New Sources of Genetic Resistance to Race 3 of Fusarium Wilt of Tomato

Abstract

Wild Lycopersicon accessions were screened for resistance to race 3 of Fusarium oxysporum f. sp. lycopersici. Of the accessions examined, only L. hirsutum (LA 1777) and L. parviflorum (LA 2133) consistently failed to develop wilt symptoms after inoculation. Resistances in these two accessions were analyzed genetically. Results from these analyses suggested that the resistances were not monogenic dominant or monogenic recessive and, therefore, genetically different from the resistance observed previously in L. pennellii (LA 716)(.)