In 1998, a sterile mutant plant was observed in apetalous lines in B. napus L, and an apetalous mutant sterile (AMS) line was established from this plant.

• 摘要1998年在自选的甘蓝型无花瓣油菜株系中发现了一种突变不育株，进而育成无花瓣油菜突变不育系（简称AMS）。