空间诱变水稻广谱恢复系航恢七号的选育及利用

BREEDING OF "HANGHUI NO.7",A WIDE RESTORER LINE OF RICE BY SPACE MUTATION AND ITS UTILIZATION

航恢七号是利用航天育种技术,将特籼占13纯系干种子经返回式卫星搭载15d后,从地面种植的空间诱变处理后代群体中选育出的优良恢复系。它具有农艺经济性状好、恢复力强、恢复谱广、配合力好、花粉量大、制种产量高等特点。航恢七号与两系光温敏核不育系及三系胞质雄性不育系组配的一系列杂交水稻新组合表现出较强的杂种优势,其杂种培杂航七已通过广东省品种审定。

Hanghui No. 7 was selected from rice Texianzhan 13, which was carried into space with retrieved satellite for 15 days. Hanghui No. 7 was a new restorer line with good agronomic and economic characters, strong restoring ability, and so on. It was exhibited a series stronger restoring ablity, when hybrided to photoperiod-temperature sensitive mucleic male sterility lines and cytoplasmic male sterile lines of three-line, and the hybrid combinations appeared powerful competition heterosis of F1 hybrid compared with the control Peizashuang 7. A new hybrid combination Peizahang 7 （Peiai 64S × Hanghui No. 7） was examined and released by Guangdong Provincial Committee of Crops Variety Examination in 2005.