Abstract
Bacterial soft rot caused by Erwiniacarotovora subsp. carotovora is amajor disease in Zantedeschia spp.,particularly in cultivars from the sectionAestivae. The disease can partiallybe controlled by cultivation measures, so acombination with resistant cultivars couldeffectively protect the crop. However,resistant commercial Aestivaecultivars are not available yet. By meansof a recently developed non-destructiveresistance test, variation inaggressiveness was observed among fiveisolates of Erwinia carotovora subsp.carotovora without interactionsbetween the isolates and three Zantedeschia accessions. Within elevenaccessions of Z. aethiopica,variation was observed from almost completeto moderate resistance, while theZ. odorata accession was susceptible.All 21 Aestivae cultivars weresusceptible. Within the Aestivaespecies, Z. elliotiana and Z.pentlandii were also susceptible, butwithin twelve accessions of Z.albomaculata, as well as in six accessionsof Z. rehmannii, variation was foundfrom susceptible to moderately resistant.Hence, new sources of resistance wereidentified that show good potentials forresistance breeding.
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Snijder, R.C., Cho, HR., Hendriks, M.M. et al. Genetic variation in Zantedeschia spp. (Araceae) for resistance to soft rot caused by Erwinia carotovora subsp. carotovora . Euphytica 135, 119–128 (2004). https://doi.org/10.1023/B:EUPH.0000009546.88984.60
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DOI: https://doi.org/10.1023/B:EUPH.0000009546.88984.60