Multiple sources of resistance to Fusarium wilt in tomato

Abstract:

The objective of this work was to evaluate the reaction of 48 tomato (Solanum lycopersicum) accessions, including ones of wild species, to isolates of the three Fusarium oxysporum f. sp. lycopersici (FOL) races. Molecular markers in close linkage to I-1, I-2, and I-3 resistance genes were used. The combination of bioassays and specific molecular markers showed high correlation levels for most accessions. Solanum peruvianum and S. corneliomuelleri accessions showed resistance to all FOL races; the introgression of resistance factors of these genotypes into elite tomato germplasm is of great significance to breeding programs.

Index terms:
Solanum lycopersicum; Fusarium oxysporum; genetic markers; disease resistance