QTL mapping by GWAS and functional analysis of OsbZIP72 for cold tolerance at rice seedling stage  

作　　者：Yunsong Gu Haifeng Guo Huahui Li Runbin Su Najeeb Ullah Khan Jin Li Shichen Han Weitong Zhao Wei Ye Shilei Gao Andong Zou Meng Zhang Xingming Sun Zhanying Zhang Hongliang Zhang Pingrong Yuan Jinjie Li Zichao Li 

机构地区：[1]Beijing Key Laboratory of Crop Genetic Improvement,College of Agronomy and Biotechnology,China Agricultural University,Beijing 100193,China [2]Institute of Food Crop Research,Yunnan Academy of Agricultural Sciences,Kunming 650205,Yunnan,China [3]Sanya Institute of China Agricultural University,Sanya 572025,Hainan,China [4]Sanya Institute,Hainan Academy of Agricultural Sciences,Sanya 572025,Hainan,China

出　　处：《The Crop Journal》2024年第6期1697-1708,共12页作物学报（英文版）

基　　金：supported by the grants from Biological Breeding-National Science and Technology Major Project (2023ZD0407104);National Natural Science Foundation of China (32372080);Yunnan Fundamental Research Project (202201AS070071).

摘　　要：Rice is a major crop susceptible to chilling stress.The identification of quantitative trait loci and genes for cold tolerance is crucial for the rice breeding.Of 30 quantitative-trait loci affecting seedling cold tolerance identified in a genome-wide association study of 540 rice accessions,OsbZIP72 was assigned as the causative gene for one,qCTS9.1.A single-nucleotide polymorphism in its promoter accounted for variation in expression between indica and japonica subspecies.The favorable haplotype of OsbZIP72 originated in wild rice and contributed to the expansion of japonica rice to colder habitats.OsbZIP72 positively regulates genes coding reactive oxygen species(ROS)-scavenging proteins and maintains intracellular ROS homeostasis.These findings not only enhanced our understanding of environmental adaptation but also provide novel genetic resources and potential targets for molecular design breeding for cold tolerance in rice.

关 键 词：RICE GWAS Cold tolerance OsbZIP72 ROS 

分 类 号：S511[农业科学—作物学]