The study of the relationship between traits and resistance to fusarium head blight (fhb) in spring wheat genotypes
FHB is one of the most worldwide important diseases which both reduces the function and the quality of the seeds and infects them to fungous toxins. Various methods to control crop disease contain chemical control, agronomic control and amend to create resistant varieties. Amend to create resistant varieties are known as the best method to control the disease. Better understanding the relationship between plant morphological traits and resistance to FHB can be effective in a successful implementing a reform program. In this experiment the relationship between the disease indicators with each other and morphological traits such as the plant height, peduncle length and density of spikelet on the spikes was accomplished. A significant and negative correlation was observed between plant height and peduncle length and susceptibility to FHB. The existence of long-legged in wheat crop is considered as an undesirable agronomic trait, so the correlation between these traits with resistance to FHB is not suitable for reformers. In this study by drawing twodimensional diagram of the sensitivity of spikelet on the spike, the selection of high density genotypes and good resistance to FHB was started out. Considering the high density of spikelet can be a positive trait in an operation. In this study by drawing two-dimensional diagram of sensitivity component against the density of spikelet on the spike was accomplished to high density genotypes and proper resistance to FHB. © IDOSI Publications, 2012.