New insights into classification and evolution of the Lecanoromycetes (Pezizomycotina, Ascomycota) from phylogenetic analyses of three ribosomal RNA- and two protein-coding genes
| Autor: | Valérie Reeb, Irwin M. Brodo, Martin Grube, Martin Kukwa, Burkhard Büdel, Frank Kauff, Cécile Gueidan, Einar Timdal, Valérie Hofstetter, Mónica A.G. Otálora, James C. Lendemer, Paul Diederich, Conrad L. Schoch, Gary B. Perlmutter, A. Elizabeth Arnold, Rebecca Yahr, Philip F. May, Jolanta Miadlikowska, Erin A. Tripp, Josef Hafellner, François Lutzoni, Damien Ertz, Alexandra Rauhut, Brendan P. Hodkinson, Soili Stenroos, Connie Robertson, Emily Fraker, Robert Lücking, Geir Hestmark, Christoph Scheidegger |
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| Rok vydání: | 2007 |
| Předmět: |
0106 biological sciences
0301 basic medicine Physiology Sequence Homology 010603 evolutionary biology 01 natural sciences DNA Mitochondrial DNA Ribosomal Evolution Molecular 03 medical and health sciences Ascomycota Phylogenetics RNA Ribosomal 28S Genetics RNA Ribosomal 18S Cluster Analysis DNA Fungal Gene Molecular Biology Ecology Evolution Behavior and Systematics Phylogeny Lecanoromycetes biology Phylogenetic tree Computational Biology Cell Biology General Medicine Ribosomal RNA 030108 mycology & parasitology biology.organism_classification Phenotype Evolutionary biology RNA Polymerase II human activities Pezizomycotina |
| Zdroj: | University of Helsinki |
| ISSN: | 0027-5514 |
| Popis: | The Lecanoromycetes includes most of the lichen-forming fungal species (13500) and is therefore one of the most diverse class of all Fungi in terms of phenotypic complexity. We report phylogenetic relationships within the Lecanoromycetes resulting from Bayesian and maximum likelihood analyses with complementary posterior probabilities and bootstrap support values based on three combined multilocus datasets using a supermatrix approach. Nine of 10 orders and 43 of 64 families currently recognized in Eriksson's classification of the Lecanoromycetes (Outline of Ascomycota--2006 Myconet 12:1-82) were represented in this sampling. Our analyses strongly support the Acarosporomycetidae and Ostropomycetidae as monophyletic, whereas the delimitation of the largest subclass, the Lecanoromycetidae, remains uncertain. Independent of future delimitation of the Lecanoromycetidae, the Rhizocarpaceae and Umbilicariaceae should be elevated to the ordinal level. This study shows that recent classifications include several nonmonophyletic taxa at different ranks that need to be recircumscribed. Our phylogenies confirm that ascus morphology cannot be applied consistently to shape the classification of lichen-forming fungi. The increasing amount of missing data associated with the progressive addition of taxa resulted in some cases in the expected loss of support, but we also observed an improvement in statistical support for many internodes. We conclude that a phylogenetic synthesis for a chosen taxonomic group should include a comprehensive assessment of phylogenetic confidence based on multiple estimates using different methods and on a progressive taxon sampling with an increasing number of taxa, even if it involves an increasing amount of missing data. |
| Databáze: | OpenAIRE |
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