GS6, A Member of the GRAS Gene Family,Negatively Regulates Grain Size in Rice

编号 zgly0001461305

文献类型 期刊论文

文献题名 GS6, A Member of the GRAS Gene Family,Negatively Regulates Grain Size in Rice

作者 Lianjun Sun  Xiaojiao Li  Yongcai Fu  Zuofeng Zhu  Lubin Tan  Fengxia Liu  Xianyou Sun  Xuewen Sun  Chuanqing Sun 

作者单位 State Key Laboratory of Plant Physiology and Biochemistry  National Center for Evaluation of Agricultural Wild Plants (Rice)  MOE Key Laboratory of Crop Heterosis and Utilization  Key Laboratory of Crop Genetic Improvement  Department of Plant Genetics an 

母体文献 Journal of Integrative Plant Biology 

年卷期 2013年10期

年份 2013 

分类号 S511 

关键词 Domestication  GS6  grain size  haplotype  Oryza sativa  rice. 

文摘内容 Grain size is an important yield related trait in rice.Intensive arti cial selection for grain size during domestication is evidenced by the larger grains of most of today’s cultivars compared with their wild relatives.However,the molecular genetic control of rice grain size is still not well characterized.Here,we report the identi cation and cloning of Grain Size 6(GS6),which plays an important role in reducing grain size in rice.A premature stop at the t348 position in the coding sequence(CDS)of GS6 increased grain width and weight signi cantly.Alignment of the CDS regions of GS6 in 90 rice materials revealed three GS6alleles.Most japonica varieties(95%)harbor the Type I haplotype,and 62.9%of indica varieties harbor the Type II haplotype.Association analysis revealed that the Type I haplotype tends to increase the width and weight of grains more than either of the Type II or Type III haplotypes.Further investigation of genetic diversity and the evolutionary mechanisms of GS6showed that the GS6gene was strongly selected in japonica cultivars.In addition,aggcrepeat region identi ed in the region that encodes the GRAS domain of GS6 played an important historic role in the domestication of grain size in rice.Knowledge of the function of GS6might aid efforts to elucidate the molecular mechanisms that control grain development and evolution in rice plants,and could facilitate the genetic improvement of rice yield.