关键词: 水稻, 骨干恢复系, R21, 改良系, 嘉恢825

Abstract: R21 is an indica rice restorer with broad restoring spectrum and high combining ability, bred by Sichuan Provincial Jialing Crop Varieties Research Center, Sichuan Zhongzheng Science and Technology Co., Ltd. and Southwest Agricultural University, by the way of earstem injecting, implanting the DNA of sorghum into the receptor Jinhui No.1.  Jiahui 825 is a more optimized restorer researched and developed by Sichuan Provincial Jialing Crop Varieties Research Center, through selecting the single plant from the excellent plant of key restorer R21, by breeding group selection of single plant of mixed varieties, and it has better performances than R21. The hybrid groups by using the varieties of sterile lines Fu 4A, Fu 74A, Ⅱ-23A as the female parent combining with the restorer R21, using Gang 46A, Zheng 67S, Peiai 64S as the female parent combining with Jiahui 825, are approved through series of experiment separately. The main varieties had been bred as follows: Fuyou No.1, Fuyou 21, Gangyou 825, Zhengliangyou 825（had been approved by the state for regional experiment）, Liangyou 825（the experiment being carried out at state level in 2014）. The varieties have been appropriately applied in the mass production. 

Key words: rice, key restorer, R21, modifier restorer, Jiahui 825