Theoretical and Applied Genetics

, Volume 127, Issue 5, pp 1199–1212 | Cite as

Association mapping of resistance to Puccinia hordei in Australian barley breeding germplasm

  • L. A. Ziems
  • L. T. Hickey
  • C. H. Hunt
  • E. S. Mace
  • G. J. Platz
  • J. D. Franckowiak
  • D. R. Jordan
Original Paper


Key message

To find stable resistance using association mapping tools, QTL with major and minor effects on leaf rust reactions were identified in barley breeding lines by assessing seedlings and adult plants.”


Three hundred and sixty (360) elite barley (Hordeum vulgare L.) breeding lines from the Northern Region Barley Breeding Program in Australia were genotyped with 3,244 polymorphic diversity arrays technology markers and the results used to map quantitative trait loci (QTL) conferring a reaction to leaf rust (Puccinia hordei Otth). The F3:5 (Stage 2) lines were derived or sourced from different geographic origins or hubs of international barley breeding ventures representing two breeding cycles (2009 and 2011 trials) and were evaluated across eight environments for infection type at both seedling and adult plant stages. Association mapping was performed using mean scores for disease reaction, accounting for family effects using the eigenvalues from a matrix of genotype correlations. In this study, 15 QTL were detected; 5 QTL co-located with catalogued leaf rust resistance genes (Rph1, Rph3/19, Rph8/14/15, Rph20, Rph21), 6 QTL aligned with previously reported genomic regions and 4 QTL (3 on chromosome 1H and 1 on 7H) were novel. The adult plant resistance gene Rph20 was identified across the majority of environments and pathotypes. The QTL detected in this study offer opportunities for breeding for more durable resistance to leaf rust through pyramiding multiple genomic regions via marker-assisted selection.


Quantitative Trait Locus Leaf Rust Association Mapping Quantitative Trait Locus Region DArT Marker 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.



This research was supported by the Grains Research and Development Corporation of Australia (UQ00056). The authors thank Ms Julie McKavanagh (DAFFQ), Mr Ryan Fowler (DAFFQ and QAAFI) and Ms Janet Barsby (DAFFQ) for technical assistance in the laboratory and field. We also wish to acknowledge the staff at the University of Sydney for providing seedling and adult plant data on leaf rust responses for the breeding populations assessed at Cobbitty.

Conflict of interest

The authors declare that they have no conflict of interest.

Supplementary material

122_2014_2291_MOESM1_ESM.xls (386 kb)
Supplementary material 1 The integrated map used as the reference map for QTL projection including Wenzl et al. (2006), RWA (ND19119-5/PI 642914) and ND24260/Flagship maps, including a total of 3,476 markers positions (XLS 385 kb)
122_2014_2291_MOESM2_ESM.docx (24 kb)
Supplementary material 2 (DOCX 25 kb)


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Copyright information

© Springer-Verlag Berlin Heidelberg 2014

Authors and Affiliations

  • L. A. Ziems
    • 1
  • L. T. Hickey
    • 1
  • C. H. Hunt
    • 2
  • E. S. Mace
    • 2
  • G. J. Platz
    • 2
  • J. D. Franckowiak
    • 2
  • D. R. Jordan
    • 3
  1. 1.Queensland Alliance for Agriculture and Food InnovationThe University of QueenslandSt LuciaAustralia
  2. 2.Department of Agriculture, Fisheries and ForestryHermitage Research FacilityWarwickAustralia
  3. 3.Queensland Alliance for Agriculture and Food Innovation, Hermitage Research FacilityThe University of QueenslandWarwickAustralia

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