Euphytica

, Volume 123, Issue 1, pp 21–29 | Cite as

Molecular characterization of a novel powdery mildew resistance gene Pm30 in wheat originating from wild emmer

  • Zhiyong Liu
  • Qixin Sun
  • Zhongfu Ni
  • Eviatar Nevo
  • Tsomin Yang
Article

Abstract

Powdery mildew caused by Erysiphe graminis f. sp. tritici is one of the most important wheat diseases in many regions of theworld. A powdery mildew resistance gene, originating from wild emmerwheat (Triticum dicoccoides) accession `C20', from Rosh Pinna, Israel,was successfully transferred to hexaploid wheat through crossing andbackcrossing. Genetic analysis indicated that a single dominant genecontrols the powdery mildew resistance at the seedling stage. SegregatingBC1F2 progenies of the cross 87-1/C20//2*8866 wereused for bulked segregant analysis (BSA). The PCR approach was used togenerate polymorphic DNA fragments between the resistant and susceptibleDNA pools by use of 10-mer random primers, STS primers, and wheatmicrosatellite primers. Three markers, Xgwm159/430,Xgwm159/460, and Xgwm159/500, were found to be linked tothe resistance gene. After evaluating the polymorphic markers in twosegregating populations, the distance between the markers and the mildewresistance gene was estimated to be 5–6 cM. By means of ChineseSpring nullisomic-tetrasomics and ditelosomics, the polymorphic markersand the resistance gene were assigned to chromosome arm 5BS and werephysically mapped on the gene rich regions of fragment length (FL) 0.41–0.43 by Chinese Spring deletion lines. As no powdery mildew resistancegene has been reported on chromosome arm 5BS, the mildew resistancegene originating from C20 should be a new gene and is designated Pm30.

Erysiphe graminis f. sp. tritici Blumeria graminis Triticum dicoccoides microsatellite physical mapping powdery mildew resistance wild emmer 

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Copyright information

© Kluwer Academic Publishers 2002

Authors and Affiliations

  • Zhiyong Liu
    • 1
  • Qixin Sun
    • 1
  • Zhongfu Ni
    • 1
  • Eviatar Nevo
    • 2
  • Tsomin Yang
    • 1
  1. 1.Department of Plant Genetics & BreedingChina Agricultural UniversityBeijingChina
  2. 2.Institute of EvolutionHaifa UniversityHaifaIsrael

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