Investigation resistance genotypes of lentil against isolates of Fusarium wilt isolated from North and Razavi Khorasan Province

Screening is an important subject for breeding programs of resistant varieties of lentil. In recent years many developments were carried out in identification of resistant sources of germplasm of leguminous against soil-borne causes. Fusarium oxysporum f.sp. lentis is one of the important disease of lentil in the world and Iran. In this study, reactions of 30 lentil genotypes evaluated to find resistant sources against 10 isolates of Fusarium wilt, isolated from different fields of North and Razavi Khorasan provinces, in greenhouse condition. This genotypes inoculated using spore suspension and cultured in sterile soil. The disease severity was scored on a system of 1 to 9 of Bayaa. Results showed most percent of high resistance of genotypes related to HO3F3 (Razavi Khorasan) and most percent of resistance is RA1F1 (North Khorasan) in seedling stage. But, no genotypes caused resistance against isolates of Fusarium in reproductive stage. Of course, HO3F3 showed the least of aggressive of all isolates of Fusarium both in seedling and reproductive stage.