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After years of selection,Su 9905,a new rapeseed strains with high yield,double low,blast resistance,lodging resistance has been obtained from the crossing between Suyou 1(female) and 8705(male).The results of two years regional tests in Jiangsu Province showed that the average yield achieved 2775.01kg/hm2 which increased 5.84％compared with CK.Its crucic acid content is 0.18％,total glucosinolate content of rapeseed meal is 21.41μmol/g,oil content is 43.3％.It had compact plant type,strong lodging resistance and good disease resistance.It was examined and approved as Suyou 7 by Jiangsu Provincial Variety Examination and Approval Committee in 2012.