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Root and butt rot of Todo fir (Abies sachalinensis) caused by Heterobasidion annosum s.l. in Hokkaido, Japan

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The occurrence and symptoms of root and butt rot were examined in a 35 × 30 m plot of 68-year-old Todo fir plantation in Hokkaido, Japan. Forty-seven percent of the cut stumps were decayed and 52% of the decayed stumps showed similar decay characteristics with yellowish orange to light brown colouration and expanded pockets in the heartwood. Morphological characteristics of the pure cultures isolated from the decay were similar to the cultures isolated from basidiocarps of Heterobasidion annosum sensu lato, found on fallen logs outside of the research site. Also DNA analysis based on the combined data set of three gene loci (glyceraldehyde 3-phosphate dehydrogenase, heat shock protein 80–1 and elongation factor 1-alpha genes) showed that the isolates from the decay are included in the same clade with the Japanese H. annosum s.l. isolates. They form a subclade to H. parviporum (the European S group of H. annosum s.l.). This is the first report of molecular determination of H. annosum s.l. isolated from root and butt rot in a plantation in Japan.
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Document Type: Research Article

Affiliations: 1: Hokkaido Forestry Research Institute, Koshunai, Bibai, Hokkaido 079-0198, Japan. ;, Email: [email protected] 2: Forestry and Forest Products Research Institute, PO Box 16, Norin Kenkyu Danchi, Tsukuba, Ibaraki 305-8687, Japan

Publication date: 2007-06-01

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