The present invention relates to a method for breeding a novel plant variety of high fertility xBrassicoraphanus with stabilized seed productivity, and discloses a method for breeding a novel plant variety of xBrassicoraphanus, which involves performing a mutagen treatment on xBrassicoraphanus seeds by treating the xBrassicoraphanus seeds with 0.01 µg/L of mutagen NMU, sowing the xBrassicoraphanus seeds, gathering the xBrassicoraphanus seeds, sowing the xBrassicoraphanus seeds again, performing artificial crossing in an indoor area to check seed productivity, and checking the uniformity of the variety using an AFLP primer.
