中文摘要：

以江苏省近年来主要推广的17份粳稻品种为材料,分析其穗部性状及其与产量的关系。结果表明：① 17个粳稻品种各穗部性状的变异系数为7.85%-18.41%,其中二次枝梗数、总枝梗数、二次枝梗粒数是影响最终穗粒数的主要因素。②采用类平均法将17个粳稻品种分为3个类群,这3个类群在产量性状上的差异较大,以第I类群单穴产量最高,表现为每穗实粒数和单穗重高于Ⅱ、Ⅲ类群,而单穴有效穗、结实率、千粒重、充实度则相反。③一次枝梗数、二次枝梗数、总枝梗数、一次枝梗粒数、二次枝梗粒数、总粒数、着粒密度与单穴有效穗、结实率呈显著或极显著负相关,与每穗实粒数、单穗重、单穴产量呈显著或极显著正相关。千粒重与二次枝梗粒数呈显著负相关外,与其他穗部性状均无显著相关性。

英文摘要：

With 17 Japonicarice varieties in Jiangsu province as materials the panicle traits and its relationship with yield components were studied.The results showed that the coefficient of variation of panicle traits of 17 Japonicarice varieties ranged from 7.85%to 18.41%.The second branches,total branches and secondary branch grain number were the main factors affected the final grains per panicle.By using he average linkage,17 Japonicarice varieties were divided into 3groups.The yield per plant,filled grain number and weight per panicle of Group I were higher than those of GroupⅡand Ⅲ,but the efficient panicle,seed setting rate,1000-grain weight and grade of filled grain were opposite.The primary branches,secondary branches,total branches,primary branch grain number,secondary branch grain number,total grain number,grain density per panicle were significantly and negatively correlated with the efficient panicle and seed setting rate,but were significantly and positively correlated with the filled grain number,weight per panicle and yield per plant.The 1000-grain weight was significantly and negatively correlated with the secondary branches per panicle,and was not significantly correlated with other panicle traits.