inhibition of less than 15% in all FCs studied was recorded in the Flacăra, Mary Gratefully and L 10 B genotypes, thus showing interest in the breeding process as possible donors of complex resistance to the seed germination stage. Root and stem growth in the evaluated varieties and lines was most strongly influenced by F. solani and A. alternata, the average values relative to the control varying within the limits –46.9...–80.3% and –47.1...82.0% for root; –55.0...–84.7% and –61.2...–85.7% – stem. The lowest sensitivity of root and stem to CF was recorded at L 66. A significant effect of CF on the genetic and phenotypic varieties of signs of growth and development of tomato plants, heritability in the broad sense, genotypic and phenotypic coefficient of variation, and genetic progress have been established.