Purity-keeping production method of rapeseed with high content of oleic acid

The invention discloses a purity-keeping production method of rapeseed with high content of oleic acid, and belongs to the technical field of production of high-oleic rapeseed. The problem is solved that in the prior art, since undesired plants with low content of oleic acid are difficult to distinguish and remove in a production method of high-oleic rapeseed, the produced high-oleic rapeseed haslow purity. The cytoplasmic male-sterile line in Brassica napus Var. oleifera(Raphanus sativus L.) is adopted as a female parent, a mutant material of high-oleic rape is adopted as a male parent, multi-generation backcross is performed on hybrid plants and the male parent, and seed selection is performed so as to obtain a cytoplasmic male-sterile line in Brassica napus Var. oleifera(Raphanus sativus L.), a cytoplasmic male maintainer line in Brassica napus Var. oleifera(Raphanus sativus L.) and a cytoplasmic male restorer line in Brassica napus Var. oleifera(Raphanus sativus L.); and the phenotype of undesired plants