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Plant Systematics and Evolution

, Volume 215, Issue 1–4, pp 209–227 | Cite as

Molecular phylogeny ofSalicaceae and closely relatedFlacourtiaceae: Evidence from 5.8 S, ITS 1 and ITS 2 of the rDNA

  • Elina Leskinen
  • Cecilia Alström-Rapaport
Article

Abstract

A ribosomal DNA region, including the entire 5.8S RNA gene and the internal transcribed spacers ITS 1 and ITS 2, was used for studying the phylogeny ofSalicaceae and the relationship betweenSalicaceae andFlacourtiaceae. The length of the ITS regions withinSalicaceae andFlacourtiaceae was similar to that found in other angiosperms. The GC content of both ITS regions was high, varying 62.7-72.2%. The most parsimonious tree clusters the wind-pollinatedChosenia bracteosa among theSalix species, suggesting that it should be included in the genusSalix. The grouping withinSalix leaves subg.Salix as paraphyletic, for which reason the subgeneric division is questionable.Populus was monophyletic and formed a sister group toSalix. The interspecific variation of the ITS sequences was very small inSalicaceae, which is in contradiction to the age of the group according to the evidence from fossil data.Idesia polycarpa fromFlacourtiaceae shows great sequence similarity withSalicaceae, but the analysis of 5.8S rDNA supports monophyly of the four species ofFlacourtiaceae sampled for this study.

Key words

Salicaceae Salix Populus Chosenia Flacourtiaceae Idesia Phylogeny ITS rDNA 

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Copyright information

© Springer-Verlag 1999

Authors and Affiliations

  • Elina Leskinen
    • 1
  • Cecilia Alström-Rapaport
    • 2
  1. 1.Department of GeneticsUppsala UniversityUppsalaSweden
  2. 2.Department of Plant BreedingSwedish University of Agricultural SciencesUppsalaSweden

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