FLUORESCENT BANDING-PATTERN ANALYSIS OF 8 TAXA OF PHASEOLUS AND VIGNAIN RELATION TO THEIR PHYLOGENETIC-RELATIONSHIPS

Phylogenetic relationships among eight taxa of seven species of Phaseo lus and Vigna (Phaseolus angularis, P. aureus, P. calcaratus, P. cocci neus, P. vulgaris, Vigna sesquipedalis and V sinensis; 2n = 22 each) w ere studied by the fluorescent chromosome banding technique. Preparati ons of somatic metaphase chromosomes of each taxon were sequentially s tained with Giemsa, GC-specific fluorochrome chromomycin A3 (CMA) and AT-specific fluorochrome 4'-6-diamidino-2-phenylindole (DAPI). On the basis of the fluorescent banding patterns of the 22 chromosomes of eac h taxon, P. angularis, P. coccineus (from China and Korea) and P. vulg aris were grouped into one group (''Phaseolus group''), P. aureus and two Vigna species were grouped into another ('' Vigna group'') and P. calcaratus was grouped in an independent group.