Avtor/Urednik		Matheny, P Brandon; Gossmann, Jasmin A; Zalar, Polona; Kumar, TK Arun; Hibbett, David S
Naslov		Resolving the phylogenetic position of the Wallemiomycetes: an enigmatic major lineage of Basidiomycota
Tip		članek
Vir		Can J Bot
Vol. in št.		Letnik 84
Leto izdaje		2006
Obseg		str. 1794-805
Jezik		eng
Abstrakt		The Wallemiomycetes includes three species of molds from the genus Wultemia. These fungi are adapted to environments of high osmotic stress, contaminate various foods, cause respiratory disease, and have an unusual mode of asexual reproduction. Wallemia was recently proposed as a new class based on 18S ribosomal RNA gene sequences to accommodace the isolated position of the clade in the Basidiomycota. We analyzed the phylogenetic position of the Wallemiomycetes using 3451 nucleotide characters of the 18S, 25S, and 5.8S ribosomal RNA genes and 1282 amino acid positions of rpb1, rpb2, and tef1 nuclear protein-coding genes across 91 taxa. Different gene regions and methods of phylogenetic inference produce mildly conflicting placements of the Wallemiomycetes. Parsimony analyses of nrDNA data suggest that the Wallemiomycetes is an early diverging lineage of Basidiomycota, occupying a basal position near the Encorrhizomycetidae. Ultrastructural data some Bayesian analyses, and amino acid sequences suggest the Wallemiomycetes may be the sister group of the Agaricomyeotina or Ustilaginomycotina. The combined gene tree supports the Wallemiomycetes as a lineage basal to a core clade of Pucciniomycotina. Ustilaginomycotina, and Agacicomycotina with robust measures of branch support. This study reinforces the isolated posuion of Wallemice in she Basidiomycota using molecular data from six nuclear genes. In local, five major Lineages of Basidiomycota are recognized: the Agaricomycotina, Ustilaginomycocina, Pucciniomycotina, Entorrhizomycetidae, and she Wallemiomycetes.
Deskriptorji		BASIDIOMYCETES PHYLOGENY PEPTIDE ELONGATION FACTORS GENES, FUNGAL INTRONS POLYMERASE CHAIN REACTION RNA, RIBOSOMAL, 18S RNA, RIBOSOMAL, 5.8S