Abstract
Common bunt (Tilletia tritici) infects the wheat plant during germination of the seed. For experiments with common bunt, it is conventional to examine symptoms of infection in the head of the plant. Previous research has advocated the possibility of scoring chlorosis on the leaf instead of head symp-toms in order to reduce the duration of the experiment. By comparing the two diagnosis methods in climate chambers, the current experiment demonstrated that the sensitivity and specificity of the two methods depends on the wheat cultivar used. Using leaf symptoms as a diagnosis for infection has considerable disadvantages when used for screening for resistance in breeding programs, but have advantages, e. g., when investigating effects of seed treatments.
Zusammenfassung
Steinbrand infiziert den Weizen während der Keimung und Auflaufphase. Bei Steinbrandversuchen ist es üblich, die Symptome der Infektion in den Ähren zu untersuchen. In früheren Arbeiten wurde empfohlen, Chlorosen auf dem Blatt zu bonitieren, um die Dauer des Versuches zu reduzieren. Die hier vorgelegten Ergebnisse von vergleichenden Klimakammerversuchen zeigen, dass Empfindlichkeit und Spezifität der zwei Verfahren von der verwendeten Weizensorte abhängen. Die Infektionsdiagnose anhand der Blattsymptome ist bei Verwendung in der Resistenzzüchtung mit Nachteilen verbunden. Sie hat aber Vorteile bei z. B. Untersuchungen über die Effekte von Bekämpfungsverfahren.
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Borgen, A., Kristensen, L. Macroscopic leaf symptoms in wheat infected by Tilletia tritici. J Plant Dis Prot 110, 432–436 (2003). https://doi.org/10.1007/BF03356120
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DOI: https://doi.org/10.1007/BF03356120