玉米自交系齐319对弯孢霉叶斑病抗性的遗传分析  

Genetic analysis of resistance to Curvularia leaf spot of maize (Zea mays L.) inbred line Qi319

作　　者：刘翠娜[1] 代君丽[1] 吴刘记[2] 邢小萍[1] 李洪连[1] 袁虹霞[1] 

机构地区：[1]河南农业大学植物保护学院,河南郑州450002 [2]河南农业大学农学院,河南郑州450002

出　　处：《河南农业大学学报》2015年第2期234-238,共5页Journal of Henan Agricultural University

基　　金：河南省现代农业产业技术体系项目(S2010-02-G05);"十二五"国家粮丰工程项目(2012BAD04B07)

摘　　要：以玉米自交系齐319(抗)×昌7-2(感)组合的P1、P2、F1、F24个世代为材料,采用植物数量性状主基因+多基因混合遗传模型,分析了该组合苗期及成株期抗病遗传特点,揭示了齐319对玉米弯孢霉叶斑病的抗性遗传规律。结果表明:齐319苗期抗性遗传符合2对加性-显性主基因+加性-显性多基因模型;成株期抗性遗传符合2对加性-显性主基因+加性-显性多基因模型。控制F2群体苗期与成株期抗性的主基因遗传率分别为65.14%和83.98%,表明齐319对弯孢霉叶斑病的抗性是两对主基因起主要作用。The experiment was conducted by the method of major gene plus polygenes mixed genetic model with materials of four generations（ P1,P2,F1,F2） from a cross of maize（ Zea mays L.） inbred line Qi319（ resistance） × Chang7-2（ susceptible）. The aim was to reveal the resistant heredity rule of inbred line Qi319 to Curvularia leaf spot by analyzing the resistance in seedling stage and adult stage for four generations（ P1,P2,F1,F2）. The experimental results indicated that the resistant heredity in seedling stage fit two pairs of additive-dominance major genes ＋ additive-dominance polygenes model;the resistant heredity in adult stage fit two pairs of additive major genes ＋ additive-dominance polygenes model. The major gene heribility of F2 generation in two growth periods was 65. 14% and83. 98% respectively,which indicated the two major genes of inbred line Qi319 played the dominant role in resistance to Curvularia leaf spot.

关 键 词：玉米 齐319 弯孢霉叶斑病 抗性 遗传分析 

分 类 号：S435[农业科学—农业昆虫与害虫防治]