Discovery and Breeding of Genic Male Sterility 1601AB in Brassica napus

wo materials (a recessive GMS line 1757A as maternal and a conventional double low species 601 as paternal) was crossed, and its filial generation was progated in Summer at Weining. Six sterile lines, three fertile lines and three semisterile lines were discovered among its selfpollinated progeny of F3. After selection for 8 generations in 4 years, the material with 75% of sterility was obtained, which could keep stable and thorough sterility of recessive GMS from its parents and has wide restoring lines. Fertile plants of the material can keep 75% sterility to others 1∶1 material with recessive genic male sterility. In addition, the material is double low type and offers a new sterility source for quality breeding. The material has increased gene pools for genic male sterility.