Inheritance of stripe rust (Puccinia striiformis) resistance in wheat was studied by evaluating the response of six cultivars of hexaploid and ten F1 progeny of their half diallel mating crosses race of pathogen (134E182A+). Resistance components including latent period, infection type, pustule size and density were recorded. Analysis of variance showed significant differences between genotypes for all traits. These results were also indicative of reversal dominance. Diallel analysis, using Griffing and Hayman–Jinks methods showed that in response of races 134E182A+ dominant variance was more important than additive variance. Cultivar Tajan had the most GCA among other parents for resistance increase. The results of the experiment further showed dominant effects for most alleles. Significant correlation was observed among traits for each race. Broad sense heritabilitie for 134E182A+ were 97.1 percent while narrow sense heritabilitie were 70.4 percent.
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