Evaluation of Resistance and Damage of Fusarium Head Blight in wheat Promising and Advanced Genotypes in Hot and Humid Conditions in North of Iran

The project disease index tolerance and yield components of 60wheat genotypes advanced and promising of hot and humid climate were evaluated in two years (2011-2012) to Fusarium head blight of wheat in the field conditions. Wheat infected spikes were collected in regional fields, separation, purification and identification performed in the laboratory. Genotypes were culture in the field in statistics design and were inoculated with a mixture of two races of causal fungi disease (Fusariumgraminearum, F.culmorum). In doughy stage, record dons of response of genotypes to disease-causing. At harvested stage, the entire plot harvested and measured performance indicators. Statistical analysis of the data was performed using statistical software. The results showed that the genotypes of sensitivity, tolerance and yield components have many differences. In cluster analysis of disease index and yield components data and drawing dendrogram, genotypes were divided into three to four groups with different genetic that the most genotypes were susceptible and moderately susceptible group. Study of the disease index and sensitivity index of genotypes, those in pedigree parental was such as Shanghai, Wang- shubai, Kauz, Milan and Babax were good in all ways.