水稻穗部性状及其与产量相关分析

以辽宁省最新育成的水稻品种(品系)为研究对象,分析了水稻穗部性状间及其与产量的关系,结果如下。产量与每穗粒数、着粒密度、二次枝梗数、二次枝梗粒数、二次枝梗粒率呈极显著的正相关关系,这些性状对产量都有积极意义,产量是其综合作用的表现。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。一次枝梗数、一次枝梗粒数、二次枝梗数、二次枝梗粒数以及二次枝梗粒率都与每穗粒数呈极显著的正相关关系,这些性状的增加将有助于穗粒数的增加。穗粒数与二次枝梗粒数随品种的变化是一致的,二者有极显著的线性相关。提高千粒重有可能进一步挖掘水稻的增产潜力。

Analysis on Correlation between Rice Panicle Traits and Yield

This study analyzes the relation between rice panicle traits and between yield and them,by using varieties bred lately in Liaoning Province.The results are as follows: Grain number per panicle,seed density,secondary branch number,secondary branch grain number,secondary branch grain rate are significantly positively correlated with rice yield,& the yield is affected by all of them.The panicle seed setting rate is mainly confined by secondary branch seed setting rate,and they have significantly positive correlation.Primary branch number,secondary branch number,primary branch grain number,secondary branch grain number and secondary branch grain rate are significantly positively correlated with grain number per panicle.There is a significantly linear relation between secondary branch grain number and grain number per panicle,and they have the same changing tendency.In addition,increasing of 1 000-grain weight is important in rice's potential yield.