GrainGenes Reference Report: PHZ-152-461
Reference
PHZ-152-461
Title
Identification of Cochliobolus sativus (spot blotch) isolates expressing differential virulence on barley genotypes in Syria
Journal
Journal of Phytopathology
Year
2004
Volume
152
Pages
461-464
Author
Arabi MIE Jawhar M
Abstract
Spot blotch, caused by Cochliobolus sativus, is a common foliar disease of barley. Information on the variability of virulence in C. sativus is essential for the production of spot-resistant barley cultivars. The virulence variability of isolates of this pathogen collected from different regions of Syria was evaluated using 10 differential barley genotypes originating from widely dispersed areas. Genotypes showed a continuous range of response from very susceptible to moderately resistant but none was immune to the disease. A cluster analysis indicated that the isolates had distinct differential virulence patterns within the three groups. A mean disease rating of 3.71 was the separation point between avirulent and virulent reactions. The data demonstrated that variation occurred in the virulence of and the resistance level to isolates and among genotypes, respectively. Isolate C41 exhibited distinct differential virulence patterns, high frequency and low variance in all genotypes. To incorporate adequate levels of resistance into future barley genotypes, disease evaluations should be made with C. sativus isolates that express the full spectrum of virulence found in Syria
Keyword
GrainGenes is a product of the Agricultural Research Service of the US Department of Agriculture.
GrainGenes Reference Report: PHZ-152-461
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GrainGenes is a product of the Agricultural Research Service of the US Department of Agriculture. | |||