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Publication Details
AFRICAN RESEARCH NEXUS
SHINING A SPOTLIGHT ON AFRICAN RESEARCH
agricultural and biological sciences
Putative origin of clonal lineages of Amylostereum areolatum, the fungal symbiont associated with Sirex noctilio, retrieved from Pinus sylvestris, in eastern Canada
Fungal Biology, Volume 115, No. 8, Year 2011
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Description
The Eurasian Sirex noctilio-Amylostereum areolatum complex was discovered and has become established close to the North American Great Lakes in the 2000s. This invasive forest insect pest represents a very high risk to native and exotic pines in North America. We investigated the geographical origin of clonal lineages of the fungal symbiont A. areolatum in the recently pest-colonized eastern Canadian region by analyzing mitochondrial and nuclear sequence variations and comparing the genetic diversity of a worldwide collection of fungal symbionts among six countries where the Sirex complex is native and four countries from which the insect-fungal complex has been introduced. In total, 102 isolates were analyzed. While 12 multilocus genotypes (MLGs) are observed in the areas where S. noctilio is native, only two MLGs are retrieved from areas where S. noctilio is not native, indicating the wide spread of clonal lineages in the introduced fungal symbiont of S. noctilio. MLG2 comprises 26. % of the Canadian isolates and is also observed in Chile and South Africa, where the insect-fungal complex has also been introduced. MLG3 comprises 74. % of the Canadian isolates and is also observed in the USA, but nowhere else in our worldwide collection. Thus, at least one of the Canadian clonal lineages shares a common origin with A. areolatum isolates from the Southern Hemisphere. The source of the second clonal lineage is still unknown, but phylogenetic analyses show that MLG3 is isolated. More extended sampling is necessary to determine the origin of this fungal clonal lineage and investigate its probable symbiotic association with native North American Sirex. © 2011.
Authors & Co-Authors
Bergeron, Marie Josée
Canada, Ottawa
Canadian Forest Service
Leal, Isabel
Canada, Victoria
Pacific Forestry Centre
Foord, Brett
Canada, Victoria
Pacific Forestry Centre
Ross, Grace
Canada, Victoria
Pacific Forestry Centre
Davis, C.
Canada, Sault Ste Marie
Great Lakes Forestry Centre
Slippers, Bernard
South Africa, Pretoria
University of Pretoria
De Groot, Peter
Canada, Sault Ste Marie
Great Lakes Forestry Centre
Hamelin, Richard C.
Canada, Ottawa
Canadian Forest Service
Statistics
Citations: 30
Authors: 8
Affiliations: 4
Identifiers
Doi:
10.1016/j.funbio.2011.05.009
ISSN:
18786146
Research Areas
Cancer
Genetics And Genomics
Study Locations
South Africa