Plant Systematics and Evolution

, Volume 257, Issue 1–2, pp 95–117

Genome size in Bulgarian Centaurea s.l. (Asteraceae)

Article

DOI: 10.1007/s00606-005-0384-7

Cite this article as:
Bancheva, S. & Greilhuber, J. Plant Syst. Evol. (2006) 257: 95. doi:10.1007/s00606-005-0384-7

Abstract

Thirty-nine species and subspecies of the genera Centaurea, Colymbada, Psephellus and Cyanus (all included in Centaurea s.l.) including many rare and endemic taxa of preponderantly Bulgarian distribution have been investigated with Feulgen DNA image densitometry for holoploid and monoploid genome size (C- and Cx-values). Cyanus varies gradually 2.17-fold between 0.74 pg and 1.56 pg (1Cx). In the remaining taxa two major genome size groups are found, which differ about 1.8-fold in Cx-value. Low values occur in Centaurea subgenera Acrolophus, Solstitiaria, Phalolepis (0.77 pg to 0.90 pg, 1Cx) and Jacea (0.95 pg to 1.09 pg, 1Cx), high values in the genera Colymbada (1.65 pg to 1.93 pg, 1Cx) and Psephellus (1.79 pg, 1Cx, in P. marschallianus). Cx-values support a distinction of Colymbada from Centaurea. Genome size variation is discussed with regard to phylogeny, life form (annual versus perennial), polyploidy, chromosome basic numbers, altitude of occurrence and climate, endemism, and rarity.

Keywords

Centaurea Colymbada Cyanus Psephellus genome size C-value nucleotype Feulgen densitometry 

Copyright information

© Springer-Verlag Wien 2005

Authors and Affiliations

  1. 1.Institute of BotanyBulgarian Academy of SciencesSofiaBulgaria
  2. 2.Department of Systematic and Evolutionary Botany, Faculty of Life SciencesUniversity of ViennaViennaAustria

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