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Yield components and structures of sink source in super high yielding rice

Yang Huijie, Li Yizhen, Huang Yumin, Zheng Jingsheng, Jiang Zhaowei and Lin Wen (Rice and Wheat Research Institute of Fujian Academy of Agricultural Sciences, Fuzhou 350019)  
The yield components and structures of sink source at different grain yield levels in main cultivated varieties and hybrid combinations of rice in various periods were analysed and compared to study rice super high yield breeding and determine the main direction of genetically manipulating and culturally regulating the super high yield rice The results indicated:The structure character of super high yielding rice were sufficient panicle numbers and big panicles; The direction of super high yield breeding should focus on stabling panicle numbers, breeding big panicles, increasing the total grain numbers per unit area and enhancing rice productivity;Super high yielding culture should utilize the big panicle superiority of super high yielding rice varieties,firstly ensuring to get sufficent numbers of panicles suitable to local environment and then building a super sink rice population with ample larger panicles How to raise the sink capacity and materials productivity were also discussed.
【Fund】: 福建省自然科学基金
【CateGory Index】: S511.103
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