In order to investigate the distribution of quality parameters of rapeseed in Tibet,explore the quality difference between rapeseeds from Tibet and Yangtze River basin,and clarify the advantageous indexes of rapeseed from Tibet,for selecting high-sterol varieties,we analyzed the oil content,fatty acid and phytosterol content of 31 samples from Tibet and 448 samples from Yangtze River basin in 2021.The results indicated that the average oil content of rapeseeds from Tibet is significantly higher than that of rapeseeds from Yangtze River basin,while the av-erage phytosterol content of rapeseeds from Tibet is significantly lower than that of rapeseeds from Yangtze River ba-sin.Because the sterol content in rapeseed is negatively correlated with erucic acid content,low erucic acid rape-seed was selected in 2022 to verify that the substandard erucic acid is an important cause of the lower average sterol content of rapeseed from Tibetan region than that of rapeseeds from Yangtze River basin,and the double low rape-seed varieties with higher oil content than that in Yangtze River basin and all higher sterol content were screened,including Xinyou 20,Qingxiangyou 168,Xinyou 17 and Zangyou 12,which can be taken as high sterol rapeseed va-rieties,which are of great significance to improve the overall quality of rapeseed and support the consolidation and expansion of the achievements of poverty elimination.
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