1998～ 2 0 0 1年对南校 15号单交种进行雄性不育化的育种。其母本系 92 2 9已转育成 2种胞质类型的雄性不育系即 92 2 9cms唐徐和 92 2 9cms M,不育株率高达 99.8%以上 ,育性稳定。通过“两系法”配制的掺合型南校 15号的生产力和抗病性与正常胞质南校 15号处于同一水平 ,产量基本持平或略有提高 From 1998 to 2001, breeding of male sterility was carried out on the single crossbreed of South School No. 15. Its maternal line 92 2 9 has been transformed into two cytoplasmic male sterile lines 92 92cms Tang Xu and 92 2 9cms M. The rate of sterile plants is as high as 99.8%, and its fertility is stable. The productivity and disease resistance of blended Southern School No. 15 prepared by the “two lines of law” were at the same level as that of the normal cytoplasm Nanxiao No.15, and the yield was basically the same or slightly increased