Reactions 13 wheat cultivars to 18 Mycosphaerella graminicola isolates, collected from three distinct localities, were in average different but differences among individual cultivars were small. All cultivars were sus...Reactions 13 wheat cultivars to 18 Mycosphaerella graminicola isolates, collected from three distinct localities, were in average different but differences among individual cultivars were small. All cultivars were susceptible to septoria tritici blotch. Reactions of wheat cultivars to M. graminicola isolates varied from 31% to 41%. Some cultivars had low differences but the other high in reactions to used isolates in average. Variance of individual cultivars to all isolates in reactions of maximal and minimal values fluctuated between 44-80%. More differences were in reactions between individual isolates to single cultivars. Aggressiveness individual isolates to all tested cultivars oscillated in average from 9% to 66% of necrotic leaf area covered by pycnidia. Three isolates had very low, whereas five isolates had high aggressiveness in average to all cultivars. Difference in maximal and minimal aggressiveness of individual isolates to all cultivars was between 13 and 60%. Avirulent reaction was ascertained in the cultivar Rexia to one isolate. Isolates showed wide differences in colored and morphological characteristics. Dissimilarity and similarity was in border shape, cultivation types, surface and coloration of isolate colony also.展开更多
文摘Reactions 13 wheat cultivars to 18 Mycosphaerella graminicola isolates, collected from three distinct localities, were in average different but differences among individual cultivars were small. All cultivars were susceptible to septoria tritici blotch. Reactions of wheat cultivars to M. graminicola isolates varied from 31% to 41%. Some cultivars had low differences but the other high in reactions to used isolates in average. Variance of individual cultivars to all isolates in reactions of maximal and minimal values fluctuated between 44-80%. More differences were in reactions between individual isolates to single cultivars. Aggressiveness individual isolates to all tested cultivars oscillated in average from 9% to 66% of necrotic leaf area covered by pycnidia. Three isolates had very low, whereas five isolates had high aggressiveness in average to all cultivars. Difference in maximal and minimal aggressiveness of individual isolates to all cultivars was between 13 and 60%. Avirulent reaction was ascertained in the cultivar Rexia to one isolate. Isolates showed wide differences in colored and morphological characteristics. Dissimilarity and similarity was in border shape, cultivation types, surface and coloration of isolate colony also.
