Chinese cabbage is a widely cultivated leafy vegetable, but it is heavily affected by clubroot disease caused by Plasmodiophora brassicae. One of the earliest cloned clubroot resistance genes, BraCRa, has been identified as conferring resistance to this disease. A specific Ca2+ sensor, BraCBL1.2, has been found to be involved in the BraCRa-mediated clubroot resistance, providing a basis for further research on resistance to Plasmodiophora brassicae in Chinese cabbage.