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《Fujian Journal of Agricultural Sciences》 2002-04
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Determination factor for super-high yield of rice

YANGHui-jie, YANG Ren-cui, LI Yi-zhen, ZHENG Jing-sheng, JIANG Zhao-wei(1. Institute of Genetics and Crop Breeding, Fujian Agricultural and Forestry University,Fuzhou, Fujian 350002, China; 2-Institute of Rice and Wheat, Fujian Academyof Agricultural Sciences, Fuzhou, Fujian 350019, China)  
Super-high yielding rice cultivars which were newly bred in China were exemined respectively in Taoyuan of Yunnan and Longhai of Fujian. The results indicated the yield was not correlated with single yield component factor, it was very significantly positive correlation with the sink size (panicle number X grain number per panicle X grain weight). Super-high yielding ricecultivars appeared diversity of yield components due to cultivar type's; However, their same characteristic was larger sink size. The yield was not significantly correlated with harvest index, very significantly correlated with biomass. Super-high yielding rice had accumulative superiority of biomass and higher colong growth rate (CGR) at the middle and late growth stages. These results showed larger sink size and higher biomass were the determinants for super-high yield of rice.
【Fund】: 中华农业科教基金、福建省超级稻研究及福建省自然科学基金资助项目部分内容(C96055).
【CateGory Index】: S511
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