Recessive Genic Male Sterility in Brassica napus and Its Application

The Brassica napus recessive genic male sterile (RGMS) line was widely used in heterosis utilization because it possesses stable sterility, no negative cytoplasmic effects, easy restoration and multi-restored resources. There are mainly two recessive genic male sterile lines in China. One is controlled by two duplicate recessive genes, and another is controlled by two loci, one recessive mutant locus and one multiple allele locus. With cloning of these sterile genes, some molecular mechanisms of genic male sterility in Brassica napus was deciphered. In this review, we summarize the advances in research on molecular mechanism of genic male sterility in Brassica napus . A feasible way is proposed to breed entire sterile populations of genic male sterile line in Brassica napus , which shows broad prospects in heterosis utilization.