辽宁省部分中熟水稻品种穗部性状与结实特性分析

以辽宁省最新育成的水稻品种(品系)为试材,把参试品种分为高产品种、中产品种和低产品种三类,分析了不同产量水平水稻品种穗部性状及其结实特性,结果表明,高产品种具有较高的每穗粒数、二次枝梗粒数、一次枝梗粒数、以及较高的二次枝梗粒率,具有较高的结实率、二次枝梗结实率、一次枝梗结实率,具有较高的一次枝梗数、二次枝梗数,使穗粒结构得到较大程度的协调,以致其产量处于较高的水平。

Study on Rice Panicle Traits and Seed Setting Characteristics at Different Yield Levels

This study classifies rice varieties bred lately in Liaoning province into three yield levels,that is,high yield varieties,medium yield varieties and low yield varieties,and analyzes rice panicle traits,seed setting characteristics at different yield levels.The result shows:High yield varieties have greater grain number per panicle,greater secondary branch grain number,greater primary branch grain number and higher secondary branch grain rate.The high yield vari- eties also have higher seed setting rate made up of higher secondary branch seed setting rate together with higher pri- mary branch seed setting rate,and have greater secondary branch number and greater primary branch number.Therefore, high yield varieties have more rational panicle compositions resulting in higher yield.