亚种间重穗型杂交稻冈优881的选育与应用

首先用密阳４６作母本与明恢６３杂交选育出恢复系６３２３；然后从恢复系６３２３与粳稻天然杂交后代选育成籼粳亚种间重穗型恢复系蜀恢８８１，其穗平重可达４．３１ｇ，它与三系不育系冈４６配组，培育出了籼粳亚种间重穗型杂交稻强优势组合冈优８８１。该组合产量高，米质好，抗瘟性强，适应性广，１９９５年５月通过四川省品种审定。

Breeding and Application of Heavy panicle Intersubspecific Hybrid Rice Gangyou 881

Shuhui 881, a heavy panicle indica japonica rice restorer line, is developed from the natural hybrid between the restorer line 6323, which is derived from the cross of two strong restorers Milyang 46 and Minghui 63, and japonica rice. The panicle weight of Shuhui 881 is 4.31 g on an average. Gangyou 881 is an intersubspecific hybrid with strong heterosis developed from crossing it to the CMS line Gang 46A. The combination is characteristic of high yield, good grain quality, resistance to rice blast and wide adaptability. It was certified in Sichuan in May 1999. The main points of its cultural management and hybrid seed production techniques were briefly introduced.