[O31] Temperature Stress

[O31-02] Genome-Wide Associated Study Identifies GCN5-Activated Glyoxal Metabolism Related Gene Conferring Heat Tolerance in Wheat

(Invited Speaker)

^○Zhaorong Hu, Jingchen Lin, Huiru Peng, Mingming Xin, Weilong Guo, Yingyin Yao, Zhongfu Ni, Qixin Sun (College of Agronomy and Biotechnology, China Agricultural University, China)

Wheat (Triticum aestivum L.) is one of the major crops largely cultivated and consumed all over the world. High temperatures occur frequently, presenting major environmental challenges with respect to wheat growth and reproduction as global warming. The molecular mechanism of the heat stress response in wheat is largely unclear. Here we perform genome-wide association analysis of a wheat natural population and identify an elite haplotype of glyoxal metabolism related gene TaGLY1 that enhances heat tolerance of wheat. TaGLY1HapA differs in the protein with natural variations, which are differentially trans-activated by TaGCN5, a histone acetyltransferase. Our discovery highlights this GCN5-GLY1 signaling cascade as a strategy for heat tolerance breeding in wheat.