水稻特异株型恢复系R456的特征特性及其在杂交育种中的应用研究

The Characteristic of Special plant Restorer R456 and Its Utilization in High-bride Rice

水稻恢复系 R4 5 6是利用江西优质稻与贵州地方稻种资源“禾”杂交和强恢复系多系一号聚合杂交 ,经过多代的定向连续选择而成。用其配组的杂交组合有两优 4 5 6和汕优 4 5 6。其中两优 4 5 6已于 2 0 0 3年 7月通过了贵州省品种审定委员会审定、汕优 4 5 6已完成了两年的区域试验和一年生产试验。通过对水稻恢复系 R4 5 6及其杂交组合两优 4 5 6和汕优 4 5 6的剑叶卷叶指数 (RL I)、剑叶长度、一次枝梗数、二次枝梗数、剑叶角度、穗长、穗实粒数、有效穗、抗性、结实率和产量的分析 ,结果表明 :该恢复系具有配合力强 ,穗大粒多粒重 ,分蘖力中上等的特点 ,其配组的杂稻组合两优 4 5 6和汕优 4 5 6的抗性强 ,高产、稳产性好 ,适应性广。

Rice restorer R456 is a complicated cross Jiangxi good quality rice and Guizhou rice resource “He”with Duoxi No.1. It's combinations are Liangyou 456 and Sanyou 456, of which Liangyou 456 has been recognized by the Guizhou Variety Examination Committee. With the roll leaves index (RLI), boot leaves length (BLL), the first branch (FB), the second branch (SB), boot leaves angle (BLA), panicles length (PL), filled spikelets/panicles (FSP), panicles/667m2, tolerance and yield were analyzed. The results showed that the restorer has strong coordination, big panicle, heavy grain. It's combinations also have strong tolerance, high and stable yield and widespread adaptability.