The reaction of barley genotypes to isolates of Rhynchosporium secalis (Oud.) Davis
1999
Vanco, B. | Janosova, M. | Palkova, M.
Under greenhouse condition in period of 1996 to 1998 the isolates of Rhynchosporium secalis (Oud.) Davis, originally from different areas of Slovakia were studied to determine the pathogenic variability at 28 genotypes of barley. In field condition under natural infection pressure of the pathogen, the field resistance of the same genotypes has been examined against Rhynchosporium secalis. The results have shown that ditferences in pathogenity of 24 Rhynchosporium secalis isolates of different areas of Slovakia were statistically highly significant. Under greenhouse and field condition, significant differences have been found out in infection level (resistance) among the varieties. There have been found out acceptable correlations in infection degree of the genotypes among different ¡solates within greenhouse test, in field resistance of genotypes among years and between greenhouse and field tests under natural infection pressure of the pathogen. Genotypes of the Ethiopian origin CI. 9820, CI. 9825, CI. 9768 and K 20019 from VIZR have been arranged to the genotypes of the most stable resistance. Tifang (CI.4407, Manchurian), Lenka (Germany) and Viktor (Czech Republic) genotypes have been part of the most susceptible ones
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