The panicle seed setting rate is mainly confined by secondary branch seed setting rate, and they have significantly positive correlation.

• 结实率主要受控于二次枝梗结实特性，育种上要从结实率角度挖掘水稻的增产潜力，就要着重考虑选育二次枝梗结实率高进而结实率高的品种。