Molecular cytogenetic characterization of four partial wheat-Thinopyrum ponticum amphiploids and their reactions to Fusarium head blight, tan spot, and Stagonospora nodorum blotch

  • R. E. Oliver
  • S. S. Xu
  • R. W. Stack
  • T. L. Friesen
  • Y. Jin
  • X. Cai
Original Paper


Four wheat (Triticum aestivum L.)-Thinopyrum ponticum derivatives SS5 (PI604926), SS156 (PI604947), SS363 (PI604970), and SS660 (PI604879), were identified as resistant to Fusarium head blight (FHB), a serious fungal disease of wheat worldwide. Seedling reactions to tan spot and Stagonospora nodorum blotch (SNB), two important foliar diseases of wheat, suggest that these four derivatives are resistant to tan spot and two of them (SS5 and SS156) are resistant to SNB. Fluorescent genomic in situ hybridization (FGISH) patterns of mitotic chromosomes indicate that these four derivatives are partial wheat-Th. ponticum amphiploids, each with a total of 56 chromosomes, though with different amounts of Th. ponticum chromatin. These four amphiploids were hybridized with each other to determine homology between the Th. ponticum genomes in each of the amphiploids. Analysis of chromosome pairing in the F1 hybrids using FGISH suggests that each amphiploid carries a similar set of Th. ponticum chromosomes. These wheat-Th. ponticum amphiploids represent a potential novel source of resistance to FHB, tan spot, and SNB for wheat breeding.


Fusarium Head Blight Wheat Chromosome Fusarium Head Blight Resistance Susceptible Control Fusarium Head Blight Severity 
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.



We wish to thank Kay Carlson and Jana Hansen for their invaluable technical assistance. This project was supported by the US Wheat and Barley Scab Initiative and by the North Dakota State Board of Agricultural Research and Education.


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Copyright information

© Springer-Verlag 2006

Authors and Affiliations

  • R. E. Oliver
    • 1
  • S. S. Xu
    • 2
  • R. W. Stack
    • 3
  • T. L. Friesen
    • 2
  • Y. Jin
    • 4
  • X. Cai
    • 1
  1. 1.Department of Plant Sciences, 166 Loftsgard HallNorth Dakota State University (NDSU)FargoUSA
  2. 2.United States Department of Agriculture-Agricultural Research Service (USDA-ARS)Northern Crops Science LaboratoryFargoUSA
  3. 3.Department of Plant Pathology, 355 Walster HallNDSUFargoUSA
  4. 4.USDA-ARSCereal Disease LaboratorySt. PaulUSA

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