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《Journal of Nuclear Agricultural Sciences》 2007-06
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BAO Gen-liang~1 ZHENG Tao~2 LUO Rong-ting~1 ZUO Xiao-xu~2 WANG Jun-min~1 YU Fa-ming~1 WU Yi-fang~1 (1.Institute of Crop Research and Atomic Energy Utilization,Zhejiang Academy of Agricultural Sciences,Hangzhou,Zhejiang 310021;2.Yuhang District Station for Extension of Seed and Techniques,Yuhang,Zhejiang 311100)  
The dried seeds of pure Japonica rice,line c.v.U5,with compact type panicle were irradiated by 200Gy()~(60)Co γ-rays.Based on the observation and selection in the following generations,a mutant with umbrella type panicle was developed,and named as ET2.Compared with its parent U5,ET2 showed obvious difference in panicle type,the angle of its primary rachis-branchs was enlargeed to about 30°~40°;unripen grains,chalky grain rate and chalkiness degree decreased by 41.8%,39.8% and 59.1%,respectively,and yield increased by 4.15%.The analysis on traits of grains in different part of panicle showed that in the bottom grains improvement of unripen grains and chalkiness were much better than in the iddle ones,and much better than in the top ones within the panicle.Induction of ET2 might be an effective way for improving quality of grain in japonica rice varieties with compact panicle.
【Fund】: 浙江省重大攻关“优质专用水稻新品种选育与产业化项目(011102471)”;; 浙江省04-06工程水稻品种改良攻关项目
【CateGory Index】: S511.22
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