Development of Genetic Male Sterile Line from the Flowering Chinese Cabbage cv. Teqingchixin 4

A genetic male sterile lines obtained through 3 generations of backccross.A heat-resistant Chinese cabbage Z49A was used as a donor of male sterility and a flowering Chinese cabbage variety Teqingchixin 4 as recurrent parent,and a backcross procedure for transferring genetic male sterile was designed based on the multiple allele hypothesis of genetic male sterility.New AB line type,new male sterile lines and their corresponding temporary maintainer lines of flowering Chinese cabbage were obtained after 4 generations of backcross.The new genetic male sterile line with strong fruiting ability,100% of male sterile plants and 100% of male sterility was obtained.