Abstract
The major chestnut-growing areas in Aydın Province, which yield nearly 35% of Turkey’s production, were examined for the presence of chestnut blight and bark samples were collected from the canker formations. Generally virulent type cankers were observed. Of 31 villages, 22 were found to be contaminated with the disease. A total of 97Cryphonectria parasitica (Murrill) M.E. Barr. isolates were characterized for the presence of potential hypovirulence by looking at cultural characteristics on media and virulence in cv. ‘Golden Delicious’ apple fruit. The isolates were placed into four groups based on pigmentation and abundance of pycnidia formation. Isolates produced lesions of various sizes on apple fruits but lesion size was not correlated with cultural characteristics typical to hypovirulent isolates. Among 97 isolates, ten possessing the characteristics associated with hypovirulence were assayed for the presence of dsRNA. Among these isolates only one, coded M1-3, was found to contain dsRNA. No dsRNA was detected in the single conidium isolates derived from M1-3. All of the isolates were screened for vegetative compatibility and two European vc types, EU-1 and EU-12, were detected. This low vc-type diversity in the region may indicate a high potential for spread of transmissible hypovirulence.
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Erincik, O., Doken, M.T., Acikgoz, S. et al. Characterization ofCryphonectria parasitica isolates collected from Aydın province in Turkey. Phytoparasitica 36, 249–259 (2008). https://doi.org/10.1007/BF02980771
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DOI: https://doi.org/10.1007/BF02980771