BEAK-SHAPED GRAIN 1/TRIANGULAR HULL 1,a DUF640 gene,is associated with grain shape,size and weight in rice

查看全文 作　　者：YAN [1]DaWei;ZHOU [2]Ya;YE [2]ShengHai;ZENG [1]LongJun;ZHANG [2]XiaoMing;HE [1]ZuHua

机构地区：[1]National Key Laboratory of Plant Molecular Genetics,Institute of Plant Physiology and Ecology,Shanghai Institutes for Biological Sciences,Chinese Academy of Sciences;[2]State Key Laboratory Breeding Base for Zhejiang Sustainable Pest and Disease Control,Institute of Crop and Nuclear Technology Utilization,Zhejiang Academy of Agricultural Sciences

出　　处：《Science China(Life Sciences)》索引2013年第56卷第3期,共9页

基　　金：supported by grants from the Chinese Academy of Sciences (KSCX2-EW-N-01);the National Natural Science Foundation of China (31100142,31071207) 摘　　要：Grain shape and size both determine grain weight and therefore crop yield.However,the molecular mechanisms controlling grain shape and size are still largely unknown.Here,we isolated a rice mutant,beak-shaped grain1(bsg1),which produced beak-shaped grains of decreased width,thickness and weight with a loosely interlocked lemma and palea that were unable to close tightly.Starch granules were also irregularly packaged in the bsg1 grains.Consistent with the lemma and palea shapes,the outer parenchyma cell layers of these bsg1 tissues developed fewer cells with decreased size.Map-based cloning revealed that BSG1 encoded a DUF640 domain protein,TRIANGULAR HULL 1,of unknown function.Quantitative PCR and GUS fusion reporter assays showed that BSG1 was expressed mainly in the young panicle and elongating stem.The BSG1 mutation affected the expression of genes potentially involved in the cell cycle and GW2,an important regulator of grain size in rice.Our results suggest that BSG1 determines grain shape and size probably by modifying cell division and expansion in the grain hull. 关键词：颗粒形状调节基因三角形晶粒船体水稻重量鸟

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BEAK-SHAPED GRAIN 1/TRIANGULAR HULL 1,a DUF640 gene,is associated with grain shape,size and weight in rice

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