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《Chinese Journal of Rice Science》 2011-04
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Research Advances in Physiology of Super Rice under High-Yielding Cultivation

FU Jing,YANG Jian-chang(Key Laboratory of Crop Genetics and Physiology of Jiangsu Province,Yangzhou University,Yangzhou 225009,China)  
China launched a program for breeding of super rice or super hybrid rice by combining intersubspecific heterosis with ideal plant type in 1996.Today,about 80 super rice varieties have been released and some of them have achieved grain yields of 12-21 tons per hectare in field experiments.Compared with conventional cultivars,main reasons for high yield of super rice can be summarized as follows: more spikelets per panicle and larger sink size(number of spikelets per square meter);larger leaf area index,longer duration of green leaf area,higher photosynthetic rate and higher lodging resistance of culms;more matter accumulation before the heading stage,more remobilization of pre-stored carbohydrates from stems and leaves to grains during the grain filling period;and larger root system and greater root activity.However,super rice also has two major problems in production: poor grain-filling of the later-flowering inferior spikelets(in contrast to earlier-flowering superior spikelets),and low and unstable seed-setting rate.The research advances in cultivation physiology of super rice in respects of biological features,formation of yield components,population quality and physiological mechanisms were reviewed,and suggestion on further studies on super rice cultivation physiology were put forward.
【Fund】: 国家自然科学基金国际合作交流项目(31061140457);; 江苏省基础研究计划资助项目(BK2009005);; 教育部博士学科点基金资助项目(200811170002)
【CateGory Index】: S511
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