The effect of transgenic restorer lines on agronomic traits of F1 hybrid rice.

Eight restorer lines of hybrid rice,by which transferred with antifungal protein genes using biolistic bombardment,were chosen to estimate the effect of transgenic restorer lines on agronomic traits of F_1 hybrid rice by the way of incompleted diallel cross with three male-sterile lines.The result obtained showed that,all of agronomic traits of F_1 hybrid rice were obviously affected by transgenic restorer line.Heterosis of transgenic hybrid is widespread and various for different traits in a variety or different varieties in the same trait,they also revealed that heterosis is different fairly in transgenic hybrids whose originated from different non-transductive original cultivars.Coefficients of correlation in the same trait between transgenic restorer lines and F_1 hybrid rice,such as plant height,flag leaf length,flag leaf width,panicle length,number of panicles and 1000-grain weight were positively significant at 0.01 or at 0.05 level,indicated that selecting parents on main agronomic traits reasonably is very important to improving the efficiency of hybrid rice breeding.