Canadian Forest Service Publications

Phylogenetic analyses of North American populations of Heterobasidion irregulare and Heterobasidion occidentale/ Analyse phylogénétique des populations nord-américaines de l’Heterobasidion irregulare et de l’Heterobasidion occidentale. 2012. Shamoun, S.F.; Li, X.; Nie, J.; Hammill, D.L.; Sumampong, G.; De Boer, S.H. Pages 150-151 in Proceedings of the Forest Pest Management Forum 2011/Compte rendu du Forum sur la répression des ravageurs forestiers 2011, December 6-8, 2011, Ottawa Convention Centre, Ottawa, ON. Natural Resources Canada, Canadian Forest Service, Ottawa, Ontario.

Year: 2012

Issued by: Pacific Forestry Centre

Catalog ID: 34160

Language: English / French

Availability: PDF (download)

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Heterobasidion annosum (Fr.) Bref. sensu lato causes one of the most destructive diseases of conifers. Heterobasidion is a species complex consisting of 5 species. The North American intersterility groups (ISG), H. irregulare (P) and H_ occidentale (S), were recently named. The other 3 spp., H. annosum sensu stricto (s.s.)- (P), H. parviporum (S) and H. abietinum (F), are European. Development of molecular diagnostics for detection and identification of Heterobasidion spp. in wood products for international trade is needed by CFIA. Eight housekeeping genes were selected for genetic analysis of the 26 isolates of Heterobasidion from BC and Ontario. Phylogenetic analyses of sequences from the 26 isolates and other 226 isolates from Europe, Asia, and North America, revealed that isolates from BC resembles H. occidentale, and shares sequence homology with isolates from California and Idaho. Another 16 isolates from eastern Rocky Mountains exhibited degrees of variation, and shared a close phylogenetic with H. irregulare isolates from Quebec, Ontario, Montana, Georgia, and Alabama.