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Citation for Study 1012

About Citation title: "Phylogeny of holoparasitic Orobanche (Orobanchaceae) inferred from nuclear ITS-sequences.".
About This study was previously identified under the legacy study ID S903 (Status: Published).

Citation

Schneeweiss G., Colwell A., Park J., Jang C., & Stuessy T. 2003. Phylogeny of holoparasitic Orobanche (Orobanchaceae) inferred from nuclear ITS-sequences. Molecular Phylogenetics and Evolution, 30: 465-470.

Authors

  • Schneeweiss G.
  • Colwell A.
  • Park J.
  • Jang C.
  • Stuessy T.

Abstract

Orobanche is the largest genus among the holoparasitic members of Orobanchaceae. We present the first molecular phylogenetic analysis (using nuclear ITS-sequences) that includes members of all sections of Orobanche, Gymnocaulis, Myzorrhiza, Trionychon, and Orobanche. Orobanche is not monophyletic, but falls into two lineages: (1) the Orobanche-group comprises Orobanche sect. Orobanche and the small Near Asian genus Diphelypaea and is characterized by a chromosome base number of x = 19; (2) the Phelipanche-group contains Orobanche sects. Gymnocaulis, Myzorrhiza, and Trionychon and possesses a chromosome base number of x = 12. The relationships between these two groups and to other genera such as Boschniakia or Cistanche remain unresolved. Within the Orobanche-group, O. macrolepis and O. anatolica (including O. colorata) constitute two phylogenetically distinct lineages. Intrasectional structurings proposed by some authors for O. sect. Orobanche are not confirmed by the molecular data. In most cases, intraspecific sequence divergence between accessions, if present, is negligible and not correlated with morphological or ecological traits. In a few cases, however, there is evidence for the presence of cryptic taxa.

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  • Canonical resource URI: http://purl.org/phylo/treebase/phylows/study/TB2:S1012
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