小麦品种周麦22抗叶锈病的QTL定位  

QTLs Mapping of Leaf Rust Resistance in Wheat Variety Zhoumai 22

作　　者：闫晓翠 段振盈 杨华丽[2] 姚占军[2] 李在峰[1] Yan Xiaocui;Duan Zhenying;Yang Huali;Yao Zhanjun;Li Zaifeng(College of Plant Protection,Hebei Agricultural University/Biological Control Center for Plant Diseases and Plant Pests of Hebei,Baoding 071001,Hebei,China;College of Agronomy,Hebei Agricultural University/Key Laboratory of Research and Utilization of Crop Germplasm Resources in North China,Ministry of Education,Baoding 071001,Hebei,China)

机构地区：[1]河北农业大学植物保护学院/河北省农作物病虫害生物防治工程技术研究中心,河北保定071001 [2]河北农业大学农学院/华北作物种质资源研究与利用教育部重点实验室,河北保定071001

出　　处：《作物杂志》2022年第2期69-74,共6页Crops

基　　金：国家重点研发计划(2017YFD300901);河北省在读研究生创新项目(CXZZBS2020093)。

摘　　要：小麦叶锈病(leaf rust)是对小麦危害最严重的真菌病害之一,原菌群体中新致病菌类型的不断出现导致部分抗叶锈病基因的抗性功能逐步丧失,不断发掘和研究利用新抗源基因、培育种植抗病品种是控制该病害最有效的方法。周麦22在田间成株期对叶锈病表现出良好的抗性,为解析周麦22成株期抗叶锈病的遗传基础,将周麦22与铭贤169杂交构建遗传群体,获得255个F;家系群体,经2个年度的大田成株期抗叶锈病鉴定,并利用复合区间作图法对该群体的抗叶锈病QTL进行定位分析。结果显示,该群体成株期检测到2个抗叶锈病QTL位点,分别位于1BL和2BS染色体上,命名为QLr.hebau-1BL和QLr.hebau-2BS,分别解释9.62%~11.88%和16.89%~20.99%的表型变异,该位点对叶锈病抗性表现稳定,均来自抗病品种周麦22。初步的遗传定位结果显示,QLr.hebau-2BS可能为已知抗叶锈病基因LrZH22,而QLr.hebau-1BL是新的抗病QTL。Leaf rust(LR) is one of the serious fungal diseases of wheat. Planting resistant cultivars is the most effective and safe way to control the disease. Due to the emergence of new pathotypes in the pathogen population,the resistance of the existing leaf rust resistance gene is gradually lost. Therefore, it is necessary to continuously explore and study new resistance sources to control this important disease. In the present study, the wheat variety Zhoumai 22 showed resistance to leaf rust at the adult plant stage. In order to analyze the genetic basis of resistance to leaf rust at the adult plant stage of Zhoumai 22, 255 F;lines were obtained by crossing Zhoumai 22 with Mingxian 169. The resistance to leaf rust was identified at adult plant stage in field in two crop seasons, and the QTL for leaf rust resistance in the population was analyzed by composite interval mapping. The results showed that two QTLs for leaf rust resistance were detected at adult plant stage in the population, which were located on 1BL and 2BS chromosomes respectively. The two QTLs were designated as QLr.hebau-1BL and QLr.hebau-2BS,and they explained the phenotypic variation of 9.62%-11.88% and 16.89%-20.99%, respectively. The two QTLs showed stable resistance to leaf rust, and they were provided by Zhoumai 22. Results based on preliminary genetic mapping indicated that QLr.hebau-2BS is LrZH22, whereas QLr.hebau-1BL is a new leaf rust resistance QTL.

关 键 词：小麦 叶锈病 成株抗性 QTL定位 

分 类 号：S435.121.43[农业科学—农业昆虫与害虫防治]