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The nucleotide sequences of the internal transcribed spacer (ITS) regions of the ribosomal DNA including the 5.8S rRNA gene and the 5’ end of the 28S rRNA gene have been determined for 19 species in 10 genera of the powdery mildew fungi in order to analyze their phylogenetic relationship. These fungi were divided into two large groups based on the nucleotide length of the ITS regions, and this grouping...
An improved protocol, including DNA extraction with Chelex, two amplifications with a nested primer set, and DNA purification by electrophoresis, made it possible to analyze nuclear rDNA sequences of powdery mildew fungi using at most several hundred conidia or 20 cleistothecia. Nucleotide sequence diversity of the nuclear rDNA region containing the two internal transcribed spacers (ITS1 and ITS2)...
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