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Abstract Detail


Systematics Section

Ahmad Puad , Aida Shafreena [1], Barkman, Todd J [1].

Phylogenetics relationship of the genus Schefflera (Araliaceae) in Borneo, Malaysia inferred from chloroplast and nuclear DNA sequences .

The molecular phylogeny of Schefflera in Borneo based on chloroplast DNA and nuclear ribosomal DNA was estimated to test the monophyly of Schefflera in Borneo and determine species relationships to the Asian clade. Based on study conducted in the past, the genus Schefflera comprises five unrelated clades distributed throughout all the major lineages of Araliaceae that correspond closely to geographic distribution: Scheffleras.str, Neotropical Schefflera,Pacific Schefflera, African-Malagasy Schefflera and Asian Schefflera. Although Borneo is part of the Asian region, not a single species from Borneo was included in previous studies. To study the phylogenetic relationship of the genus Schefflera in Borneo we sequenced three noncoding cpDNA (accD-psaI,psbA-trnH, trnL-trnF) and the nrDNA ITS and 3'ETS regions. The analyses from maximum likelihood suggested that Schefflera in Borneo falls within the Asian clade. Schefflerain Borneo are not monophyletic but rather are comprised of eight lineages from within the Asian clade. Some of the taxa are more closely related to Indonesian (West Papua) and New Guinea species while others are more closely related to Chinese species.

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1 - Western Michigan University, Biological Sciences, 3437 Wood Hall, 1903 W.Michigan Ave., Kalamazoo, MI, 49008, USA

Keywords:
Schefflera
Borneo
chloroplast DNA
nuclear ribosomal DNA.

Presentation Type: Oral Paper:Papers for Sections
Session: 27
Location: Lindell A/Chase Park Plaza
Date: Tuesday, July 12th, 2011
Time: 10:30 AM
Number: 27008
Abstract ID:39


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