Natural variations in grain length 10(GL10)regulate rice grain size

作     者：Penglin Zhan Shuaipeng Ma Zhili Xiao Fangping Li Xin Wei Shaojun Lin Xiaoling Wang Zhe Ji Yu Fu Jiahao Pan Mi Zhou Yue Liu Zengyuan Chang Lu Li Suhong Bu Zupei Liu Haitao Zhu Guifu Liu Guiquan Zhang Shaokui Wang Penglin Zhan;Shuaipeng Ma;Zhili Xiao;Fangping Li;Xin Wei;Shaojun Lin;Xiaoling Wang;Zhe Ji;Yu Fu;Jiahao Pan;Mi Zhou;Yue Liu;Zengyuan Chang;Lu Li;Suhong Bu;Zupei Liu;Haitao Zhu;Guifu Liu;Guiquan Zhang;Shaokui Wang

作者机构：Guangdong Laboratory for Lingnan Modern AgricultureGuangzhouGuangdong 510642China State Key Laboratory for Conservation and Utilization of Subtropical Agro-BioresourcesGuangdong Provincial Key Laboratory of Plant Molecular BreedingSouth China Agricultural UniversityGuangzhouGuangdong 510642China Department of Plant SciencesUniversity of OxfordOxford OX13RBUK 

出 版 物：《Journal of Genetics and Genomics》 (遗传学报（英文版）)

年 卷 期：2022年第49卷第5期

页      面：405-413页

核心收录：

学科分类：0710[理学-生物学] 09[农学] 0901[农学-作物学] 

基　　金：supported by the National Natural Science Foundation of China (32072040, 31622041) the Key Projects of Basic Research and Applied Basic Research of Guangdong Province(2019B030302006) 

主　　题：Rice GL10 OsMADS56 Grain length SSSL GA 

摘      要：Grain size is an important determinant of grain weight and yield in rice.Although several genes related to grain size have been identified,natural variations in these genes that affect grain size are poorly characterized.Here,we describe the grain length QTL GL10,encoding MADS56,which positively regulates grain length and grain weight.A natural allelic variation of NIL-gl10,containing an~1.0-kb deletion in the first exon that abolishes its transcription,results in shorter grain length,lower grain weight and delayed flowering in gl10 plants.The knockout of GL10 in the HJX74 background leads to grain phenotypes similar to that of NIL-gl10,while overexpression of GL10 results in increased grain length and weight and earlier heading date.GL10 regulates grain length by promoting greater longitudinal cell growth in the grain glume.Additionally,GL10 participates in the regulation of gibberellic acid(GA)signaling pathway genes in young panicle tissues.Analysis of GL10 haplotypes shows obvious divergence between the japonica and indica lineages.Our findings reveal an allelic variation of GL10 that may explain differences in grain length among modern cultivars and could be used to breed rice varieties with optimized grain shape.