Detection of Gaeumannomyces graminis Varieties Using Polymerase Chain Reaction with Variety-Specific Primers

The polymerase chain reaction (PCR) was used for detection of Gaeumannomyces graminis, the causal agent of take-all disease in wheat, oats, and turfgrass. NS5 and NS6 universal primers amplified the middle region of 18S ribosomal DNA of Gaeumannomyces species and varieties. Primers GGT-RP (5' T...

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Veröffentlicht in:Plant disease. - 1997. - 84(2000), 9 vom: 31. Sept., Seite 947-951
1. Verfasser: Fouly, H M (VerfasserIn)
Weitere Verfasser: Wilkinson, H T
Format: Online-Aufsatz
Sprache:English
Veröffentlicht: 2000
Zugriff auf das übergeordnete Werk:Plant disease
Schlagworte:Journal Article
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520 |a The polymerase chain reaction (PCR) was used for detection of Gaeumannomyces graminis, the causal agent of take-all disease in wheat, oats, and turfgrass. NS5 and NS6 universal primers amplified the middle region of 18S ribosomal DNA of Gaeumannomyces species and varieties. Primers GGT-RP (5' TGCAATGGCTTCGTGAA 3') and GGA-RP (5' TTTGTGTGTGAC CATAC 3') were developed by sequence analysis of cloned NS5-NS6 fragments. The primer pair NS5:GGT-RP amplified a single 410-bp fragment from isolates of G. graminis var. tritici, a single 300-bp fragment from isolates of G. graminis var. avenae, and no amplification products from isolates of G. graminis var. graminis or other species of Gaeumannomyces. The primer pair NS5:GGA-RP amplified a single 400-bp fragment from isolates of varieties tritici and avenae. Two sets of primer pairs (NS5:GGT-RP and NS5:GGA-RP) were used in PCR reactions to detect and identify the varieties tritici and avenae either colonizing wheat, oats, or grass roots, or in culture. No amplification products were observed using DNA extracted from plants infected with eight other soilborne fungal pathogens or from uninoculated plants 
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