The wheat sucrose synthase gene TaSus1 is a determinant of grain number per spike  

作　　者：Liping Shen Lili Zhang Changbin Yin Xiaowan Xu Yangyang Liu Kuocheng Shen He Wu Zhiwen Sun Ke Wang Zhonghu He Xueyong Zhang Chenyang Hao Jian Hou Aoyue Bi Xuebo Zhao Daxing Xu Botao Ye Xuchang Yu Ziying Wang Danni Liu Yuanfeng Hao Fei Lu Zifeng Guo 

机构地区：[1]Key Laboratory of Plant Molecular Physiology,Institute of Botany,Chinese Academy of Sciences,Beijing 100093,China [2]China National Botanical Garden,Beijing 100093,China [3]State Key Laboratory of Plant Cell and Chromosome Engineering,Institute of Genetics and Developmental Biology,Innovative Academy of Seed Design,Chinese Academy of Sciences,Beijing 100101,China [4]Institute of Crop Sciences,Chinese Academy of Agricultural Sciences(CAAS),Beijing 100081,China [5]University of Chinese Academy of Sciences,Beijing 100049,China [6]International Maize and Wheat Improvement Center(CIMMYT)China Office,c/o CAAS,Beijing 100081,China [7]CAS-JIC Centre of Excellence for Plant and Microbial Science(CEPAMS),Institute of Genetics and Developmental Biology,Chinese Academy of Sciences,Beijing 100101,China

出　　处：《The Crop Journal》2024年第1期295-300,共6页作物学报（英文版）

基　　金：This work was supported by the Strategic Priority Research Program of Chinese Academy of Sciences(XDA24010104-2).

摘　　要：Some haplotypes of the sucrose synthase gene TaSus1 are associated with thousand-grain weight(TGW)in wheat(Triticum aestivum L.).However,no mutations have been identified within the gene to test this association.The effects of TaSus1 on grain number per spike(GNS)also are largely unknown.Our previous genome-wide association study identified TaSus-A1 as a candidate gene controlling fertile spikelet number per spike(FSN).In the present study,we generated two independent mutants for the three TaSus1 homoeologs by CRISPR/Cas9-mediated genome editing.The triple mutants displayed lower FSN,GNS,grain number per spikelet(GNST),and TGW than wild-type plants.In 306 hexaploid wheat accessions,two single-nucleotide polymorphisms in TaSus-A1 contributed differently to GNS.Introgression of the two alleles into a wheat genetic background confirmed their effects.The alleles differed in geographical distribution among the accessions.

关 键 词：Domestication selection Fertile spikelet number per spike(FSN) Geographical differentiation Grain number per spike(GNS) TaSus1 

分 类 号：S512.1[农业科学—作物学]