Abstract
Powdery mildew is a major fungal disease in wheat growing areas worldwide. A novel source of resistance to wheat powdery mildew present in the germplasm line NC97BGTD7 was genetically characterized as a monogenic trait in greenhouse and field trials using F2 derived lines from a NC97BGTD7 X Saluda cross. Microsatellite markers were used to map and tag this resistance gene, now designated Pm34. Three co-dominant microsatellite markers linked to Pm34 were identified and their most likely order was established as: Xbarc177-5D, 5.4cM, Pm34, 2.6cM, Xbarc144-5D, 14cM, Xgwm272-5D. These microsatellite markers were previously mapped to the long arm of the 5D chromosome and their positions were confirmed using Chinese Spring nullitetrasomic Nulli5D-tetra5A and ditelosomic Dt5DL lines. Pm2, the only other known Pm gene on chromosome 5D, has been mapped to the short arm and its specificity is different from that of Pm34.
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Acknowledgments
The authors thank Rene Navarro and David Wooten for their help with field work, Jeannette Lyerly for her technical assistance and Lynda Whitcher for providing the powdery mildew isolate. We gratefully acknowledge Prof. Bob McIntosh for some excellent additions to the final draft of this manuscript.
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Communicated by D. A. Lightfoot.
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Miranda, L.M., Murphy, J.P., Marshall, D. et al. Pm34: a new powdery mildew resistance gene transferred from Aegilops tauschii Coss. to common wheat (Triticum aestivum L.). Theor Appl Genet 113, 1497–1504 (2006). https://doi.org/10.1007/s00122-006-0397-9
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DOI: https://doi.org/10.1007/s00122-006-0397-9