Breeding Methods of Three Lines with a Recessive Epistasis Nuclear Male Sterile in Brassica napus

The paper introduces the breeding methods of the homozygous two-type line,temporary maintainer line and complete sterile line with a recessive epistasis nuclear male sterile.The process is including first breeding the homozygous two-type line with a recessive epistasis nuclear male sterile and secondly breeding the temporary complete maintainer line with the similar or same main agronomic characters of the homozygous two-type line by the backcross.The breeding method with the easy,simple and effective advantages has been used in the breeding of REGMS118A with a recessive epistasis nuclear male sterile