通过连续３年四代对ｍｓ５ｍｓ６核雄性不育系的研究表明，从群体直接选择不育株与从可育株后代分离的不育株表现一致，且不育性稳定。连续姊妹交，能有效促进不育基因的纯合，显著提高不育株率。同时，双隐性核不育系主要经济性状优良，为选配强优势组合奠定了良好基础。并已获得不育株率达７３．１％、显著高于１∶１理论值、综合性状俱佳的优良不育系。 The research on the ms5ms6 nuclear male sterile lines of three generations of four generations of continuous generations showed that the direct selection of sterile plants from the population and the sterile plants isolated from the progenies of the fertile plants performed consistently and the sterility was stable. Continuous sisters pay, can effectively promote the homozygosity of sterile genes, significantly improve the rate of sterile plants. At the same time, the main economic traits of double recessive nuclear sterile lines were excellent, which laid a good foundation for the combination of strong superiority. And has been sterile line rate of 73.1%, significantly higher than the theoretical value of 1: 1, the comprehensive trait of excellent CMS.