小粒型优质野败不育系绮A的选育与应用

Breeding and Application of WA-type Small Grain CMS Line Qi A in Rice

绮A是广西农科院水稻所育成的极小粒型野败不育系 ,千粒重仅 14g ,具有败育彻底 ,异交习性良好 ,可恢性好 ,配合力高 ,外观品质好等特点。 2 0 0 1年 10月通过广西区科技厅成果鉴定。所配组合表现米质优、优势强、产量高、熟期偏中迟。绮优 10 2 5、绮优 99和绮优 2 93等优质早籼组合的配组成功 。

Qi A is a WA type small grain CMS line in rice with only 14g of 1 000 grain weight. It is characteristic of complete sterility, high outcrossing rate, strong restorability, good combining ability and fine grain quality. It was registered in Guangxi in October, 2001. Its F 1 hybrids showed strong heterosis, medium-late maturity and high grain quality. The problem of poor grain quality of early season hybrids in South-China might be solved by the successful development of high grain quality combinations such as Qiyou 1025, Qiyou 99 and Qiyou 293, the hybrids derived from Qi A.