Abstract
AbstractThe reaction of two barley cultivars (‘Thibaut’ and ‘Arizona’) and three lines (AECS 76,‘Tadmor’ and WI 2291) to infection by Cochliobolus sativus was evaluated by three methods. Deep seeding of inoculated seeds was performed in pots and field. Gibberellin (GA3) was applied to inoculated seeds in vitro. Susceptibility assessments were made in vitro at 2 weeks, and in pots at 7 weeks after inoculation, using a scale of 1 (very resistant) to 5 (very susceptible) according to the percentage infected area of the subcrown internodes. There were no differences between the results using the three methods.‘Arizona’ was the most susceptible, whereas ‘Thibaut’ and AECS 76 were partially resistant genotypes. The WI 2291 line and ‘Tadmor’ were moderately susceptible and moderately resistant, respectively. In vitro tests yielded the same order as tests from pot and field experiments.
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