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Plant Systematics and Evolution

, Volume 214, Issue 1–4, pp 147–160 | Cite as

Molecular phylogeny ofCheirolophus (Asteraceae:Cardueae-Centaureinae) based on ITS sequences of nuclear ribosomal DNA

  • Alfonso Susanna
  • Teresa Garnatje
  • Núria Garcia-Jacas
Article

Abstract

The genusCheirolophus has an interesting western Mediterranean and Macaronesian distribution. Here we investigate the delimitation of the genus and its exclusion from the large genusCentaurea, the systematic position of the related genusPaleocyanus, the delimitation of some species and the phylogeny of the group. We have carried out a phylogenetic analysis of the PCR-generated sequences of the internal transcribed spacers (ITS-1 and ITS-2) of the nuclear ribosomal DNA. The results suggest that the genus, includingPaleocyanus crassifolius is monophyletic; thus, a new combination of this species underCheirolophus is proposed. The Macaronesian group of species is also monophyletic, indicating a single colonization of the archipelago. The poor resolution of microspecies in the Macaronesian group reinforces the hypothesis of a very recent differentiation of the group.

Key words

Asteraceae Cardueae-Centaureinae Cheirolophus Mediterranean molecular phylogeny ITS 

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Copyright information

© Springer-Verlag 1999

Authors and Affiliations

  • Alfonso Susanna
    • 1
  • Teresa Garnatje
    • 1
  • Núria Garcia-Jacas
    • 1
  1. 1.Institut Botànic de Barcelona (C.S.I.C.)BarcelonaSpain

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