title: Multilocus sequence analysis of Fusarium pseudograminearum reveals a single phylogenetic species.
abstract: Fusarium pseudograminearum causes crown rot of wheat in Australia and most other wheat growing regions, but its evolutionary history is largely unknown. We demonstrate for the first time that F. pseudograminearum is a single phylogenetic species without consistent lineage development across genes. Isolates of F. pseudograminearum, F. graminearum sensu lato, and F. cerealis, were collected from four countries and four single copy, nuclear genes were partially sequenced, aligned with previously published sequences of these and related species, and analysed by maximum parsimony and Bayesian inference. Evolutionary divergence varied between genes, with high phylogenetic incongruence occurring between the gene genealogies. The absence of geographic differentiation between isolates indicates that the introduction of new fungal strains to a region has the potential to introduce new pathogenic and toxigenic genes into the native population through sexual recombination.
authors.affiliation: CSIRO Plant Industry, 306 Carmody Road, St Lucia, Queensland 4067, Australia. jason.b.scott@csiro.au
authors.forename: Jason B
authors.initials: JB
authors.lastname: Scott
authors.forename: Sukumar
authors.initials: S
authors.lastname: Chakraborty
mesh_terms: D001483:Base Sequence; D001499:Bayes Theorem; D004271:DNA, Fungal / Q000737:chemistry / Q000235:genetics; D021901:DNA, Intergenic / Q000737:chemistry / Q000235:genetics; D019143:Evolution, Molecular; D005670:Fusarium / Q000145:classification / Q000235:genetics* / Q000302:isolation & purification; D014644:Genetic Variation; D008969:Molecular Sequence Data; D009517:New South Wales; D020648:Peptide Elongation Factor 1 / Q000737:chemistry / Q000235:genetics; D028061:Phosphate Transport Proteins / Q000737:chemistry / Q000235:genetics; D010802:Phylogeny; D010935:Plant Diseases / Q000382:microbiology*; D016133:Polymerase Chain Reaction; D011793:Queensland; D016415:Sequence Alignment; D017422:Sequence Analysis, DNA; D014908:Triticum; D014404:Tubulin / Q000737:chemistry / Q000235:genetics
chemical_list: D004271:DNA, Fungal; D021901:DNA, Intergenic; D020648:Peptide Elongation Factor 1; D028061:Phosphate Transport Proteins; D014404:Tubulin; C055831:phosphate permease