In this study, five different genotypes namely: NCEBR-6 as a resource of early blight resistance and five domestic genotypes i.e., LA 2399, Edkawi, UCT5, Super strain-B and Peto-82 were used and the crosses were made to produce five populations and to be evaluated for early blight disease under nature infection of early blight during three seasons under the field and greenhouses conditions. Results indicated that