Effect of non-hypersensitive resistant wheat genotypes on early ab•.rtlon and size of colonies of leaf rust (Puccinia triticina) and cultivar x isolate interaction was studied on twenty-six spring wheat cultivars/lines and two P. triticina isolates. All the cultivars/lines displayed compatible infection types. No significant interaction was observed between host genotypes and pathogen isolates for percentage of early aborted infection units without plant cell necrosis while cultivar x isolate interaction was significant for colony diameter of infection units. However, the interaction for colony diameter was inconsistent and was not reproducible. Host genotypes varied for all the parameters studied. In hypersensitive resistant genotypes the fungus showed a long latency period, an increase In percentage of early aborted infection units without plant cell necrosis and reduced colony diameter than on highly susceptible genotypes. Key words: Wheat, Triticum aestivum, wheat leaf rust, Puccinia triticina
Maqsood Qamar, Rient, E. Niks, Doulat Baig. (2003) EFFECT OF NON-HYPERSENSITIVE RESISTANT WHEAT GENOTYPES ON EARLY ABORTION AND COLONY SIZE OF LEAF RUST PUCCINIA TRITICINA, , Volume 40, Issue 3,4.
