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Phylogenetic relationships of cyphelloid homobasidiomycetes.
Mol Phylogenet Evol. 2004 Nov; 33(2):501-15.MP

Abstract

The homobasidiomycetes includes the mushroom-forming fungi. Members of the homobasidiomycetes produce the largest, most complex fruiting bodies in the fungi, such as gilled mushrooms ("agarics"), boletes, polypores, and puffballs. The homobasidiomycetes also includes species that produce minute, cup- or tube-shaped "cyphelloid" fruiting bodies, that rarely exceed 1-2 mm diameter. The goal of this study was to estimate the phylogenetic placements of cyphelloid fungi within the homobasidiomycetes. Sequences from the nuclear large subunit (nuc-lsu) ribosomal DNA (rDNA), 5.8S rDNA, and internal transcribed spacers (ITS) 1 and 2 were obtained for 31 samples of cyphelloid fungi and 16 samples of other homobasidiomycetes, and combined with published sequences. In total, 71 sequences of cyphelloid fungi were included, representing 16 genera. Preliminary phylogenetic analyses of a 1477-sequence data set and BLAST searches using sequences of cyphelloid forms as queries were used to identify taxa that could be close relatives of cyphelloid forms. Subsequent phylogenetic analyses of one data set with 209 samples represented by nuc-lsu rDNA sequences (analyzed with parsimony) and another with 38 samples represented by nuc-lsu and 5.8S rDNA sequences (analyzed with parsimony and maximum likelihood) indicated that cyphelloid forms represent a polyphyletic assemblage of reduced agarics (euagarics clade, Agaricales). Unconstrained tree topologies suggest that there have been about 10-12 origins of cyphelloid forms, but evaluation of constrained topologies with the Shimodaira-Hasegawa test suggests that somewhat more parsimonious scenarios cannot be rejected. Whatever their number, the multiple independent origins of cyphelloid forms represent striking cases of parallel evolutionary reduction of complex fungal morphology.

Authors+Show Affiliations

Department Biology I and GeoBio-Center, Biodiversity Research: Systematic Mycology, Ludwig-Maximilians-University Munich, 67 Menzinger St., Munich D-80638, Germany.No affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info available

Pub Type(s)

Journal Article
Research Support, U.S. Gov't, Non-P.H.S.

Language

eng

PubMed ID

15336682

Citation

Bodensteiner, Philomena, et al. "Phylogenetic Relationships of Cyphelloid Homobasidiomycetes." Molecular Phylogenetics and Evolution, vol. 33, no. 2, 2004, pp. 501-15.
Bodensteiner P, Binder M, Moncalvo JM, et al. Phylogenetic relationships of cyphelloid homobasidiomycetes. Mol Phylogenet Evol. 2004;33(2):501-15.
Bodensteiner, P., Binder, M., Moncalvo, J. M., Agerer, R., & S Hibbett, D. (2004). Phylogenetic relationships of cyphelloid homobasidiomycetes. Molecular Phylogenetics and Evolution, 33(2), 501-15.
Bodensteiner P, et al. Phylogenetic Relationships of Cyphelloid Homobasidiomycetes. Mol Phylogenet Evol. 2004;33(2):501-15. PubMed PMID: 15336682.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Phylogenetic relationships of cyphelloid homobasidiomycetes. AU - Bodensteiner,Philomena, AU - Binder,Manfred, AU - Moncalvo,Jean-Marc, AU - Agerer,Reinhard, AU - S Hibbett,David, PY - 2004/04/09/received PY - 2004/06/11/revised PY - 2004/9/1/pubmed PY - 2005/3/11/medline PY - 2004/9/1/entrez SP - 501 EP - 15 JF - Molecular phylogenetics and evolution JO - Mol Phylogenet Evol VL - 33 IS - 2 N2 - The homobasidiomycetes includes the mushroom-forming fungi. Members of the homobasidiomycetes produce the largest, most complex fruiting bodies in the fungi, such as gilled mushrooms ("agarics"), boletes, polypores, and puffballs. The homobasidiomycetes also includes species that produce minute, cup- or tube-shaped "cyphelloid" fruiting bodies, that rarely exceed 1-2 mm diameter. The goal of this study was to estimate the phylogenetic placements of cyphelloid fungi within the homobasidiomycetes. Sequences from the nuclear large subunit (nuc-lsu) ribosomal DNA (rDNA), 5.8S rDNA, and internal transcribed spacers (ITS) 1 and 2 were obtained for 31 samples of cyphelloid fungi and 16 samples of other homobasidiomycetes, and combined with published sequences. In total, 71 sequences of cyphelloid fungi were included, representing 16 genera. Preliminary phylogenetic analyses of a 1477-sequence data set and BLAST searches using sequences of cyphelloid forms as queries were used to identify taxa that could be close relatives of cyphelloid forms. Subsequent phylogenetic analyses of one data set with 209 samples represented by nuc-lsu rDNA sequences (analyzed with parsimony) and another with 38 samples represented by nuc-lsu and 5.8S rDNA sequences (analyzed with parsimony and maximum likelihood) indicated that cyphelloid forms represent a polyphyletic assemblage of reduced agarics (euagarics clade, Agaricales). Unconstrained tree topologies suggest that there have been about 10-12 origins of cyphelloid forms, but evaluation of constrained topologies with the Shimodaira-Hasegawa test suggests that somewhat more parsimonious scenarios cannot be rejected. Whatever their number, the multiple independent origins of cyphelloid forms represent striking cases of parallel evolutionary reduction of complex fungal morphology. SN - 1055-7903 UR - https://www.unboundmedicine.com/medline/citation/15336682/Phylogenetic_relationships_of_cyphelloid_homobasidiomycetes_ L2 - https://linkinghub.elsevier.com/retrieve/pii/S1055-7903(04)00197-6 DB - PRIME DP - Unbound Medicine ER -