Skip to main content

Phylogeny and Diversification in the Melanesian Schefflera Clade (Araliaceae) Based on Evidence from Nuclear rDNA Spacers

Buy Article:

$23.00 plus tax (Refund Policy)

Abstract:

Abstract—

The Pacific species of the polyphyletic genus Schefflera belong to three main clades, of which the Melanesian Schefflera clade is best represented in the archipelagos of New Caledonia, Fiji, Vanuatu, and the Solomon Islands. Previous studies have helped to establish the monophyly of Melanesian Schefflera, but an informal, morphology-based classification system that recognizes five subgeneric groupings within this clade remains largely untested. To examine relationships among Melanesian Scheffleras, DNA sequence data from two spacer regions (ITS and ETS) of the nuclear rRNA genes were gathered from a nearly comprehensive sample of species and analyzed phylogenetically. Results confirm the monophyly of four of the five informal groupings, including ‘Plerandra’ (from Fiji, Vanuatu, Solomon Islands, and New Guinea), ‘Gabriellae’ (from New Caledonia, Fiji, and Vanuatu), ‘Canacoschefflera’ (New Caledonia), and ‘Dictyophlebes’ (Fiji and Solomon Islands). However, rDNA data do not agree with morphology in regard to the fifth group, ‘Dizygotheca,’ which appears polyphyletic in the cladograms based on ITS and ETS sequences.

Keywords: ETS; Fiji; ITS; New Caledonia; Plerandra; Schefflera; Solomon Islands; Vanuatu; paralogy; phylogeny; rDNA

Document Type: Research Article

DOI: https://doi.org/10.1600/036364412X616837

Publication date: 2012-01-01

More about this publication?
  • Access Key
  • Free content
  • Partial Free content
  • New content
  • Open access content
  • Partial Open access content
  • Subscribed content
  • Partial Subscribed content
  • Free trial content
Cookie Policy
X
Cookie Policy
Ingenta Connect website makes use of cookies so as to keep track of data that you have filled in. I am Happy with this Find out more