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Phylogenetic Analysis of the Lichen Family Umbilicariaceae based on nuclear ITS1 and ITS2 rDNA Sequences

Published online by Cambridge University Press:  28 March 2007

Natalia V. Ivanova ,
Paula T. Depriest ,
Vera K. Bobrova  and
Alexey V. Troitsky
Natalia V. Ivanova
Affiliation:
Group of Automated DNA Sequencing, Engelhardt Institute of Molecular Biology, RAS, 32 Vavilova Street, Moscow, 117984, Russia. E-mail: [email protected]
Paula T. Depriest
Affiliation:
Department of Botany, NHB-166, National Museum of Natural History, Smithsonian Institution, Washington, DC 20560, USA.
Vera K. Bobrova
Affiliation:
Department of Evolutionary Biochemistry, Plant Genosystematics Laboratory, Belozersky Institute of Physico-Chemical Biology, Lomonosov State University, Vorobjovi Gori, Moscow, 117899, Russia.
Alexey V. Troitsky
Affiliation:
Department of Evolutionary Biochemistry, Plant Genosystematics Laboratory, Belozersky Institute of Physico-Chemical Biology, Lomonosov State University, Vorobjovi Gori, Moscow, 117899, Russia.
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Abstract

The lichen family Umbilicariaceae is accepted by most lichenologists as consisting of two genera, Lasallia and Umbilicaria. The monophyly of these two genera was examined by phylogenetic analyses of nucleotide sequences of ITS 1 and ITS2 rDNA. Sequences of these regions from three Lasallia and 17 Umbilicaria species were aligned to those of seven representatives of the outgroup taxa including Eurotiales, Onygenales and Caliciales (Mycocaliciaceae) and subjected to maximum parsimony, maximum likelihood and neighbour-joining analyses. The resulting phylogenetic hypotheses supported the monophyly of the representative species of Lasallia. However, the species of Umbilicaria did not form a monophyletic sistergroup to Lasallia due to the basal placement of other Umbilicaria species in some analyses. Based on these analyses, if Lasallia is recognized as a separate genus then Umbilicaria appears to be paraphyletic. Although further taxon sampling is required to resolve the monophyly of Umbilicaria, for the present we recommend retaining the current treatment of Lasallia as separate from Umbilicaria.

Type
Research Article
Information
The Lichenologist , Volume 31 , Issue 5 , September 1999 , pp. 477 - 489
Copyright
Copyright © British Lichen Society 1999

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