Abstract: The present invention discloses a method for breeding cruciferous vegetable materials and varieties with a double haploid induction line of rapeseed, including: 1) collecting resources of cruciferous vegetables, identifying and classifying same, and regulating the sowing time of the double haploid induction line of rapeseed to ensure flower synchronization; 2) pollinating the cruciferous vegetables with the double haploid induction line of rapeseed; 3) performing bagged selfing or bud peeling forced selfing at a bud stage on the induced progeny individual plants; 4) identifying the strain stability of the induced selfing progenies; 5) test-crossing stable strains with sterile lines; 6) investigating the sterile degree of test-cross progenies to breed excellent maintainer lines; 7) pollinating sterile plants of the test-cross progenies with the double haploid induction line of rapeseed; 8) investigating the fertility of the induced progenies, and continuing to pollinate sterile individual plants with the induc

Abstract: The present invention discloses a method for breeding Brassica napus varieties and materials with a double haploid induction line of rapeseed, including: 1) determining target traits of breeding restorer lines, maintainer lines and conventional varieties of Brassica napus; 2) crossing or convergently crossing two or more Brassica napus with the target traits; 3) pollinating the cross or back-cross progenies with the double haploid induction line of rapeseed; 4) identifying the stability of the induced progenies; 5) performing test-cross identification or yield and resistance identification on the stable progenies; and 6) forming stable restorer lines and maintainer lines for cross breeding combination or for forming conventional varieties.