title: An overview of the higher level classification of Pucciniomycotina based on combined analyses of nuclear large and small subunit rDNA sequences.
abstract: In this study we provide a phylogenetically based introduction to the classes and orders of Pucciniomycotina (= Urediniomycetes), one of three subphyla of Basidiomycota. More than 8000 species of Pucciniomycotina have been described including putative saprotrophs and parasites of plants, animals and fungi. The overwhelming majority of these (approximately 90%) belong to a single order of obligate plant pathogens, the Pucciniales (= Uredinales), or rust fungi. We have assembled a dataset of previously published and newly generated sequence data from two nuclear rDNA genes (large subunit and small subunit) including exemplars from all known major groups in order to test hypotheses about evolutionary relationships among the Pucciniomycotina. The utility of combining nuc-lsu sequences spanning the entire D1-D3 region with complete nuc-ssu sequences for resolution and support of nodes is discussed. Our study confirms Pucciniomycotina as a monophyletic group of Basidiomycota. In total our results support eight major clades ranked as classes (Agaricostilbomycetes, Atractiellomycetes, Classiculomycetes, Cryptomycocolacomycetes, Cystobasidiomycetes, Microbotryomycetes, Mixiomycetes and Pucciniomycetes) and 18 orders.
authors.affiliation: USDA-ARS, Systematic Botany and Mycology Lab, Beltsville, Maryland 20705, USA. cathie@nt.ars-grin.gov
authors.forename: M Catherine
authors.initials: MC
authors.lastname: Aime
authors.forename: P Brandon
authors.initials: PB
authors.lastname: Matheny
authors.forename: Daniel A
authors.initials: DA
authors.lastname: Henk
authors.forename: Elizabeth M
authors.initials: EM
authors.lastname: Frieders
authors.forename: R Henrik
authors.initials: RH
authors.lastname: Nilsson
authors.forename: Meike
authors.initials: M
authors.lastname: Piepenbring
authors.forename: David J
authors.initials: DJ
authors.lastname: McLaughlin
authors.forename: Les J
authors.initials: LJ
authors.lastname: Szabo
authors.forename: Dominik
authors.initials: D
authors.lastname: Begerow
authors.forename: José Paulo
authors.initials: JP
authors.lastname: Sampaio
authors.forename: Robert
authors.initials: R
authors.lastname: Bauer
authors.forename: Michael
authors.initials: M
authors.lastname: Weiss
authors.forename: Franz
authors.initials: F
authors.lastname: Oberwinkler
authors.forename: David
authors.initials: D
authors.lastname: Hibbett
mesh_terms: D001487:Basidiomycota / Q000145:classification* / Q000166:cytology / Q000235:genetics / Q000254:growth & development; D004271:DNA, Fungal / Q000737:chemistry / Q000235:genetics*; D004275:DNA, Ribosomal / Q000737:chemistry / Q000235:genetics*; D008969:Molecular Sequence Data; D010802:Phylogeny; D012337:RNA, Ribosomal, 18S / Q000235:genetics*; D012339:RNA, Ribosomal, 28S / Q000235:genetics*; D017422:Sequence Analysis, DNA
chemical_list: D004271:DNA, Fungal; D004275:DNA, Ribosomal; D012337:RNA, Ribosomal, 18S; D012339:RNA, Ribosomal, 28S