Title: Characterization of North American Armillaria species: Genetic relationships determined by ribosomal DNA sequences and AFLP markers
Author: Kim, M. -S.; Klopfenstein, N. B.; Hanna, J. W.; McDonald, G. I.
Source: Forest Pathology. 36: 145-164.
Publication Series: Journal/Magazine Article (JRNL)
Description: Phylogenetic and genetic relationships among 10 North American Armillaria species were analysed using sequence data from ribosomal DNA (rDNA), including intergenic spacer (IGS-1), internal transcribed spacers with associated 5.8S (ITS + 5.8S), and nuclear large subunit rDNA (nLSU), and amplified fragment length polymorphism (AFLP) markers. Based on rDNA sequence data, the nLSU region is less variable among Armillaria species than the ITS + 5.8S and IGS-1 regions (nLSU < ITS + 5.8S < IGS-1). Phylogenetic analyses of the rDNA sequences suggested Armillaria mellea, A. tabescens and A. nabsnona are well separated from the remaining Armillaria species (A. ostoyae, A. gemina, A. calvescens, A. sinapina, A. gallica, NABS X and A. cepistipes). Several Armillaria species (A. calvescens, A. sinapina, A. gallica, NABS X and A. cepistipes) clustered together based on rDNA sequencing data. Based on the isolates used in this study, it appears that techniques based on IGS-1, ITS + 5.8S, and/or D-domain/3' ends of nLSU are not reliable for distinguishing A. calvescens, A. sinapina, A. gallica and A. cepistipes. However, AFLP data provided delineation among these species, and AFLP analysis supported taxonomic classification established by conventional methods (morphology and interfertility tests). Our results indicate that AFLP genetic markers offer potential for distinguishing currently recognized North American Biological Species (NABS) of Armillaria in future biological, ecological and taxonomic studies.
Keywords: Armillaria, ribosomal DNA (rDNA), AFLP markers
- 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.
XML: View XML
Kim, M. -S.; Klopfenstein, N. B.; Hanna, J. W.; McDonald, G. I. 2006. Characterization of North American Armillaria species: Genetic relationships determined by ribosomal DNA sequences and AFLP markers. Forest Pathology. 36: 145-164.
Get the latest version of the Adobe Acrobat reader or Acrobat Reader for Windows with Search and Accessibility