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Plant Systematics and Evolution

, Volume 246, Issue 1–2, pp 19–34 | Cite as

Phylogenetic relationships within the ‘core’ Laureae (Litsea complex, Lauraceae) inferred from sequences of the chloroplast gene matK and nuclear ribosomal DNA ITS regions

  • Jie Li
  • D. C. Christophel
  • J. G. Conran
  • Hsi-Wen Li
Article

Abstract.

A phylogenetic analysis of the ‘core’ Laureae (Litsea complex) was conducted using the chloroplast gene matK and nuclear ribosomal DNA ITS sequences to investigate generic relationships and boundaries within the complex. Despite low genetic divergence for matK, rooting of the tree with Sassafras resulted in Iteadaphne as the basal member of the complex and five resolved clades: a Neolitsea clade and then Laurus, Parasassafras, Litsea and Lindera clades in a large polytomy with unresolved Lindera sections plus Umbellularia. A combined analysis of the data (identical to the ITS results) provided a more resolved phylogeny of the Laureae, with four major lineages: the Laurus, Litsea, Lindera and Actinodaphne II clades. These clades also appear to reflect the importance of inflorescence structure and ontogeny within the Laureae, as well as data from cuticular micromorphology, but there was no support for traditional generic characters such as 2- versus 4- celled anthers. As a result, genera such as Actinodaphne, Litsea, Neolitsea and Lindera were polyphyletic in all analyses. Parasassafras was related to Sinosassafras by the matK data, but distant from it in the ITS and combined analyses.

Key words

Lauraceae Laureae matITS molecular phylogeny Litsea  Lindera classification 

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Copyright information

© Springer-Verlag Wien 2004

Authors and Affiliations

  • Jie Li
    • 1
  • D. C. Christophel
    • 2
  • J. G. Conran
    • 3
  • Hsi-Wen Li
    • 1
  1. 1.Laboratory of Plant Phylogenetics and Conservation BiologyXishuangbanna Tropical Botanical GardenP.R. China
  2. 2.Department of Biological ScienceUniversity of DenverUSA
  3. 3.Centre for Evolutionary Biology and BiodiversityDiscipline of Environmental BiologyAustralia

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