Oils having very high levels of oleic acid have superior stability and are valuable for frying and other high temperature applications. Oils with equal proportion of palmitic acid, oleic acid, stearic acid, namely, the POS type oil may be suitable starting material for the development of cocoa butter substitute. Our project aims to produce cottonseed oil with elevated levels of stearic and/or oleic acid by means of antisense inhibition of both the 11.9 stearoyl-ACP and microsomal ro-6 desaturase genes.