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Acta Agron Sin ›› 2008, Vol. 34 ›› Issue (04): 545-550.doi: 10.3724/SP.J.1006.2008.00545

• CROP GENETICS & BREEDING · GERMPLASM RESOURCES · MOLECULAR GENETICS • Previous Articles     Next Articles

Identification and Molecular Mapping of the Powdery Mildew Resistance Gene in Wheat Cultivar Yumai 66

HU Tie-Zhu12,LI Hong-Jie3,LIU Zi-Ji1,XIE Chao-Jie1,ZHOU Yi-Lin4,DUAN Xia-Yu4,JIA Xu5,YOU Ming-Shan1,YANG Zuo-Min1,SUN Qi-Xin1,LIU Zhi-Yong1*   

  1. 1 State Key Laboratory for Agrobiotechnology, Department of Plant Genetics & Breeding / Key Laboratory of Crop Genomics and Genetic Improvement, Ministry of Agriculture / Beijing Key Laboratory of Crop Genetic Improvement / Key Laboratory of Crop Heterosis Research & Utilization, Ministry of Education, China Agricultural University, Beijing 100094; 2 Wheat Center, Henan Institute of Science and Technology, Xinxiang 453003, Henan; 3 National Key Facility for Crop Gene Resources and Genetic Improvement / Institute of Crop Sciences, Chinese Academy of Agricultural Sciences, Beijing 100081; 4 Key Laboratory for Biology of Plant Disease and Insect Pests, Institute of Plant Protection, Chinese Academy of Agricultural Sciences, Beijing 100094; 5 State Key Laboratory of Plant Cell and Chromosome Engineering, Institute of Genetics and Developmental Biology, Chinese Academy of Sciences, Beijing 100101, China
  • Received:2007-11-07 Revised:1900-01-01 Online:2008-04-12 Published:2008-04-12
  • Contact: LIU Zhi-Yong

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Abstract: Powdery mildew, caused by Blumeria graminis f. sp. tritici, is one of the most important diseases of wheat (Triticum aestivum L.) worldwide. Breeding for resistance is the most economical and effective method for controlling the disease. Yumai 66, a common wheat cultivar derived from a wheat-triticale cross, is resistant to a wide spectrum of wheat powdery mildew isolates from both China and Canada. In the present study, genetic analysis indicated that Yumai 66 carried a single dominant gene for resistance to powdery mildew, designated tentatively PmYm66. The segregating F2 populations and their F3 progenies of the crosses Yumai 66/Mingxian 169 and Yumai 66/ND3509 were used for bulked segregation analysis (BSA). Four molecular markers were associated with PmYm66 in an order of EST48–EST83 (EST84)–Xksum193–PmYm66. These SSR and EST markers were assigned to the distal bin of chromosome 2AL by means of Chinese Spring nullisomic-tetrasomic, ditelisomic, and deletion lines. The reaction types of Yumai 66 to 21 B. graminis f. sp. tritici isolates from China was different from that of Pm4a and Pm4b located on chromosome 2AL.

Key words: Wheat, Yumai66, Powdery mildew, Resistance gene, Molecular marker

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