Journal of Crop Breeding

Leaf Rust or rust fungus Pucciniatriticinacauses leaf, Is one of the most destructive fungal disease of wheat worldwide. In this study, in order to resistance evaluate to brown rust on 41cultivars of wheat was in field and greenhouse situation and based on randomized complete block design with three replication. Traits including infection type, disease severity, Area under Disease Progress Curve and latent period were recorded. Analysis of variance showed significant differences between genotypes for all traits. Correlation analysis showed a high and positive correlation between the traits in the field and showed high and negative correlation between the traits in greenhouse situation. Cluster analysis based on Euclidean distance and complete linkage algorithm was used to clustering of genotypes. In the cluster analysis cultivars were divided in to 2 groups in field and 3 groups in greenhouse.