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采用粒形和稃面双峰乳突多性状判别 ,两优信粳系列组合被定位为O型二向演化态粳稻 ,6 5 396为A型分化态籼稻。由此 ,肯定了以典型粳稻做父本 ,直接与培矮 6 4S等同类中间型核不育系杂交配组 ,选育两系亚种间强优势杂交粳稻的育种途径 ;并提出 ,从古老的原始稻种中寻找二向演化类型作为两用核不育系的育种材料 ,可能是最佳途径
The polymorphic combinations of Liangyouxinjing were identified as O-shaped two-way evolutionary japonica rice, and 6 5 396 as A-type differentiation indica rice. Thus, it was confirmed that the breeding method of breeding japonica rice with strong heterosis, such as the typical japonica rice parent and the direct hybridization with Pei’ai 6 4S and other middle-type genic male sterile lines, Of the original rice species looking for two-way evolutionary type as a dual-genic male sterile line of breeding material may be the best way