The present application is a method for selecting and breeding varieties of cruciferous vegetables by doubled haploid induction lines of Brassica napus, and 1) collecting resources of cruciferous vegetables, identifying and classifying them, and then sowing the induction lines Adjust to ensure consistency with the flowering stage, 2) pollinate cruciferous vegetables with an inducible strain, 3) bag-seal for inbreeding, or open the bud during the bud stage and force inbred. 4) Conduct stability assessment of strain lines, 5) Test-cross the stable strain lines and sterile lines, 6) Examine the degree of sterility of the test cross progeny and select and breed excellent maintenance lines, 7 ) Sterile strains of test cross progeny in the induction line are pollinated, 8) The reproductive potential of the induction progeny is investigated, and a new sterile line is subsequently pollinated with the sterility single strain in the induction line. Selection and breeding, 9) A test cross between sterile lines and maintenance lines, and new crosses To provide a method of selective breeding combinations. [Selected figure] Figure 1本願は、セイヨウアブラナの倍加半数体誘導系統によりアブラナ科野菜の品種を選抜育種する方法であって、１）アブラナ科野菜の資源を収集し、鑑定及び分類してから、誘導系統の播種時期を調節して開花期との一致を保証し、２）誘導系統でアブラナ科野菜を授粉し、３）袋掛けして近親交配させるか、或いは、つぼみ期につぼみを開いて強制的に近親交配させ、４）株系統の安定性鑑定を実施し、５）安定株系統と不稔系統を検定交雑し、６）検定交雑後代の不稔性度合を調査して優良維持系統を選抜育種し、７）誘導系統で検定交雑後代の不稔性株を授粉し、８）誘導後代の繁殖可能性を調査して、引き続き誘導系統で不稔性単一株を授粉することで新たな不稔系統を選抜育種し、９）不稔系統と維持系統を検定交雑して交雑の新たな組み合わせを選抜育種する方法を提供する。【選抜図】図１
