【摘要】 搜集和整理了我国“六五”以来，１５ａ 间国内育成的６３ 个单、双低优势油菜新品种主要细胞质来源和遗传背景，并针对选育过程中存在的一些问题进行了探讨分析。这对于防止因遗传背景狭窄，细胞质过分单一而可能造成的产量、抗性水平降低等问题，有一定的借鉴和指导意义。更多还原

【Abstract】 The main genetic background of 63 rapeseed varieties with Low conlain of erucic acid or glucosinolates or the both bred in China since the Sixth Five year Plan were analysed.It was significant in avoiding some problems of low yield and resistant level due to the limited germplasm resources and single cytoplasm.更多还原