Oilseed rape (Brassica napus) was formed ~7,500 years ago by hybridization between B. rapa and B. oleracea, followed by chromosome doubling, a process known as allopolyploidy. Together with more ancient polyploidizations, this conferred an aggregate 72-fold genome multiplication since the origin of angiosperms and high gene content. Cultivation began in Europe during the Middle Ages and spread worldwide. Diversifying selection gave rise to oilseed rape (canola), rutabaga, fodder rape, and kale morphotypes grown for oil, fodder, and food.
This species currently has no variation database. However you can process your own variants using the Variant Effect Predictor: