Theoretical and Applied Genetics

, Volume 111, Issue 2, pp 313–324 | Cite as

Quantitative trait loci for partial resistance to crown rust, Puccinia coronata, in cultivated oat, Avena sativa L.

  • V. A. Portyanko
  • G. Chen
  • H. W. Rines
  • R. L. Phillips
  • K. J. Leonard
  • G. E. Ochocki
  • D. D. Stuthman
Original Paper


To facilitate the detection of quantitative trait loci (QTLs) for partial resistance to oat crown rust, Puccinia coronata f. sp. avenae Eriks., a genetic map was generated in a population of 158 F6-derived oat recombinant inbred lines from a cross of a partial resistance line MN841801-1 by a susceptible cultivar selection ‘Noble-2’. The map, developed using 230 marker loci, mostly restriction fragment length polymorphism and amplified fragment length polymorphism markers, spanned 1,509 cM (Haldane) arranged into 30 linkage groups of 2–18 markers each. Four consistently detected major QTLs for partial rust resistance, Prq1a, Prq1b, Prq2, and Prq7, and three minor QTLs, Prq3, Prq5, and Prq6, were found in tests involving three field and two greenhouse environments. In addition, two major QTLs for flowering time, Ftq1 and Ftq7, and five weaker QTLs, Ftq2, Ftq3, Ftq4, Ftq5, and Ftq6, were revealed. Overlapping of the map segments of Ftq1 and Prq1 and of Ftq7 and Prq7 suggested either linkage between the flowering time QTLs and resistance QTLs or a pleiotropic effect of the Ftq QTLs on rust resistance. Relatively low heritability estimates (0.30) obtained for partial resistance to crown rust in the field indicate a potential value for marker-assisted selection.


Linkage Group Amplify Fragment Length Polymorphism Rust Resistance Partial Resistance Composite Interval Mapping 
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 in part by the Quaker Oats Company, Chicago, Ill. We thank Suzanne Livingston, Roger Caspers, and Richard Halstead for excellent technical assistance.


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Copyright information

© Springer-Verlag 2005

Authors and Affiliations

  • V. A. Portyanko
    • 1
  • G. Chen
    • 2
    • 6
  • H. W. Rines
    • 3
  • R. L. Phillips
    • 4
  • K. J. Leonard
    • 5
    • 7
  • G. E. Ochocki
    • 5
  • D. D. Stuthman
    • 2
  1. 1.Department of Plant BiologyUniversity of MinnesotaSt. PaulUSA
  2. 2.Department of Agronomy and Plant GeneticsUniversity of MinnesotaSt. PaulUSA
  3. 3.US Department of Agriculture, Agricultural Research Service, Department of Agronomy and Plant GeneticsUniversity of MinnesotaSt. PaulUSA
  4. 4.Department of Agronomy and Plant Genetics, Center for Microbial and Plant GenomicsUniversity of MinnesotaSt. PaulUSA
  5. 5.Cereal Disease Laboratory, US Department of AgricultureAgricultural Research ServiceSt. PaulUSA
  6. 6.Cereal Research CentreAgriculture and Agri-Food CanadaWinnipegCanada
  7. 7.Department of Plant PathologyUniversity of MinnesotaSt. PaulUSA

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