Naslov
Karyotypes of Allium senescens L. ssp. montanum (Fries) Holub populations from the Mt. Biokovo region

Autori
Besendorfer, Višnja ; Šop, Klaudija ; Šolić, Marija-Edita ; Papeš, Dražena

Izvornik
Acta Botanica Croatica (0365-0588) 60 (2001), 2; 177-186

Vrsta, podvrsta i kategorija rada
Radovi u časopisima, članak, znanstveni

Ključne riječi
Allium senescens ssp. montanum; Giemsa C-banding; Karyotype; Nucleolar organising regions; Silver staining

Sažetak
The karyotypes of three Allium senescens ssp. montanum (Fries) Holub populations from the Mt Biokovo region were investigated. This species has been poorly cytogenetically analysed, and with respect to Croatian populations such investigations have never been carried out. The chromosome number, morphology and distribution of heterochromatin were investigated. The number, position and activity of nucleolar organising regions (NORs) were also analysed. In all three populations, only plants with a tetraploid (2n = 4x = 32) chromosome complement were found. The chromosome complement consisted of seven groups of four metacentric and one group of four submetacentric chromosomes bearing the satellite on the short arm. Chromosomes exhibit four types of Giemsa C-bands: telomeric, intercalary, centromeric bands and those located on satellites. Eight chromosomes with the characteristic banding pattern were distinguished. Silver staining revealed a maximum of four nucleoli that corresponded to the maximum number of active NORs (Ag-NORs) located terminally on the short arm of four submetacentric chromosomes. The results obtained suggest that A. senescens ssp. montanum from the Mt Biokovo region is an autotetraploid species.

Izvorni jezik
Engleski

Znanstvena područja
Biologija

POVEZANOST RADA