Plant Systematics and Evolution

, Volume 217, Issue 3–4, pp 245–257

Karyotype constancy and genome size variation in BulgarianCrepis foetida s. l. (Asteraceae)

  • Dessislava Dimitrova
  • Irma Ebert
  • Johann Greilhuber
  • Stefan Kozhuharov
Article

DOI: 10.1007/BF00984369

Cite this article as:
Dimitrova, D., Ebert, I., Greilhuber, J. et al. Pl Syst Evol (1999) 217: 245. doi:10.1007/BF00984369

Abstract

Ten populations ofCrepis foetida from Bulgaria belonging to the three subspeciesfoetida, rhoeadifolia, andcommutata were analyzed karyologically using haematoxylin staining, Giemsa C-banding, fluorochrome banding, Ag-NOR staining, Feulgen cytophotometry (scanning densitometry and video-based image analysis), and propidium iodide flow cytometry. The quantitatively-evaluated karyotype structure was similar among all populations, with minor variation in a few intercalary sites only and in the amount of NOR-associated heterochromatin (satellites). In contrast to the karyotypic constancy the genome size ofC. foetida subsp.commutata was about 10% lower than those of the other two subspecies, which had similar genome sizes. The genome size measurements using three different methods resulted in highly correlated data. The genome size difference adds some weight to previous taxonomic opinions treatingC. foetida subsp.commutata at species level, asC. commutata.

Key words

Asteraceae Crepis foetida Subspecies idiograms haematoxylin staining Giemsa C-banding fluorochrome banding Ag-NOR staining genome size Feulgen densitometry propidium iodide flow cytometry 

Copyright information

© Springer-Verlag 1999

Authors and Affiliations

  • Dessislava Dimitrova
    • 1
  • Irma Ebert
    • 2
  • Johann Greilhuber
    • 2
  • Stefan Kozhuharov
    • 1
  1. 1.Institute of BotanyBulgarian Academy of SciencesSofiaBulgaria
  2. 2.Institute of Botany of the University of ViennaViennaAustria

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