A study of the resistance of introduced accessions barley to causal agent of powdery mildew (Erysiphe graminis DC f. sp. hordei)

Nikolay Neykov, Petar Chavdarov

Abstract: During 2011 in vegetation house of IPGR – Sadovo was studied reaction of 19 accessions barley to causal agent of pow¬dery mildew – Erysiphe graminis DC f. sp. hordei from the study is established immune to the powdery mildew pathogen in second leaf stage are the accessions: 92105460, 92105503 and 96105022. The same accessions showed immune reaction in ear formation stage. Only one physiological race of the pathogen attacked the accession В1000544 with England origin. In ear formation stage the same accessions showed resistance reaction. To two physiological race of Erysiphe graminis DC f. sp. hordei resistance reaction showed barley accession А3105600. To the other races it showed susceptible reaction. In ear formation stage it is resistant. The immune accessions can be used in combined breeding for development of resistant to the powdery mildew pathogen varieties.

Keywords: barley; Erysiphe graminis f. sp. hordei; powdery mildew; resistance

Date published: 2017-01-25