The spontaneous gene transfer from oilseed rape (Brassica napus, 2n=38, gen
omic constitution AACC) to the weedy relatives B. rapa (2n = 20; AA), B. ju
ncea (2n=36, AABB), Hirschfeldia incana(B. adpressa, 2n=14, AdAd), Raphanus
raphanistrum (2n=18, RrRr) and Sinapis arvensis (2n=18, Sar Sar) has been
studied in controlled experiments or in natural populations. The extent and
possible consequences of this interspecific and intergeneric gene flow fro
m oilseed rape are evaluated in a review of relevant European research.