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作物学报 ›› 2009, Vol. 35 ›› Issue (6): 998-1005.doi: 10.3724/SP.J.1006.2009.00998

• 作物遗传育种·种质资源·分子遗传学 • 上一篇    下一篇

野生二粒小麦导入普通小麦的抗白粉病基因MlWE29分子标记定位

张连松，华为，关海英，李根桥，张宏涛，解超杰，杨作民，孙其信，刘志勇*   

  1. 中国农业大学植物遗传育种系/农业生物技术国家重点实验室/农业部作物基因组学与遗传改良重点开放实验室/北京市作物遗传改良重点实验室/教育部作物杂种优势研究与利用重点实验室，北京100193
  • 收稿日期:2008-12-22 修回日期:2009-01-05 出版日期:2009-06-12 网络出版日期:2009-04-16
  • 通讯作者: 刘志勇，E-mail:zhiyongliu@cau.edu.cn
  • 基金资助:

    本研究由国家高技术研究发展计划（863计划）项目（2006AA100102，2006AA10Z1E9，2006AA10Z1C4，2006BAD01A02），国家自然科学基金项目（30425039和30771341），教育部长江学者和创新团队发展计划项目，高等学校学科创新引智计划项目（111-2-03）资助。

Molecular Mapping of Powdery Mildew Resistance Gene MlWE29 in Wheat Originated from Wild Emmer(Triticum turgidum var.dicoccoides)

ZHANG Lian-Song,HUA Wei,GUAN Hai-Ying,LI Gen-Qiao,ZHANG Hong-Tao,XIE Chao-Jie,YANG Zuo-Min,SUN Qi-Xin,LIU Zhi-Yong*   

  1. Department of Plant Genetics & Breeding,China Agricultural University/State Key Laboratory for Agrobiotechnology/Key Laboratory of Crop Genomics and Genetic Improvement,Ministry of Agriculture/Beijing Key Laboratory of Crop Genetic Improvement/Key Laboratory of Crop Heterosis Resarch & Utilization,Ministry of Education,Beijing 100094,China
  • Received:2008-12-22 Revised:2009-01-05 Published:2009-06-12 Published online:2009-04-16
  • Contact: LIU Zhi-Yong，E-mail:zhiyongliu@cau.edu.cn

PDF

1693

被引次数

7

摘要：

小麦白粉病是严重影响小麦生产的重要病害之一，培育和应用抗病品种是有效控制和减少病害的最经济有效的方法。野生二粒小麦是硬粒小麦和普通小麦的四倍体野生祖先种，是小麦抗病性遗传改良的重要基因资源。本研究利用来自以色列的野生二粒小麦WE29与普通小麦杂交，再用普通小麦连续回交和自交，育成高抗白粉病(Blumeria graminis f. sp. tritici)小麦新品系3D258(系谱为燕大1817/WE29//5*87-1, BC4F6)。将3D258和高感小麦白粉病的普通小麦品种薛早配制杂交组合，对其F1、F2代分离群体和F3代家系进行白粉病抗性鉴定和遗传分析。结果表明3D258携带抗白粉病显性单基因，暂命名为MlWE29。利用集群分离分析法(BSA)和分子标记分析，发现6个SSR标记(Xgwm335、Xgwm213、Xgwm639、Xwmc415、Xwmc289和Xwmc75)和5个EST-STS标记(BE494426、BE442763、CD452476、BE445282和BE407068)与抗白粉病基因MlWE29连锁。利用中国春缺体-四体系、双端体系和缺失系将抗白粉病基因MlWE29标记物理定位于5BL染色体的0.59–0.79区域。这一普通小麦抗白粉病种质资源的创制及其连锁分子标记的建立为小麦抗病基因分子标记辅助选择、基因积聚和分子育种提供了新的物质基础。

关键词: 白粉病, 野生二粒小麦, 抗白粉病基因, 分子标记

Abstract:

Powdery mildew, caused by Blumeria graminis f. sp. tritici, is one of the most important wheat diseases in many regions in the world. Breeding for the resistance is the most economical and effective method for controlling this disease. Wild emmer (Triticum turgidum var. dicoccoides) is the immediate progenitor of cultivated tetraploid and hexaploid wheats and has been proven to be an important resource of disease resistance improvement. In this study, a common wheat line 3D258 with powdery mildew resistance was developed by crossing wild emmer accession WE29 with common wheat landrace Yanda1817 and backcrossing with common wheat line 87-1 (Yanda 1817/WE29//5*87-1, F6). Genetic analysis of the F2 population and their F3 families, developed from 3D258 and a susceptible common wheat cultivar Xuezao, indicated that the powdery mildew resistance in 3D258 was controlled by a single dominant gene, designated temporarily as MlWE29. Molecular markers and the bulked segregant analysis were used to characterize the powdery mildew resistance gene MlWE29. Six SSR markers (Xgwm335, Xgwm213, Xgwm639, Xwmc415, Xwmc289, and Xwmc75) and five EST-STS markers (BE494426, BE442763, CD452476, BE445282, and BE407068) were found to be linked to MlWE29. Using Chinese Spring nullisomic-tetrasomics, ditelosomics and deletion lines, MlWE29 was physically mapped on chromosome 5BL bin 0.59–0.79. The common wheat line 3D258 and its resistance gene linked molecular markers could be used in disease resistance genes pyramiding and marker-assisted selection in wheat breeding program.

Key words: Blumeriagraminis f.sp.tritici, Triticum turgidum var.dicoccoides, Powdery mildew resistance gene, Molecular markers


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