【摘要】 桂649是用多个籼粳材料的复交后代501为母本,以优质籼型恢复系桂99为父本进行杂交,经5 a 8代定向选育而成的水稻恢复系。该恢复系含粳稻亲缘,属偏粳类型,恢复力和配合力强,株叶形态优异,花粉量大,耐寒抗倒性好,后期秆青粒黄。与龙特浦A、Ⅱ-32A等不育系配组,杂种产量优势明显,熟期适中,其中特优649于2004年通过广西区农作物品种审定,至2005年底已累计推广种植8 433 hm2。更多还原

【Abstract】 The rice restorer line Gui 649 was developed from a cross between 501（a progeny of multiple indica/japonica hybridization） as the female and Gui 99（a fine quality indica restorer line） as the male through 5 years and 8 generations of selection.It has japonica genetic background with good plant type,heavy pollen load,good cold tolerance and lodging resistance and a desirable appearance at ripening stage.When it was crossed to different CMS lines such as Longtepu A and（Ⅱ-32 A）,the F₁ hybrids showed a good yield heterosis and a suitable growth duration.Of them,the hybrid Teyou 649 was certified and registered by Guangxi Zhuang Autonomous Region Committee for Registration of Crop Varieties in February,2004 and by the end of 2005,it had been planted to an accumulative area of 8 433 hectares.更多还原