The TaTCP4/10-B1 cascade regulates awn elongation in wheat(Triticum aestivum L.)

查看全文 作　　者：Wensheng [1]Ke;Jiewen [1]Xing;Zhaoyan [1]Chen;Yidi [1]Zhao;Weiya [1]Xu;Lulu [1]Tian;Jinquan [1]Guo;Xiaoming [1]Xie;Dejie [1]Du;Zihao [1]Wang;Yufeng [1]Li;Jin [1]Xu;Mingming [1]Xin;Weilong [1]Guo;Zhaorong [1]Hu;Zhenqi [1]Su;Jie [1]Liu;Huiru [1]Peng;Yingyin [1]Yao;Qixin [1]Sun;Zhongfu [1]Ni

机构地区：[1]Frontiers Science Center for Molecular Design Breeding,Key Laboratory of Crop Heterosis and Utilization(MOE),Key Laboratory of Crop Genetic Improvement,China Agricultural University,Beijing 100193,China

出　　处：《Plant Communications》索引2023年第4卷第4期,共16页

基　　金：supported by the National Key Research and Development Program of China(2022YFF1003401);the National Natural Science Foundation of China(31991210);the National Natural Science Foundation of China(32172069). 摘　　要：Awns are important morphological markers for wheat and exert a strong physiological effect on wheat yield.The awn elongation suppressor B1 has recently been cloned through association and linkage analysis in wheat.However,the mechanism of awn inhibition centered around B1 remains to be clarified.Here,we identified an allelic variant in the coding region of B1 through analysis of re-sequencing data;this variant causes an amino acid substitution and premature termination,resulting in a long-awn phenotype.Transcriptome analysis indicated that B1 inhibited awn elongation by impeding cytokinin-and auxinpromoted cell division.Moreover,B1 directly repressed the expression of TaRAE2 and TaLks2,whose orthologs have been reported to promote awn development in rice or barley.More importantly,we found that TaTCP4 and TaTCP10 synergistically inhibited the expression of B1,and a G-to-A mutation in the B1 promoter attenuated its inhibition by TaTCP4/10.Taken together,our results reveal novel mechanisms of awn development and provide genetic resources for trait improvement in wheat. 关键词：TaTCP4/10 B1 awn length HAPLOTYPE WHEAT

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The TaTCP4/10-B1 cascade regulates awn elongation in wheat(Triticum aestivum L.)

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