Molecular Phylogeny of the Pungentes Subsection of Chorizanthe (Polygonaceae: Eriogonoideae) with Emphasis on the Phylogeography of the C. pungens-C. robusta Complex

The nuclear ribosomal internal transcribed spacer and chloroplast rbcL-accD intergenic spacer regions of species in the Pungentes subsection of Chorizanthe (spineflower) were analyzed. The goals of the study were to ascertain the phylogenetic relationships of taxa in the C. pungens-C. robusta comple...

Full description

Saved in:
Bibliographic Details
Published in:Madroño 2009-07, Vol.56 (3), p.168-183
Main Authors: Brinegar, Chris, Baron, Sandra
Format: Article
Language:English
Subjects:
Biological taxonomies
Chloroplast DNA haplotypes
Chloroplasts
Chorizanthe
Contents
Haplotypes
internal transcribed spacer
Internal transcribed spacers
Maximum parsimony
Phylogenetics
Phylogeny
phylogeography
Plants
Polygonaceae
Pungentes
spineflower
Taxa
Wildlife conservation
Citations: Items that this one cites
Items that cite this one
Online Access:Request full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:The nuclear ribosomal internal transcribed spacer and chloroplast rbcL-accD intergenic spacer regions of species in the Pungentes subsection of Chorizanthe (spineflower) were analyzed. The goals of the study were to ascertain the phylogenetic relationships of taxa in the C. pungens-C. robusta complex to each other and to the other Pungentes species. The ITS phylogenies showed that C. diffusa was most distant from the other species and that C. cuspidata, C. pungens and C. robusta were not monophyletic. The four varieties of the C. pungens-C. robusta complex resolved into montane and coastal groups but the groupings were not in agreement with current classification. Statistical parsimony analysis divided 26 chloroplast DNA haplotypes into four groups with the 18 sampled populations of the C. pungens-C. robusta complex displaying a high degree of phylogeographic structure despite some incomplete lineage sorting. The haplotype analysis was not discordant with the ITS phylogeny. Possible taxonomic revisions and implications for conservation and management are discussed.
ISSN:0024-9637
1943-6297
DOI:10.3120/0024-9637-56.3.168