Yield components of the rapeseed crop, in free pollination (green bars) and restricted pollination (blue bars) treatments for the different cultivars. A = Number of siliques per plant. B = Number of seeds per silique. C = Thousand seed weight. D = Fat content percentage. E = Fruit set percentage. F = Yield expressed in kilograms per hectare. Identical letters indicate no significant differences (p > 0.05) between treatments within each cultivar.