Abstract
Powdery mildew, caused by Blumeria graminis f. sp. tritici, is a very destructive wheat (Triticum aestivum) disease. Resistance was transferred from Elytrigia intermedium to common wheat by crossing and backcrossing, and line GRY19, that was subsequently selected, possessed a single dominant gene for seedling resistance. Five polymorphic microsatellite markers, Xgwm297, Xwmc335, Xwmc364, Xwmc426 and Xwmc476, on chromosome arm 7BS, were mapped relative to the powdery mildew resistance locus in an F2 population of Mianyang 11/GRY19. The loci order Xwmc426–Xwmc335–Pm40–Xgwm297–Xwmc364–Xwmc476, with 5.9, 0.2, 0.7, 1.2 and 2.9 cM genetic distances, was consistent with published maps. The resistance gene transferred from Elytrigia intermedium into wheat line GRY19 was novel, and was designated Pm40. The close flanking markers will enable marker assisted transfer of this gene into wheat breeding populations.
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Acknowledgments
Financial support was provided by the National Natural Science Foundation of China (30730065), the Fok Ying Tung Educations Foundation (No. 111030), China Postdoctoral Science Foundation (No. 0070411148) and the Specific Foundation of Agronomy (No. nyhyzx07-048). We are grateful to Dr R.A. McIntosh, University of Sydney, Australia, for a critical review of a draft of this paper.
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Communicated by E. Guiderdoni.
P.G. Luo and H.Y. Luo contributed equally to the work.
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Luo, P.G., Luo, H.Y., Chang, Z.J. et al. Characterization and chromosomal location of Pm40 in common wheat: a new gene for resistance to powdery mildew derived from Elytrigia intermedium . Theor Appl Genet 118, 1059–1064 (2009). https://doi.org/10.1007/s00122-009-0962-0
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DOI: https://doi.org/10.1007/s00122-009-0962-0