水稻骨干恢复系R21及改良系嘉恢825在育种中的利用

摘要

R21是四川省嘉陵农作物品种研究中心、四川中正科技有限公司与西南农业大学合作，采用穗茎注射法，将高粱DNA导入受体晋恢1号，经过四川、海南、广西异地穿梭选择、加代鉴定方法培育的高配合力、广恢复谱的籼型骨干恢复系；嘉恢825是四川省嘉陵农作物品种研究中心从骨干恢复系R21中选择单株，经单株混种群体选择育成的较R21更优的恢复系。用不育系富4A、辐74A、Ⅱ-23A作母本与恢复系R21配制杂交组合，用冈46A、正67S、培矮64S作母本与嘉恢825配制杂交组合，分别参加国家水稻区试并通过审定，育成的主要品种有富优1号、富优21、辐优21、冈优825、正两优825（已通过国家区试）、两优825（2014年国家区试续试）。已育成且经审定的水稻新品种在大面积生产中得到了较好的应用。%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 re-searched and developed by Sichuan Provincial Jialing Crop Varieties Research Center, through selecting the single plant from the ex-cellent 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 restor-er R21, using Gang 46A, Zheng 67S, Peiai 64S as the female parent combining with Jiahui 825, are approved through series of experi-ment separately. The main varieties had been bred as follows:Fuyou No.1, Fuyou 21, Gangyou 825, Zhengliangyou 825(had been ap-proved 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.