利用水稻早世代稳定特性选育杂交水稻恢复系

Utilizing Early Generation Stability Characteristic to Breed Restorer Line of Hybrid Rice

利用早世代稳定水稻品系与骨干恢复系杂交,在F2群体中获得早世代稳定株系3个,通过分子标记辅助选择明确了2个株系具有可恢性。经过测配F1花粉育性检测,其中1个株系恢复力强,2个测配组合产量优势明显。采用此方法获得杂交水稻恢复系仅需1-2年时间,比传统方法的5-8年明显缩短。

Screening elite restorer lines is one of the key points to improve the grain yield and rice quality in hybrid rice breeding. The traditional method of the restorer line breeding is characterized by time-consuming and low efficiency; and it should take 5 to 8 years to get a restorer line. By crossing the early generation stability rice with an important restorer line Shuhui 527, three stable lines （2371, 409 and 2441） were obtained in F2 populations. Meanwhile, the restoration of the two lines （2371 and 409） were confirmed by molecular marker assisted selection （MAS）. It was found that line 2371 had strong restoration ability and its two hybrid combinations showed obvious heterosis. The method by utilization of early generation stability characteristic and MAS showed time-saving （1-2 years） and high efficiency for breeding a new restorer line.