Molecular phylogenetic analyses identify Alpine differentiation and dysploid chromosome number changes as major forces for the evolution of the European endemic Phyteuma (Campanulaceae)

Schneeweiss, Gerald M.; Pachschwoell, Clemens; Tribsch, Andreas; Schoenswetter, Peter; Barfuss, Michael H. J.; Esfeld, Korinna; Weiss-Schneeweiss, Hanna; Thiv, Mike (2013). Molecular phylogenetic analyses identify Alpine differentiation and dysploid chromosome number changes as major forces for the evolution of the European endemic Phyteuma (Campanulaceae). Molecular phylogenetics and evolution, 69(3), pp. 634-652. Elsevier 10.1016/j.ympev.2013.07.015

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Phyteuma is a chromosomally and ecologically diverse vascular plant genus and constitutes an excellent system for studying both the role of chromosomal change for species diversification and the evolution of high-mountain biota. This kind of research is, however, hampered by the lack of a sound phylogenetic framework exacerbated by the notoriously low predictive power of traditional taxonomy with respect to phylogenetic relationships in Campanulaceae. Based on a comprehensive taxon sampling and analyses of nuclear and plastid sequence and AFLP fingerprint data, Phyteuma is confirmed as a monophyletic group sister to the monotypic Physoplexis, which is in line with their peculiar flower morphologies. Within Phyteuma two clades, largely corresponding to previously recognized sections, are consistently found. The traditional circumscription of taxonomic series is largely rejected. Whereas distinctness of the currently recognized species is mostly corroborated, some interspecific relationships remain ambiguous due to incongruences between nuclear and plastid data. Major forces for diversification and evolution of Phyteuma are descending dysploidy (i.e., a decrease in chromosome base number) as well as allopatric and ecological differentiation within the Alps, the genus' center of species diversity. (C) 2013 Elsevier Inc. All rights reserved.

Item Type:

Journal Article (Original Article)

Division/Institute:

08 Faculty of Science > Department of Biology > Institute of Plant Sciences (IPS) > Plant Development
08 Faculty of Science > Department of Biology > Institute of Plant Sciences (IPS)

UniBE Contributor:

Esfeld, Korinna

Subjects:

500 Science > 580 Plants (Botany)

ISSN:

1055-7903

Publisher:

Elsevier

Language:

English

Submitter:

Peter Alfred von Ballmoos-Haas

Date Deposited:

21 Feb 2014 11:01

Last Modified:

08 Sep 2015 12:05

Publisher DOI:

10.1016/j.ympev.2013.07.015

Uncontrolled Keywords:

Campanulaceae, Physoplexis, Phyteuma, Phylogeny, Chromosome number evolution, Biogeography

BORIS DOI:

10.7892/boris.40903

URI:

https://boris.unibe.ch/id/eprint/40903

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