Evaluation between resistances to Fusarium oxysporum f. sp. melonis and some biochemical and morphological traits in some Iranian endemic cantaloupe (Cucumis melo L.) landrace

Study on relationships between resistance and its components will improve the efficiency of a breeding program with appropriate selection criteria. In this study, 57 endemic landrace and differential genotype of melon were studied to study the relationship between resistance and resistance component in a randomized complete block design with tree replication. 13 trait, including the percentage of dead plants and biochemical and morphological characteristics were evaluated. The simple correlation coefficient were significant at 1% between the percentage of dead plants with traits such as latent period, disease severity, area under disease progress curve, peroxidase, polyphenol oxidase, phenol Compound, catalase and superoxide dismutase. The results of the factor analysis showed that three independent factors justify 80.24% of the total variance. So that three factors were named as the viability and biochemical characteristics, root features and shoot features. The results of path analysis showed that superoxide dismutase due to the high direct effect and high indirect effects through other traits can be used as an indicator for increasing resistance to Fusarium oxysporum f. sp. melonis race 1.2 (Fom 1.2).