Systematic study was made on wide hybridization between Brassica napus and Orychophragmus violaceus (L. )O. E. Schalz in this experiment. In the firstly synthe sized intergeneric hybrid between B. napus and O. violaceus, the phenomenon of genome separation during mitosis of the hybrid cell was observed. During mitosis genomes from the two parent species were arrarged separately in the hybrid cells and later separated, resulting in formation of two types of haploid cells with gamete chromosome numbers of the...