Karyotype of some Thai Hypoxidaceae species

Abstract

Somatic chromosome numbers and karyotypes of nine species in three genera of Thai Hypoxidaceae were determinedin root tips. All species are diploid with 2n = 18 and asymmetrical karyotypes including metacentric (m) submetacentric (sm)subtelocentric (st) and also telocentric (t) in some species. Satellite chromosomes (SAT) were observed in all species studiedexcept in C. latifolia. The karyotypes of Curculigo ensifolia 4m+8sm+6st(2SAT), C. latifolia 2m+14sm+2st, C. megacarpa2m+12sm+4st(2SAT), C. villosa 4m+10sm(2SAT)+4st, Hypoxis aurea 2m+8sm+8st(2SAT), Molineria capitulata 2m+10sm+2st (2SAT)+4t, M. trichocarpa 2m+10sm+6st(2SAT), M. gracilis and M. latifolia 4m+8sm+4st (2SAT)+2t are reported forthe first time. The chromosome relative length of Curculigo, Hypoxis and Molineria range between 3.44-9.55, 4.03-8.12 and3.64-8.97, respectively.

Keywords

• karyotype
• Thai Hypoxidaceae
• Curculigo
• Hypoxis
• Molineria