Transfer and mapping of a gene conferring later-growth-stage powdery mildew resistance in a tetraploid wheat accession

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• 作者：Na Li (1) (2)
  Ziruo Wen (1) (2)
  Jing Wang (1) (2)
  Bisheng Fu (1) (2)
  Jiajia Liu (1) (2)
  Huanhuan Xu (1) (2)
  Zhongxin Kong (1) (2)
  Lixia Zhang (1) (2)
  Haiyan Jia (1) (2)
  Zhengqiang Ma (1) (2) (3)
  
• 关键词：Wheat ; Powdery mildew ; Molecular mapping ; HSM1 ; Pm1
• 刊名：Molecular Breeding
• 出版年：2014
• 出版时间：March 2014
• 年：2014
• 卷：33
• 期：3
• 页码：669-677
• 全文大小：465 KB
• 作者单位：Na Li (1) (2)
  Ziruo Wen (1) (2)
  Jing Wang (1) (2)
  Bisheng Fu (1) (2)
  Jiajia Liu (1) (2)
  Huanhuan Xu (1) (2)
  Zhongxin Kong (1) (2)
  Lixia Zhang (1) (2)
  Haiyan Jia (1) (2)
  Zhengqiang Ma (1) (2) (3)
  
  1. The Applied Plant Genomics Laboratory of Crop Genomics and Bioinformatics Centre, Nanjing Agricultural University, Nanjing, 210095, Jiangsu, China
  2. National Key Laboratory of Crop Genetics and Germplasm Enhancement, Nanjing Agricultural University, Nanjing, 210095, Jiangsu, China
  3. College of Agricultural Sciences, Nanjing Agricultural University, Nanjing, 210095, Jiangsu, China
  
• ISSN：1572-9788

文摘

Wheat powdery mildew is a severe foliar disease and causes significant yield losses in epidemic years. Breeding and using resistant cultivars is the most widely employed strategy to curb this disease. To identify and transfer powdery mildew resistance genes in wild emmer wheat accession TA1410 into common wheat, a resistant F3 line derived from the cross of TA1410?×?durum wheat line Zhongyin1320 was crossed with common wheat cultivar Yangmai158. The homozygous resistant BC5F2 lines derived from the backcross with Yangmai158 exhibited susceptibility at seedling stage and conferred increasing resistance when the plants were closer to heading stage. In two segregating BC5F3 families investigated at heading stage, the segregation of the resistance fit a 3:1 ratio, suggesting that a single dominant gene controls the resistance. This resistance gene, designated HSM1, was mapped to the 0.6-cM Xmag5825.1–Xgwm344 interval on chromosome 7AL and co-segregated with Xrga-C3 and Xrga-C6. A mapping position comparison with other powdery mildew resistance genes on this chromosome suggested that HSM1 belongs to the Pm1 resistance gene cluster. HSM1 is a useful candidate gene for resistance breeding, particularly in winter-wheat growing areas.