Abstract: Quanhua No.9,bred by Quanzhou Institute of Agricultural Sciences,was released by Fujian Provincial Crops Approval Committee in 2009.It displayed many desirable traits including high yield potential,yield stability and O/L ratio.The variety also showed many good growth and development characteristics,such as short blooming period,high leaf area index,high net assimilation rate,high dry matter accumulation,large sink,wide source and desirable sink/source relationship.