He 50A is a new WA-type early cropping indica CMS line in rice, which is developed by crossing Jin 23A to a selected F4 plant of Zhong 9B//161-5B/Jin 23B through successive selection and backcrossing.

• 摘要贺50A是以金23A为母本，中9B//161-5B/金23B的F4代单株为父本，经多代择优回交与选择育成的早籼型三系不育系。