玉米自交系氮高效指标的筛选及综合评价  

Indexes Screening and Evaluation for Nitrogen Use Efficiency in Maize Inbred Lines

作　　者：常晓 郭志军[1] 王小博 吴嫚[1] 韩慧敏[1] 杨兆生[1] 李健[1] CHANG Xiao;GUO Zhi-jun;WANG Xiao-bo;WU Man;HAN Hui-min;YANY Zhao-sheng;LI Jian(The Institute of Cotton Research,Chinese Academy of Agricultural Science / State Key Laboratory of Cotton Biology,Anyang 455000,China)

机构地区：[1]中国农业科学院棉花研究所/棉花生物学国家重点实验,河南安阳455000

出　　处：《玉米科学》2019年第1期17-24,共8页Journal of Maize Sciences

基　　金：河南省科技攻关项目"玉米氮高效材料的筛选与利用"(172102110175);中央级公益性科研院所基本科研业务费专项"玉米氮高效品种选育与机理研究"(161012018006);"高产优质型玉米种质资源的创新与利用"(1610162016022)

摘　　要：以47个玉米自交系为材料,测定玉米自交系在低氮和正常氮处理下株高、穗位高、叶绿素SPAD值、吐丝期叶面积指数、吐丝期干重、全株干重、产量、子粒氮积累量、全株氮积累量和氮肥生产效率等10个指标,以耐低氮指数为参数,结合其变异系数,运用相关性分析、主成分分析和隶属函数法对其氮高效能力进行综合评价。结果表明,叶绿素、全株干重、产量、子粒氮积累量、全株氮积累量和氮肥生产效率等可作为玉米自交系氮高效能力的筛选指标。通过聚类分析,筛选得到PH6WC、郑58、PH6WC×郑58、PH6WC×D1798Z、D1798Z×521、HCL645×C7-2、HCL645×C7-2×单598、外杂二环系、美杂二环系×郑58、DH351×郑58、XL21×PH6WC共11个低氮高效型玉米自交系。This research was carried out with 47 maize inbred lines as test materials under no nitrogen(N0,0kg/ha)and normal nitrogen(N180,180 kg/ha)levels.The values of ten indexes for each inbred line,including plant height,ear height,SPAD value,leaf area index(LAI)at silking stage,plant dry weight at silking and maturity stages,nitrogen uptake in grain,total nitrogen uptake and nitrogen use efficiency in grain production(NGPE)at maturity stage,were evaluated by correlation analysis,principal component analysis and membership function method,com-bined with the variation of coefficient.The results showed that SPAD value,total dry weight,yield,nitrogen uptake in grain,total nitrogen uptake and NGPE were recommended as screening indexes for nitrogen use efficient.Thus us-ing clustering analysis,11 maize inbred lines were determined as materials with higher nitrogen use efficiency at low nitrogen level.

关 键 词：玉米 产量 氮高效 筛选指标 隶属函数 聚类分析 

分 类 号：S513.035.1[农业科学—作物学]