“自生”油菜,是指在头年种过油菜的地里,来年秋冬不经人工播种而自己生长出来的油菜。过去在油菜良种繁育中,为防止品种混杂退化,只注意了虫、风引起“串花”混杂,而没有注意到自生油菜对品种纯度的影响。这是搞好油菜良种提纯复壮,防止品种混杂退化,特别是“双低”(低芥酸、低硫葡萄糖甙)油菜品种的培育和生产上急需引起重视的现实问题。据瑞典的调查,该国低芥酸油菜“辛纳斯”,1971年第一次播种,连续种植5年,其芥酸含量为8—12%。但是生产上,它的芥 “Self-generated” rape refers to the rapeseed that grows in the autumn and winter without artificial sowing in the first year of planting rapeseed. In the past in the rapeseed breeding, in order to prevent the hybrid degeneration, only pay attention to insects, the wind caused by “string flowers” mixed, but did not notice the inherent rapeseed variety purity. This is a good rapeseed seed purification and rejuvenation, to prevent the degradation of hybrid varieties, especially “double low” (low erucic acid, low glucosinolates) rapeseed varieties of cultivation and production of urgent need to pay attention to the practical problems. According to a survey conducted in Sweden, the country’s low erucic acid “Sinas” was first planted in 1971 and planted for 5 years with an erucic acid content of 8-12%. But production, it’s mustard