Bulgarian Journal of Agricultural Science
Array ( [session_started] => 1761668434 [LANGUAGE] => EN [LEPTON_SESSION] => 1 )
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In vitro selection of tomato plants resistant to Fusarium oxysporum f. sp. lycopersici and Verticillium dahliae
Zhana Ivanovaorcid, Katya Vasilevaorcid
Abstract: Water scarcity, low and high temperatures, pests, and diseases harm the quality and yield of tomato production worldwide. To meet the increasing demand, it is necessary to develop new high-yielding varieties that combine disease resistance and fruit quality, suitable for cultivation in diverse climatic conditions. The present study aimed to create resistance in tomato plants against soil-borne fungal pathogens, Fusarium oxysporum f. sp. lycopersici and Verticillium dahliae, through an in vitro cell line selection approach. Cotyledonary explants of two tomato variants (Ideal and L1620) were tested to obtain resistant shoots to pathogens Fusarium oxysporum f. sp. lycopersici and Verticillium dahliae. The cotyledon explants were cultured on Murashige and Skoog basal medium supplemented with 2,2 mg/L kinetin and 1.6 mg/L IAA. To the medium were added three concentrations - 30% v/v, 40% v/v, and 50% v/v of the culture filtrates from two strains of the pathogens Fusarium oxysporum and Verticillium dahliae.
A total number of 21,99 regenerated plants resistant to Fusarium oxysporum f. sp. lycopersici and 9,66 plants resistant to Verticillium dahliae were obtained from the local variety Ideal at the highest concentration of pathogens (50%). From line L1620, 17,00 regenerated plants were obtained, showing resistance to a 50% concentration of the Fusarium culture filtrate, and 22,66 plants were resistant to Verticillium dahliae.
Keywords: culture filtrate; explants; fungal pathogens; in vitro screening; Solanum lycopersicum L.; somaclonal variation
Citation: Ivanova, Zh. & Vasileva, K. (2025). In vitro selection of tomato plants resistant to Fusarium oxysporum f. sp. lycopersici and Verticillium dahliae. Bulg. J. Agric. Sci., 31(5), 983–990
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Date published: 2025-10-28
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