Three indica male sterile lines, K-qing A, K19A, and K17A, have been bred successively by using sterile plants from the progeny of a hybrid cross between japonica and indica as cytoplasmic male sterile (CMS) gene donor.

• 利用粳籼杂交后代出现的不育株作细胞质雄性不育供体，先后育成了K青A、K19A和K17A等籼型不育系。