玉米种子内部拟轮枝镰孢菌抗性的QTL定位  

QTL Mapping of Seed Internal Fusarium verticillioides Resistance in Maize

作　　者：马培培 周子键[1] 赫可伟 宋云霞 吴建宇[1] MA Peipei;ZHOU Zijian;HE Kewei;SONG Yunxia;WU Jianyu(Agronomy College,Henan Agricultural University,Zhengzhou 450002,China)

机构地区：[1]河南农业大学农学院,河南郑州450002

出　　处：《河南农业科学》2020年第3期101-106,共6页Journal of Henan Agricultural Sciences

基　　金：国家自然科学基金项目(31761143009)。

摘　　要：为探究玉米种子内部对拟轮枝镰孢菌的抗性,利用由抗病自交系BT-1与感病自交系N6构建的RIL群体为材料,进行4个环境的联合QTL分析.结果表明,6个控制种子内部对拟轮枝镰孢菌抗性的QTL分布在第1、3、4、9、10染色体上,表型贡献率介于1.32%~7.62%.其中,表型贡献率最高的QTL qSIR3-1位于第3染色体,解释7.62%的表型贡献率,抗病效应来自于抗病亲本BT-1.6个QTL中的1个与已知种子外部抗性QTL一致,表明玉米种子内部对拟轮枝镰孢菌的抗性是独立的性状.In order to explore the seed internal resistance of maize to Fusarium verticillioides,RIL populations constructed from disease resistant inbred line BT-1 and susceptible inbred line N6 were used and phenotypes were surveyed in four environments to identify resistance QTLs.The results showed that 6 QTLs were located on chromosomes 1,3,4,9 and 10,with phenotypic contribution rate from 1.32%to 7.62%.The resistance QTL qSIR3-1 derived from BT-1 with the greatest contribution rate was located on chromosome 3,which could explain 7.62%of phenotypic variance.One of six identified QTLs was consistent with seed external resistance,showing that the internal resistance of seeds to F.verticillioides differed from other tissue resistance with some conservative mechanism.

关 键 词：玉米 拟轮枝镰孢菌 种子内部抗性 QTL 表型贡献率 

分 类 号：S513[农业科学—作物学]