玉米苗期淹水性状全基因组关联分析  

Genome-wide association study of waterlogging traits in maize at seedling stage

作　　者：狄邺 孙萍东 关媛[2] 顾炜 郑洪建[2] 邹华文[1] 张学才 施标[4] 于典司[2] 张丙林 DI Ye;SUN Pingdong;GUAN Yuan;GU Wei;ZHENG Hongjian;ZOU Huawen;ZHANG Xuecai;SHI Biao;YU Diansi;ZHANG Binglin(College of Agriculture,Yangtze University,Jinzhou 434023,China;Crop Breeding&Cultivation Research Institute,Shanghai Academy of Agricultural Sciences,CIMMYT-China Specialty Maize Research Center,Shanghai Engineering Research Center of Specialty Maize,Shanghai Key Laboratory of Agricultural Genetics and Breeding,Shanghai 201403,China;International Maize and Wheat Improvement Center(CIMMYT),Global Maize Program,Texcoco 56237,Mexico;Institute of Biotechnology,Shanghai Academy of Agricultural Sciences,Shanghai 201106,China)

机构地区：[1]长江大学农学院,荆州434023 [2]上海市农业科学院作物育种栽培研究所,CIMMYT-中国特用玉米研究中心,上海特用玉米工程技术研究中心,上海市农业遗传育种重点实验室,上海201403 [3]国际玉米小麦改良中心,全球玉米项目组,特斯科科56237 [4]上海市农业科学院生物技术研究所,上海201106

出　　处：《上海农业学报》2023年第5期61-66,共6页Acta Agriculturae Shanghai

基　　金：上海市科技兴农项目[沪农科创字(2019)第1-1号];上海市青年科技启明星项目(23QB1403100)。

摘　　要：以329份来源广泛的玉米自交系为材料,在苗期进行淹水处理,测定耐淹水相关指标,利用Farm CPU模型通过全基因组关联分析方法挖掘玉米苗期耐淹水性状的关联位点。结果表明:玉米苗期淹水处理组与对照有较大差异,各个性状的变异系数普遍偏高,且具有不同的相关性。共检测到49个显著关联位点,其中与SPAD值和株高相关的显著位点较多。依据这些显著位点共预测到18个基因,其中与SPAD值有关的基因有7个。本研究可为解析玉米苗期耐淹水分子机制和培育耐淹水玉米新品种提供理论依据与耐淹水新种质。Taking 329 maize inbred lines from a wide range of sources as materials,waterlogging treatment was carried out at seedling stage to determine the relevant indicators of waterlogging tolerance.The FarmCPU model was used to explore the association sites of waterlogging tolerance traits in maize at seedling stage through genome-wide association study.The results showed that there were significant differences between the waterlogging treatment group and the control group in maize at seedling stage,and the coefficient of variation of various traits was generally high,with different correlations.A total of 49 significant association sites were detected,with more significant sites associated with SPAD value and plant height.Based on these significant loci,a total of 18 genes were predicted,including 7 genes related to SPAD value.This study could provide theoretical basis and new germplasm for analyzing the molecular mechanism of waterlogging tolerance in maize seedlings and cultivating new varieties of waterlogging tolerant maize.

关 键 词：玉米 苗期 淹水胁迫 全基因组关联分析 

分 类 号：S513[农业科学—作物学]