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Abstract Detail

Systematics Section/ASPT

Hartooni, Nairi [1], Guilliams, Matt [2], Baldwin, Bruce [3].

Phylogenetic Relationships in Lewisia (Montiaceae) Based on DNA Sequence Data (ITS, ETS, rps16, trnL-trnF).

Lewisia comprises 25-30 taxa of perennial herbs in the Montia family, or Montiaceae. This variable, western North American genus has been the subject of considerable taxonomic study, although molecular phylogenetic data have been lacking to evaluate evolutionary relationships. Here we examine phylogenetic relationships in Lewisia using DNA sequence data from the nuclear ribosomal internal and external transcribed spacer regions as well as chloroplast rps16 intron and trnL-trnF intergenic spacer. Sequence data were obtained for nearly all recently recognized Lewisia taxa and for many close relatives in Montiaceae, including Calandrinia,Calyptridium, Cistanthe, Claytonia, Lenzia, Lewisiopsis, Montia, Montiopsis, and Phemeranthus. Lewisia was recovered as a monophyletic group with strong support in all analyses, and several clades within the genus were resolved. Evolutionary and biogeographic implications of the findings and consequences for infrageneric classification of Lewisia will be discussed.

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1 - University of California, San Francisco, Department of Microbiology and Immunology, N372E Genentech Hall, Mission Bay, 600 16th St. Box 2200, San Francisco, CA, 94158, USA
2 - University Of California, Berkeley, University And Jepson Herbaria, 1001 Valley Life Sciences Building #2465, Berkeley, CA, 94720, USA
3 - University Of California Berkeley, JEPSON HERB & DEPT INTEGR BIOL, 1001 Valley Life Sciences Building, MC 2465, Berkeley, CA, 94720-2465, USA


Presentation Type: Oral Paper:Papers for Sections
Session: 53
Location: Delaware C/Hyatt
Date: Wednesday, July 11th, 2012
Time: 1:30 PM
Number: 53001
Abstract ID:924

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