Introgression of Resistance to Shattering in Brassica napus from Brassica juncea through Non‐Homologous Recombination

Genetic information conffering non‐ shattering of siliques has been introgressed in rapeseed (Brassica napus) following; interspecific hybridization between Brassica juncea and B. napus. A reconstituted B. napus plant with complete non‐dehiscence of its fruits was isolated in the BC‐, generation. This plant had normal meiosis and formed 19 bivalents. Its seed fertility, however, was low (23 percent). It is suggested that the gene(s) for shattering‐resistance were incorporated into a B. oleracea chromosome following allosyndetic; chromosome pairing and. segmental exchange between B. nigra and B. oleracea chromosomes in the initial interspecific AABC hybrid.