杂交稻新恢复系HR195的选育与应用

Breeding and Utilization of New Restorer HR195 of Hybrid Rice

新恢复系ＨＲ１９５是用早熟早籼品种与多个迟熟恢复系杂交，经定向培育而成的含有早熟基因的迟熟恢复系，具有下列特点：（１）自身表现迟熟，但所配系列组合表现早熟，这在其他迟熟恢复系中是少见的；（２）恢复力强；（３）杂种优势明显。ＨＲ１９５系列组合农艺性状优良，中抗稻瘟病、适应性较广，将早熟性和丰产性结合较好，适于多熟制地区的需要。

HR195, derived from multiple crosses of one early variety (Erjiuqin) and three late restorers (Taiyin 1, N Dao and Minghui 63), was developed by way of directional transferring of early gene maturity into late restorer. Its characteristics are: ①It is late in maturity, but its hybrids show earlier maturity, which occurs very scarcely in the existing late restorer lines. ②It has strong restoring ability with the seed set of its combinations above 85%～90% in general. ③Its hybrids show great heterosis. The grain yield of its combinations are between 7.5～8.5 t/hm 2 in general, 5%～15% higher than the controls.④The combinations of HR195 also show good agronomic characters, moderate resistance to blast and wide adaptability.