The Evaluation of Stripe rust Resistance sources in Selected Wheat Genotypes to Puccinia striiformis f. sp. tritici Races

Yellow or stripe rust caused by Puccinia striiformis f. sp. tritici, is the most important disease in terms of the amount of damages to wheat crop in the worldwide. The best method used to control this disease is the application of resistant cultivars. So, It is absolutely necessary for determine the virulence factors of stripe rust and evaluation of host resistance in different growing level. To study evaluation of resistance sources to stripe rust, twenty wheat genotypes were separately evaluated in the forms of randomized complete block design with three replications in the seedling stage under greenhouse condition with 20 races of stripe rust 6E158A, 230E158A, 198E150A, 134E150A, 6E150A, 166E150A, 198E130A, 166E158A, 70E0A, 6E16A, 102E134A, 6E134A, 6E130A, 6E150A, 6E6A, 70E50A, 6E18A, 134E22A, 166E254A and166E134A. The components of resistance including latent period and infection type were recorded under greenhouse condition. Results indicated genotypes were evaluated in terms of both traits were significant at 1% level. 30% genotypes (Mv17, M-85-7, Aflak, Morvarid, Sivand and Parsi) were completing resistant to all races studied. Probably, in resistant genotypes each of the resistance genes, Yr1, Yr3, Yr4, Yr5, Yr10, Yr15,Yr24 or the other unknown genes which are types of seedling resistance are either alone or in combination of one another cause strength in resistant genotypes. Resistant genotypes have seedling resistance genes, which could be used as resistance source in breeding programs.