小麦高产品种籽粒灌浆与粒重的关系

以黄淮麦区13个具不同产量结构特征的高产品种（系）为试材，探讨了籽粒生长3个阶段的持续时间、灌浆速率和干物质积累量，及其与粒重的关系。结果表明：籽粒的灌浆速率和干物质积累量在籽粒生长各阶段均存在显著的品种间差异；籽粒灌浆速率，特别是第2阶段灌浆速率对籽粒增重有重要影响，是籽粒增重的决定因子；千粒重与第2阶段灌浆速率呈极显著的正相关，第2阶段灌浆速率显著增高是大粒品种的重要特征。饱满度在65％以上籽粒饱满，在45％以下籽粒秕瘦。

Relationship of Grain-filling and Grain Weight in High-yield Wheat Varieties

In this paper, the ralationship of grain-filling and grain weightwas analysed about 13 high-yeild wheat varaties in Huanghui plain. The result showed that the grain-filling rate and amounts of dry matter accumulation were significantly different bettyeen the varieties at each stage, and the grain weight depended on the grain-filling rate, especially on the grain-filling in 2nd stage which was the determinant facter of the grain weight increased. There was significantly correlation coefficients between 1000-kernel weight and the grain-filling rate in 2nd stage. Which was also the important character of big kernel varieties. It was good grain plumpness above 65%,but bad below 45%.