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

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

作者机构：Frontiers Science Center for Molecular Design BreedingKey Laboratory of Crop Heterosis and Utilization(MOE)Key Laboratory of Crop Genetic ImprovementChina Agricultural UniversityBeijing 100193China 

出 版 物：《Plant Communications》 (植物通讯（英文）)

年 卷 期：2023年第4卷第4期

页      面：255-270页

核心收录：

学科分类：09[农学] 0901[农学-作物学] 

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) 

主　　题：TaTCP4/10 B1 awn length haplotype wheat 

摘      要：Awns are important morphological markers for wheat and exert a strong physiological effect on wheat *** awn elongation suppressor B1 has recently been cloned through association and linkage analysis in ***,the mechanism of awn inhibition centered around B1 remains to be ***,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 *** analysis indicated that B1 inhibited awn elongation by impeding cytokinin-and auxinpromoted cell ***,B1 directly repressed the expression of TaRAE2 and TaLks2,whose orthologs have been reported to promote awn development in rice or *** 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/*** together,our results reveal novel mechanisms of awn development and provide genetic resources for trait improvement in wheat.