Journal
MYCOLOGICAL RESEARCH
Volume 104, Issue -, Pages 281-285Publisher
CAMBRIDGE UNIV PRESS
DOI: 10.1017/S0953756299001355
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We have designed primers for identification of the economically important plant pathogenic Rhizoctonia solani, for AG 2 and for each subgroup and an ecological type of AG 2. These specific primers have been designed based on specific sequences of the ITS regions in the R. solani species complex. The PCR procedure involves amplification of the 5.8S ribosomal DNA and part of the ITS regions, using the designed primers in combination with the general fungal primers ITS1F and ITS4B. Two of the primers amplify under optimal PCR conditions R. solani AG 1, AG 2, AG 3, AG 4, AG 5 and binucleate Rhizoctonia (BNR), and six more primers amplify specifically R. solani AG 2, the subgroups, AG 2-1, AG 2-2 and AG 2-3, and the ecological type AG 2-t. In this study DNAs from R. solani AG 2 and AG 4 growing on infected radish were amplified similarly to DNAs from axenic cultures. PCR detection has time saving advantages over traditional isolation methods for detection of Rhizoctonia on infected plant tissue and provides a powerful tool of identification.
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