Rapeseed Plants (IMAGE) Cell Press Caption This is a photograph of the bright-yellow-blossom rapeseeds, which are the main ingredient for canola oil. Credit Daohong Jiang Usage Restrictions Credit Required. License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.