Quantitative trait loci analysis for root traits in synthetic hexaploid wheat under drought stress conditions

作     者：LIU Rui-xuan WU Fang-kun YI Xin LIN Yu WANG Zhi-qiang LIU Shi-hang DENG Mei MA Jian WEI Yu-ming ZHENG You-liang LIU Ya-xi LIU Rui-xuan;WU Fang-kun;YI Xin;LIN Yu;WANG Zhi-qiang;LIU Shi-hang;DENG Mei;MA Jian;WEI Yu-ming;ZHENG You-liang;LIU Ya-xi

作者机构：Triticeae Research InstituteSichuan Agricultural UniversityChengdu 611130P.R.China College of Environmental SciencesSichuan Agricultural UniversityChengdu 611130P.R.China 

出 版 物：《Journal of Integrative Agriculture》 (农业科学学报（英文版）)

年 卷 期：2020年第19卷第8期

页      面：1947-1960页

核心收录：

学科分类：0710[理学-生物学] 0832[工学-食品科学与工程（可授工学、农学学位）] 0830[工学-环境科学与工程（可授工学、理学、农学学位）] 1004[医学-公共卫生与预防医学(可授医学、理学学位)] 0905[农学-畜牧学] 0906[农学-兽医学] 09[农学] 0901[农学-作物学] 0703[理学-化学] 0902[农学-园艺学] 0713[理学-生态学] 

基　　金：supported by the National Natural Science Foundation of China(31771794,91731305 and 31560388) the outstanding Youth Foundation of the Department of Science and Technology of Sichuan Province,China(2016JQ0040) the Key Technology Research and Development Program of the Department of Science and Technology of Sichuan Province,China(2016NZ0057) the International Science&Technology Cooperation Program of the Bureau of Science and Technology of Chengdu,China(2015DFA306002015-GH03-00008-HZ) 

主　　题：synthetic hexaploid wheat quantitative trait loci drought stress root traits 

摘      要：Synthetic hexaploid wheat(SHW),possesses numerous genes for drought that can help breeding for drought-tolerant wheat *** evaluated 10 root traits at seedling stage in 111 F9 recombinant inbred lines derived from a F2 population of a SHW line(SHW-L1)and a common wheat line,under normal(NC)and polyethylene glycol-simulated drought stress conditions(DC).We mapped quantitative trait loci(QTLs)for root traits using an enriched high-density genetic map containing 120370 single nucleotide polymorphisms(SNPs),733 diversity arrays technology markers(DArT)and 119 simple sequence repeats(SSRs).With four replicates per treatment,we identified 19 QTLs for root traits under NC and DC,and 12 of them could be consistently detected with three or four *** novel QTLs for root fresh weight and root diameter under NC explained 9 and 15.7%of the phenotypic variation respectively,and six novel QTLs for root fresh weight,the ratio of root water loss,total root surface area,number of root tips,and number of root forks under DC explained 8.5–14%of the phenotypic *** seven of eight novel QTLs could be consistently detected with more than three *** provide essential information for fine-mapping QTLs related to drought tolerance that will facilitate breeding drought-tolerant wheat cultivars.