Abstract: Pollen free type (PFT) genic male-sterile (GMS) line Nanguangzhan had turned into WA type_like CMS line by method of in vitromutation. The restoring and maintaining relationship of NT1 and NT2, the two typical abortion type (TAT) variants derived from Nanguangzhan somaclones was similar to that of WA type, viz. the restorer lines and maintainer lines of WA type were also fit for NT1 and NT2. NT1 had been backcrossed with its maintainer lines for ten generations and kept male sterility.