新疆玉米苗期耐旱性状全基因组关联分析  

Genome-wide Association Analysis of Drought Tolerance Traits at Maize Seedling Stage in Xinjiang

作　　者：常晓春[1,2] 李建平 郝晓燕[1,2] 胡文冉 陈果[1,2] 高升旗 足木热木·吐尔逊[1,2] 赵准 黄全生[1,2] CHANG Xiaochun;LI Jianping;HAO Xiaoyan;HU Wenran;CHEN Guo;GAO Shengqi;Zumuremu Tuerxun;ZHAO Zhun;HUANG Quansheng(Institute of Nuclear and Biological Technology of XAAS,Urumqi Xinjiang 830091;Key Lab of Xinjiang Crop Biotechnology,Urumqi Xinjiang 830091)

机构地区：[1]新疆农业科学院核技术生物技术研究所,新疆乌鲁木齐830091 [2]新疆农作物生物技术重点实验室,新疆乌鲁木齐830091

出　　处：《现代农业科技》2022年第21期24-27,共4页Modern Agricultural Science and Technology

基　　金：新疆农作物生物重点实验室平台能力提升项目“基于全基因组关联分析(GWAS)筛选抗旱玉米新种质”。

摘　　要：干旱是制约新疆玉米生产的首要因素。本研究以包含384个玉米杂交种(F_(1))的群体为试验材料,开展F_(1)群体田间耐旱性鉴定,然后从F_(1)群体中选择耐旱性优异的材料,用各自骨干亲本进行回交,采用FarmCPU(fixed and random model circulating probability unification)进行全基因组关联分析。结果表明:与常规灌溉相比,干旱胁迫条件下玉米开花—吐丝间隔期(ASI)变长、株高变低、穗长变短,差异达到极显著水平;利用全基因组关联分析,共鉴定到16个耐旱性状(REC)关联的位点。Drought is the primary factor restricting maize production in Xinjiang.In this study,384 maize hybrids(F_(1))were used as experimental materials to identify the drought tolerance of F_(1) population in the field.Then,materials with excellent drought tolerance were selected from F_(1) population and backcrossed with their respective backbone parents.The genome-wide association analysis was performed using FarmCPU(fixed and random model circulating probability unification).The results showed that under drought stress,the anthesis-silking interval(ASI)of maize was longer,the plant height was lower and the ear length was shorter than that under conventional irrigation,and the difference reached a very significant level.Using genome-wide association analysis,a total of 16 loci associated with drought tolerance traits(REC)were identified.

关 键 词：玉米 耐旱性 全基因组关联分析 干旱 耐旱性状 

分 类 号：S513[农业科学—作物学]