noun
rape plant; oilseed rape; Brassica campestris
Refers to the plant species grown for oilseed; the term is neutral and used in botanical and agricultural contexts.
春になると、アブラナの黄色い花が一面に咲く。
In spring, yellow flowers of the rape plant bloom all over.
アブラナから採れる油は菜種油と呼ばれる。
Oil obtained from rape is called rapeseed oil.
菜種油 is the oil produced from the seeds of アブラナ, while アブラナ refers to the plant itself.
The name アブラナ literally means 'oil vegetable', from 油 (あぶら, 'oil') and 菜 (な, 'vegetable' or 'greens'), referring to its use as an oilseed crop.