Evaluation of Resistance to Powdery Mildew on creened Germplasm of Gene Bank Collection
2007
Shaffaedin, Sakineh | Pat Pur, Mehran | Dehqan, Mohammad A`li | Nazari, A`li | A`li Khani, Mohammad Aqa
Barley powdery mildew is one the most important diseases in Iran and many areas all over the world. Many barley germplasms were previorsly screened to he powdery mildew in the field conditions resulting in identification of several tolerant germplasms. In order to evaluate these germplasms in more detail, we have conducted experiments in two powdery mildew hot spot places, Gorgan and Karaj, by planting those germplasms each in two meter in a randomized black design with 4 replications including a suscoptibe genotype (Afzal) as well as a resistant genotype (Pmbll). Disease assesment were preformed according to Sari and Periscott method and the naturally infected fields. Moreover, several morphological and agronomical traits in cluding heading, plant height, row number in spike, maturity 1000 seed weight and yield were evaluated, our. data showed that diffemet genotypes presented different resistant levels from moderately resistant to resistant. These accessions could be categorized in two row, six row or irregular row number. Furthermore moderately to late maturity germplasms weremore resistant to powdery mildew than. The early maturity germplasms some of the germplasms were similarly resistant to the powdery mildew in both hot spots (Karaj and Gorgan) while some of them showed different reactions to powdery mildew in Karaj compared to their reactions in Gorgan.
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