Transfering of Resistance Genes Pi-1 and Pi-2 to Blast in Tarom Dailamani Rice Cultivar

Rice cultivar Tarom Dilamani becauded a fragrance, flavor, cooking and marketingis a qualitative rice in Iran. This cultivar have high susceptibility against blast disease(Magnaporthe grisea). One of the important trouble producers of the Dilamani's ricecultivar is chemical control against blast disease and cause poisonous pollution ofnatural environment. The best manner in order to control this disease and avoid itsdamage is preparation and cultivation resistant cultivar. In this research we usedclassical breeding method to developing resistance cultivar. Female parent wasqualitative Tarom Dilamani cultivar and male parent was near isogenic lines C101LACand C101A51 that carry dominant resistant genes to blast Pi-1 and Pi-2, respectivly.Parent's seeds prepared, cultivated and propagated. When rice plant entered floweringstage, sensitive cultivar was confluenced with resistant line's pollen. Hybrid seedswould cultivated next year. Plants cause selected according to morphological charactersand virulences tests. Back cross was accomplished until four years until Bc4 generation.Plant inoculation was accomplished with dominant race of fungus cause blast atAgricultural Research Station of Sari Agricultural sciences and Natural Researchuniversity. Results of this research was transferred two resistance genes in sensitiveTarom Dilamani cultivar. The recovered cultivar showed resistance to races of funguscause blast on region. Infection type of sensitivity (4 and 5) that was prior ofaccomplished of this research have converted to infection type of resistance (1 and 2).Morphology and quality of plant changed slightly, but was satisfactory prevention ofdamage due blast and increase grain yield.