부산대학교 도서관

A karyomorphological study of the species Heptacodium miconioidesand five species in Caprifoliaceae of presumably related genera [Abeliaand Depelta(Linnaeeae); Lycesteriaand Lonicera(Caprifolieae); Weigela(Diervilleae)] reveals similarities in some karyological features such as structure of interphase nuclei, chromosome size, and condensation behaviour of chromosomes during mitotic prophase. However, differences between them in chromosome base number and morphology of metaphase chromosomes have also been revealed. The chromosome number of Heptacodium2n= 28 is unique in Caprifoliaceae, presumably having resulted from polyploidization following hybridization between two ancestral species (possibly with chromosome base number x= 8 or 9) bearing characters of tribes Caprifolieae and Linnaeeae, respectively. The phylogenetic position of Heptacodiumis discussed based on combination of karyomorphology and previous morphological and molecular data.