Document Type : Pest Management
Authors
Abstract
In order to evaluate gene effect, gene number and heritability for resistance to powdery mildew in barley, two cultivars were crossed with susceptible one. P1, P2, F1, F2 and F3 generation Hebe × Arigashar and Igri × Arigashar were planted in a randomized complete block design with three replications. At six different dates, disease severity was recorded for individual plant at three days intervals, starting before boot swollen. The area under the disease progress curve (AUDPC) was calculated and weighted analysis was used for the generation mean analysis. Resistance in the two adualt resistant genotype was dominant. The join scaling test indicated that the inheritance of powdery mildew was described by the additive-dominance components and epistasis, mainly additive×additive. Estimates of heritability for two cross was 74% and 84% and number of gene governing resistance ranged from 11-13 to 1 for two crossed mentioned above.
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