优质抗病恢复系广恢998的选育及其组合的推广应用

Breeding of Restorer Line Guanghui 998 with Good Grain Quality and Blast Resistance and the Extension and Utilization of its Hybrid Combinations

引进具有不同遗传背景、亲缘较远、优缺点互补的常规稻与杂交稻恢复系进行杂交、复交,再通过多世代、不同生态条件下的系统选择和鉴定筛选,培育出配合力好、恢复力强、恢复谱广、穗数多、品质优、稻瘟病抗性好、适应性广的优良三系恢复系广恢998。利用广恢998与生产上广泛应用的不育系测交,组配成16个杂交稻组合应用于生产。广恢998系列组合具有穗数多、高产稳产、品质优良、稻瘟病抗性好、适应性广等特点,在全国累计推广面积达514万hm2,增加经济效益209.50亿元,为我国水稻生产发展和粮食安全作出了重大贡献。

Restorer line Guanghui 998 was bred by Rice Research Institute, Guangdong Academy of Agricultural Sciences, which has the characteristics of high combining ability, strong restorability, broad restoring spectrum, high panicle number, good grain quality, high blast resistance and wide adaptability. 16 hybrid combinations have been formed with Guanghui 998 as a parent, these hybrid combinations showed the characteristics of more panicle number, high and stable yield, good grain quality, high blast resistance and wide adaptability. The accumulated extension area of these hybrid combinations reached 5.14 million hectare, increased benefit of 20.95 billion Yuan.