Karyological study of the genus Gundelia (Compositae) in Turkey

  • İlker Genç
  • Mehmet Firat
Keywords: Chromosome number, karyotype asymmetry, secondary constriction, Cichorieae, Scolyminae

Abstract

Karyotypes in 12 taxa of Gundelia are compared, based on Feulgen-stained somatic metaphase chromosomes. The karyotypes of G. anatolica, G. asperrima, G. cilicica, G. colemerikensis, G. dersim, G. glabra, G. komagenensis, G. mesopotamica, G. munzuriensis and G. vitekii are described for the first time. Karyological analyses indicate relationships among the species with respect to their asymmetry indices. All Gundelia species studied were diploid with 2n = 2x = 18 chromosomes. All karyotypes are symmetrical, consisting of metacentric and submetacentric chromosomes. The submetacentric chromosomes of all the investigated specimens contain a secondary constriction. Three chromosome types were identified according to the position of the secondary constrictions. The chromosomes ranged in size from 2.00 µm to 7.02 µm. The total haploid chromosome length (THL) varied from 24.97 μm (G. asperrima) to 42.56 μm (G. rosea). To determine the karyological relationships among taxa, PCoA (Principal Coordinate Analysis) with six uncorrelated parameters was performed.

Author Biographies

İlker Genç

Department of Pharmaceutical Botany, Faculty of Pharmacy, İstanbul University, İstanbul, Turkey

Mehmet Firat

Department of Biology Education, Faculty of Education, Van Yüzüncü Yıl University, Van, Turkey

Published
2019-05-10
How to Cite
Genç, İlker, & Firat, M. (2019). Karyological study of the genus Gundelia (Compositae) in Turkey. Caryologia. International Journal of Cytology, Cytosystematics and Cytogenetics, 72(1), 45-53. https://doi.org/10.13128/cayologia-250
Section
Articles