用聚丙烯酰胺凝胶电泳法对５种杂交稻及其亲本和１０种常规稻之间的酯酶同工酶谱研究表明，５种杂交稻种子均具９Ａ（Ｒ＿ｆ＝０，６１８）特征带，１０种常规稻绝大多数不具此带。杂交稻亲本表现较强的２Ａ（Ｒ＿ｆ＝０．６４３）和３Ａ（Ｒ＿ｆ＝０．５４３）酶带。萌发生长８～１８天的汕优６３稻苗具活性较强而稳定的１２Ａ（Ｒ＿ｆ＝０．５４３）酶带。萌发生长８～１８天的汕优６３稻苗具活性较强而稳定的１２Ａ（Ｒ＿ｆ＝０．３１２）特征带，此带在汕优２２中活性较弱，而岗优１２，岗优２２和Ⅱ优６３均无此带，这可能是汕优系列杂交稻与其它系列杂交稻的特征差异之一。 Esterase isoenzymes of 5 hybrids and their parents and 10 conventional rice varieties by polyacrylamide gel electrophoresis showed that all 5 hybrid rice seeds had a characteristic band (R_f = 0,618) , The vast majority of 10 kinds of conventional rice do not have this belt. The hybrid rice showed strong 2A (R_f = 0.643) and 3A (R_f = 0.543) bands. The rice seedlings of Shanyou 63 with germination of 8 ~ 18 days had strong and stable 12A (R_f = 0.543) bands. The seedlings of Shanyou 63 with germinating growth of 8 ~ 18 days had strong and stable characteristic bands of 12A (R_f = 0.312). The bands were weakly active in Shanyou 22, but Gangou 12, Gangou 22 Ⅱ You 63 are without this belt, which may be Shanyou series hybrid rice and other series of hybrid rice characteristics of one of the differences.