Chloroplast DNA phylogeny, reticulate evolution, and biogeography of Paeonia (Paeoniaceae).

@article{Sang1997ChloroplastDP,
  title={Chloroplast DNA phylogeny, reticulate evolution, and biogeography of Paeonia (Paeoniaceae).},
  author={Tao Sang and D. Crawford and Tod F. Stuessy},
  journal={American journal of botany},
  year={1997},
  volume={84 8},
  pages={
          1120
        }
}
The coding region of the mat K gene and two intergenic spacers, psb A-trn H and trn L(UAA)-trn F(GAA), of cpDNA were sequenced to study phylogenetic relationships of 32 Paeonia species. In the psb A-trn H intergenic spacer, short sequences bordered by long inverted repeats have undergone inversions that are often homoplasious mutations. Insertions/deletions found in the two intergenic spacers, mostly resulting from slipped-strand mispairing, provided relatively reliable phylogenetic information… 
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TLDR
The joint use of ITS and cpDNA markers facilitates independent assessment of intraspecific phylogenetic hypotheses and can expose cases in which introgression or phylogenetic sorting has caused incongruencies among haplotype trees.
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TLDR
The analyses revealed that A. nevadensis is most closely related to A. dealbata and A. mallotopus forms a strongly supported clade with A. unalaschcensis, and earlier biogeographical hypotheses that suggested an arctic origin and southward spread of the genus are not supported.
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