Development and Utilization of the Restorer Lines Derived from Indica-Japonica Cross

The achievement and problems on breeding and utilization of the restorer lines derived from indicajaponica cross were analyzed in this paper.We believed that main parent of excellent indica restorer lines were crossed with japonica.The results indicated that the bred indica or partial indica restorer lines were showed wide affinity and strong combining ability to the indica male sterile line.There was relationship to some extent between the components of indica-japonica of restorer line and the effective panicles per plant,filed spikelets per panicle,1000-grain weight,grain weight per plant of its combinations.With the increasing of composition of Japonica for the restorer lines,the difficulty and efficiency of breeding would be greatly changed.