Abstract:Making use of the transforming dominant interactive gene of GMS from Brassica pekinensis to B.campestris, three sterile lines have been successfully breeded. The general tendency of the test of combining ability is as follows: homozygous sterile > fully sterile >heterozygous sterile. A restoring gene with epistaic dominant nucleus interaction character has been obtained through genetic analysis. Fertility is made of dipdysgenesis dominant interaction of GMS gene (Sp_) and epistatic dominant nucleus interaction of restoring gene (Ms_) of control. And the rela-tive genetic model is made clear.