Pm34: a new powdery mildew resistance gene transferred from Aegilops tauschii Coss. to common wheat (Triticum aestivum L.)

• Published in: Theoretical and applied genetics Vol. 113; no. 8; pp. 1497 - 1504
• Main Authors: Miranda, L. M, Murphy, J. P, Marshall, D, Leath, S
• Format: Journal Article
• Language: English
• Published: Heidelberg Berlin/Heidelberg : Springer-Verlag 01.11.2006; Berlin Springer; Springer Nature B.V
• Subjects: Aegilops tauschii; Ascomycota; Biological and medical sciences; chromosome mapping; Chromosomes, Plant - genetics; Classical genetics, quantitative genetics, hybrids; Crop diseases; disease resistance; Fundamental and applied biological sciences. Psychology; Gene Transfer, Horizontal; genes; Genes, Plant - physiology; genetic markers; Genetics; Genetics of eukaryotes. Biological and molecular evolution; intergeneric hybridization; introgression; Microsatellite Repeats; Physical Chromosome Mapping; Plant Diseases - genetics; Plant Diseases - microbiology; Plants, Genetically Modified - genetics; Plants, Genetically Modified - microbiology; Pm34 gene; Poaceae - genetics; Pteridophyta, spermatophyta; Triticum - genetics; Triticum - microbiology; Triticum aestivum; Vegetals; wheat; Monocotyledones; Gene; Gramineae; Angiospermae; Aegilops tauschii; Genetics; Spermatophyta; Agriculture; Fungus resistance; Triticum aestivum
• ISSN: 0040-5752; 1432-2242
• DOI: 10.1007/s00122-006-0397-9

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.