春小麦品种青春221抗叶锈性遗传分析  

Genetic analysis of leaf rust resistance in spring wheat Qingchun 221

作　　者：袁军海[1,2] 陈万权[2] 

机构地区：[1]河北北方学院农学系,宣化075131 [2]中国农业科学院植物保护研究所植物病虫害生物学国家重点实验室,北京100193

出　　处：《植物保护学报》2013年第1期20-26,共7页Journal of Plant Protection

基　　金：国家"973"计划(2011CB100403);公益性行业(农业)科研专项(200903035);国家小麦产业技术体系岗位专家专项(CARS-03-01-18)

摘　　要：为明确青春221中抗叶锈病基因的有效性及其遗传机制,以青春221为父本,分别与感病品种铭贤169和Thatcher以及小麦抗叶锈病近等基因系Lr1、Lr3和Lr23的载体品系杂交,获得F1、F2和F3代群体后,分别在苗期和成株期进行抗病性测定。苗期,青春221对致病类型FGJ/QP、SHJ/GN和PHT/RP的抗病性分别由显性抗叶锈病基因Lr1、Lr3和Lr23控制,对致病类型BGD/HL的抗病性则由上述3对显性抗病基因独立或重叠作用控制,与Thatcher杂交后,青春221中的Lr23趋于隐性遗传并被Thatcher中的1对显性抑制基因抑制;成株期,青春221对优势致病类型PHT/RP和THT/TP混合菌种的抗病性由显性抗叶锈病基因Lr23控制,而Lr1和Lr3均不起作用。In order to determine the effectiveness and genetics of leaf rust resistance genes in Qingchun 221, the spring wheat cuhivar, as the pollen parent, was crossed with susceptible cuhivars Mingxian 169 （winter habit） and Thatcher （spring habit）, and Thatcher backcross near-isogenic lines for leaf rust re- sistance genes of Lrl, Lr3 and Lr23 respectively. The leaf rust resistance of F1 , F2 and F3 plants was test- ed at both the seedling and adult-plant stages to several pathotypes of Puccinia triticina. In the seedlings, the resistance of Qingchun 221 to pathotype FGJ/QP, SHJ/GN and PHT/RP was controlled by dominant leaf rust resistance genes Lrl, Lr3, and Lr23, respectively, and all three genes were effective against the pathotype BGD/HL dependently or ovedappedly. In the cross of Thatcher/Qingchun 221, Lr23 in Qing- chun 221 was deduced to be recessive and was inhibited by a dominant suppressor gene in Thatcher. At the adult-plant stage, Lr23 was responsible for the resistance to the mixture of predominant pathotypes PHT/RP and THT/TP, while Lrl and Lr3 didn＇t.

关 键 词：小麦 青春221 叶锈病 遗传分析 

分 类 号：S512.1[农业科学—作物学]