A rapid fluorescent in situ hybridization protocol, which can be compl
eted in one working day, has been utilised to visualize chromosome pre
parations of barley, chickpea, white clover, millet, rye, sugarcane, w
heat, Aegilops spp. and Leymus spp. Both total genomic DNA and cloned
nuclear rDNA were used as a probe. This protocol has the advantage of
brevity and flexibility over more conventional approaches, and has mad
e fluorescent in situ hybridization a routine cytological procedure.