Skip to Main Content
The European S and F intersterility groups of Heterobasidion annosum may represent sympatric protospeciesAuthor(s): Matteo Garbelotto; William J. Otrosina; Fields W. Cobb; Thomas D Bruns
Source: Canadian Journal of Botany.76: 397-409.
Publication Series: Miscellaneous Publication
PDF: Download Publication (409 KB)
DescriptionIn those regions of Europe where they coexist, the F and S intersterility groups (ISGs) of Heterobasidion annosum (Fr.) Bref. are primarily found on Abies spp. and Picea abies (L.) Karst., respectively. Eighty-three isolates of H. annosum were collected from Abies alba Mill. from 19 sites in Italy, including 10 Abies-Picea mixed conifer stands in the eastern Alps. The ISGs of a subsample of 34 isolates were determined by ISG-diagnostic arbitrary-primed (AP) PCR primers. For a subsample of 16 isolates, including two S isolates from Norway and one S isolate from California, nuclear markers generated by AP-PCR analysis, and mitochondrial markers generated by restriction fragment length polymorphisms and sequencing of the ML5-ML6 region of the mitochondrial large ribosomal RNA gene indicated that, in Europe, (i) the F and S ISGs can be found in the same forest stand but they are two genetically distinct units with restricted gene flow between them; (ii) each of the two ISGs is monophyletic and may lack strong genetic substructuring in subpopulations; and (iii) the two ISGs are closely related to each other and their nearest common close relative is the allopatric S ISG from North America. By combining these results with paleobotanical information and results from previous studies, the authors postulate a recent sympatric divergence of these two groups driven by differential host specificity and mating barriers.
- You may send email to firstname.lastname@example.org to request a hard copy of this publication.
- (Please specify exactly which publication you are requesting and your mailing address.)
- We recommend that you also print this page and attach it to the printout of the article, to retain the full citation information.
- This article was written and prepared by U.S. Government employees on official time, and is therefore in the public domain.
CitationGarbelotto, Matteo; Otrosina, William J.; Cobb, Fields W.; Bruns, Thomas D. 1998. The European S and F intersterility groups of Heterobasidion annosum may represent sympatric protospecies. Canadian Journal of Botany.76: 397-409.
- Habitat preference and the evolution of sympatric intersterility groups in the Heterbasidion annosum species complex
- Preliminary results on the genetic structure of Heterobasidion annosum white fir (Abies concolor) root decay centers
- Use of taxon-specific competitive-priming PCR to study host specificity, hybridization, and intergroup gene flow in intersterility groups of Heterobasidion annosum
XML: View XML