Phylogeny of the Coneflowers and Relatives (Heliantheae: Asteraceae) Based on Nuclear rDNA Internal Transcribed Spacer (ITS) Sequences and Chlorplast DNA Restriction Site Data

@inproceedings{Urbatsch2000PhylogenyOT,
  title={Phylogeny of the Coneflowers and Relatives (Heliantheae: Asteraceae) Based on Nuclear rDNA Internal Transcribed Spacer (ITS) Sequences and Chlorplast DNA Restriction Site Data},
  author={Lowell E. Urbatsch and Bruce G. Baldwin and Michael J. Donoghue},
  year={2000}
}
Abstract The internal transcribed spacer (ITS) region of 18S–26S nuclear ribosomal DNA (rDNA) was sequenced in 65 taxa representing most coneflowers (i.e., species in Dracopis, Echinacea, Ratibida, and Rudbeckia) and other taxa representing 21 outgroup genera of tribe Heliantheae. Results of parsimony analysis of the rDNA dataset by itself and in combination with the cpDNA dataset uphold the hypothesis from an earlier cpDNA restriction site study that Echinacea is not closely related to the… Expand
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Results from these analyses are in strong agreement with many of the conclusions from previous studies, most importantly: Valerianaceae is sister to Dipsacaceae; Triplostegia is more closely related to species of D dipsacaceae than to Valerians; and Valeriana appears not to be monophyletic. Expand
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