Identification of rice indica-compatible japonica lines.

Development of indica-compatible japonica lines(ICJLs) is one of the promising ways to exploit the heterosis between indica and japonica rice by overcoming the F1 hybrid sterility and to raise rice yield.In the present study,88 microsatelite markers were used to analyze the genetic polymorphism of 42 can-didate ICLJs.According to the standard of Dj value classification method,18 of the 42 candidate ICLJs belonged to quasi-japonica group.The compatibility of the 13 candidate ICLJs with quasi-japonica characteristics were identified with 4 indica and 4 japonic testers.The results showed that 11 of the 13 lines were conformed to the criterion of ICJLs,5 of which belonged to exceptionally indica-compatible quasi-japonica lines while 6 lines belonged to wide-compatible quasi-japonica lines.