Under Australian field conditions, gene flow between canola (Brassica napus
) and a related weed species, wild radish (Raphanus raphanistrum) was exami
ned. A model system without transgenic material but utilising herbicide res
istance was employed. In the first year of this study a total of five putat
ive hybrids have been discovered. The morphology, pollen fertility and seed
set of these individuals is discussed.