title: Clonal diversity and population genetic structure of arbuscular mycorrhizal fungi (Glomus spp.) studied by multilocus genotyping of single spores.
abstract: A nested multiplex PCR (polymerase chain reaction) approach was used for multilocus genotyping of arbuscular mycorrhizal fungal populations. This method allowed us to amplify multiple loci from Glomus single spores in a single PCR amplification. Variable introns in the two protein coding genes GmFOX2 and GmTOR2 were applied as codominant genetic markers together with the LSU rDNA. Genetic structure of Glomus spp. populations from an organically and a conventionally cultured field were compared by hierarchical sampling of spores from four plots in each field. Multilocus genotypes were characterized by SSCP (single stranded conformation polymorphism) and sequencing. All spore genotypes were unique suggesting that no recombination was taking place in the populations. There were no overall differences in the distribution of genotypes in the two fields and identical genotypes could be sampled from both fields. Analysis of gene diversity indicated that Glomus populations are subdivided between plots within each field. There were however, no subdivision between the fields.
authors.affiliation: Institute of Biology, Department of Microbiology, University of Copenhagen, Oester Farimagsgade 2D, DK-1353 Copenhagen K, Denmark. eva.stukenbrock@ipw.agrl.ethz.ch
authors.forename: Eva H
authors.initials: EH
authors.lastname: Stukenbrock
authors.forename: Søren
authors.initials: S
authors.lastname: Rosendahl
mesh_terms: D001483:Base Sequence; D018797:Cell Cycle Proteins / Q000235:genetics; D004275:DNA, Ribosomal / Q000235:genetics; D003718:Denmark; D005656:Fungal Proteins / Q000235:genetics; D005658:Fungi / Q000235:genetics*; D014644:Genetic Variation; D005828:Genetics, Population; D005838:Genotype; D008969:Molecular Sequence Data; D038821:Mycorrhizae / Q000235:genetics*; D019869:Phosphatidylinositol 3-Kinases / Q000235:genetics; D016133:Polymerase Chain Reaction / Q000379:methods; D018807:Polymorphism, Single-Stranded Conformational; D017422:Sequence Analysis, DNA; D013172:Spores, Fungal / Q000235:genetics*
chemical_list: D018797:Cell Cycle Proteins; D004275:DNA, Ribosomal; C400127:FOX2 protein, Glomus mosseae; D005656:Fungal Proteins; D019869:Phosphatidylinositol 3-Kinases