Genome size and karyotype evolution in the slipper orchids (Cypripedioideae: Orchidaceae).

  title={Genome size and karyotype evolution in the slipper orchids (Cypripedioideae: Orchidaceae).},
  author={Antony Cox and George Abdelnour and Matt Bennett and Ian Leitch},
  journal={American journal of botany},
  volume={85 5},
Nuclear DNA contents (4C) were estimated by Feulgen microdensitometry in 27 species of slipper orchids. These data and recent information concerning the molecular systematics of Cypripedioideae allow an interesting re-evaluation of karyotype and genome size variation among slipper orchids in a phylogenetic context. DNA amounts differed 5.7-fold, from 24.4 pg in Phragmipedium longifolium to 138.1 pg in Paphiopedilum wardii. The most derived clades of the conduplicate-leaved slipper orchids have… CONTINUE READING

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