Stem rot caused by Sclerotinia sclerotiorum is a major yield-limiting factor in canola production.In this study,resistances to S.sclertiotum of a RIL population were identified using three identification methods.Correlation coefficients among the three methods were significantly positive,and among multi-environments in field natural infection were also positive (P＜0.01).The flowering time was negatively and significantly related with disease index in all the environments.