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Genetic variability in the Physconia muscigena group (Physciaceae, Ascomycota) in the Northern Hemisphere

Published online by Cambridge University Press:  29 July 2020

Jakub Starosta Open the ORCID record for Jakub Starosta [Opens in a new window]  and
David Svoboda Open the ORCID record for David Svoboda [Opens in a new window]
Jakub Starosta
Affiliation:
Department of Botany, Faculty of Science, Charles University, Benátská 2, 128 01 Prague 2, Czech Republic
David Svoboda*
Affiliation:
Department of Botany, Faculty of Science, Charles University, Benátská 2, 128 01 Prague 2, Czech Republic
*
Author for correspondence: David Svoboda. E-mail: david.svoboda@email.cz
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Abstract

The principal goal of our study was to test whether ecologically and chemically different populations of lichens in the Physconia muscigena group belong to a single, or multiple, species. We used sequence data from three markers (ITS rDNA, mtSSU rDNA and TEF1-α) for the reconstruction of phylogenetic trees based on a sampling of mostly European and Canadian populations of P. muscigena (Ach.) Poelt, P. muscigena var. bayeri (Nádv.) Poelt and P. isidiomuscigena Essl. In addition, we sought any possible geographical or ecological trends among chemotypes and haplotypes. Results show that: 1) sequence data of ITS rDNA and TEF1-α show large genetic variation in the Physconia muscigena group, which does not correlate with geographical distribution or thallus chemistry; 2) Physconia muscigena var. bayeri and P. isidiomuscigena appear undifferentiated with P. muscigena in our phylogenetic trees, and the three species cannot be distinguished on the basis of ITS rDNA, mtSSU rDNA and TEF1-α sequences. We therefore synonymized Physconia muscigena var. bayeri with P. muscigena and we recombine P. isidiomuscigena as a variety of P. muscigena.

Keywords

cryptic speciesITS rDNAlichenphylogenyPhysconia isidiomuscigenaPhysconia muscigena var. bayeriTEF1-α
Type
Standard Papers
Information
The Lichenologist , Volume 52 , Issue 4 , July 2020 , pp. 305 - 317
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Copyright
Copyright © British Lichen Society 2020

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