籼糯稻品种的产量构成特征和库源特性研究

为了阐明籼糯稻品种的高产限制因子和产量潜力,以原南方主栽的籼糯品种早糯717为对照,分析高产籼糯品种的产量构成特征和库源流特性。结果表明:杂优糯稻组合特优63糯高产的主要原因是生物产量高、库容量大,而未能充分发挥其高产潜力的原因是后期功能绿叶面积下降幅度快,干物质转化效率较低;籼糯稻高产育种,应朝着提高生物产量、提高每穗粒数方向开展,同时还要注重选择后期能维持较高绿叶面积且经济系数较高的株系。

Research on Yield Components and Source-sink Characteristics of Indica Glutinous Rice

Yield components and source-sink characteristics of high-yielding indica glutinous rice varieties were analyzed with "Zaonuo 717"(a major indica rice variety in the southern China ago) as CK.The results indicated that the main causes of high yield in the hybrid glutinous rice combination "Teyou 63" were high biomass and large sink size,not achieving its yield potential was caused by the fast decrease of the area of functional green leaf at later stage and low transformation efficiency of dry matter.In order to breed high-yielding glutinous rice varieties,increasing biomass and grain number per spike,and selecting the plants with larger green leaf area at later stage and higher economic indexes are suggested.