Genetic mapping of three alleles at the Pm3 locus conferring powdery mildew resistance in common wheat (Triticum aestivum L.)

Xiu Qiang Huang, Sai L.K. Hsam, Volker Mohler, Marion S. Röder, Friedrich J. Zeller

Research output: Contribution to journalArticlepeer-review

26 Scopus citations

Abstract

A set of differential isolates of Blumeria graminis f.sp. tritici was used to identify 10 alleles at the Pm3 locus on the short arm of chromosome 1A. Three F3 populations were used to map Pm3h in Abessi, Pm3i in line N324, and Pm3j alleles in GUS 122 relative to microsatellite markers. In total, 13 marker loci were mapped on chromosome 1AS and 1 marker on 1AL. The order of marker loci in the 3 mapping populations is consistent with previously published maps. All 3 alleles were mapped in the distal region of chromosome 1AS. The present study indicated that microsatellite markers are an ideal marker system for comparative mapping of alleles at the same gene locus in different mapping populations. The linkage distances of the closest microsatellite marker, Xgwm905-1A, to Pm3h, Pm3i, and Pm3j were 3.7 cM, 7.2 cM, and 1.2 cM, respectively. The microsatellite marker Xgwm905-1A cannot be used to distinguish between Pm3 alleles. The development of specific markers for individual Pm3 alleles is discussed on the basis of the recently cloned Pm3b allele.

Original languageEnglish
Pages (from-to)1130-1136
Number of pages7
JournalGenome
Volume47
Issue number6
DOIs
StatePublished - Dec 2004

Keywords

  • Genetic mapping
  • Marker-assisted selection
  • Microsatellite markers
  • Pm3 locus
  • Powdery mildew resistance
  • Triticum aestivum

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