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Phylogenetic placement of Triaenophora (formerly Scrophulariaceae) with some implications for the phylogeny of Lamiales

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Abstract:

Phylogenetic placement of Triaenophora together with Rehmannia were explored with DNA sequence data from five regions (rbcL, ndhF, rps16, trnL-F, nr ITS) in two combined data matrices. One (rbcL, ndhF, rps16) represented a wide sampling across most families of Lamiales. The other data matrix represented two DNA regions partly unalignable across Lamiales (trnL-F, nr ITS) plus rps16, which proved to be variable enough to give resolution at a smaller taxonomic level in Lamiales. Triaenophora rupestris and Rehmannia are sister taxa, composing a strongly supported clade, which is sister to all representative genera of Orobanchaceae. Furthermore, Paulowniaceae and Phrymaceae are next to Orobanchaceae and Triaenophora-Rehmannia clade. All of the above taxa are only distantly related to Scrophulariaceae and/or Plantaginaceae (sensu APG II). Mazus and Lancea would be excluded from Phrymaceae. The resulting phylogeny is in agreement with other data such as phytochemistry and provides a framework for further investigation of character evolution in Lamiales.

Keywords: LAMIALES; OROBANCHACEAE; PHYLOGENY; REHMANNIA; SCROPHULARIACEAE SENSU LATO; TRIAENOPHORA

Document Type: Research Article

Affiliations: 1: Institut für Spezielle Botanik, Johannes Gutenberg-Universität Mainz, 55099 Mainz, Germany 2: School of Life Science, East China Normal University, Shanghai, China 3: Department of Chemistry, The Technical University of Denmark, 2800 Lyngby, Denmark 4: School of Life Science, East China Normal University, Shanghai, China;, Email: hqli@bio.ecnu.edu.cn

Publication date: August 1, 2009

iapt/tax/2009/00000058/00000003/art00005
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