Abstract: The Yahui 420 which was bred from the cross of Minghui 76 with Warylowa was a wide compatibility restorer line.The combination which were combined with Zhenxian 97A LTPA and 13565 testcross Yahui 420, showing significant heterosis on biological and economical with large panicle and ed seed set persent.The averaged grain yield come to 8.3 t/hm2 which was 20% higher by CK (Shanyou 63).The yeild had arrived to intersubspecific level.