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James Kolmer
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Phone: (612) 626-1226 
Fax: (651) 649-5054 


Ph.D., Plant Pathology, North Carolina State University, 1985
M.S., Plant Pathology, University of Minnesota, 1982
B.S., Biology, St. John's University, MN, 1980


Research Projects:

  • Virulence and race dynamics of wheat leaf rust (Puccinia triticina) in the United States
  • Virulence and molecular (microsatellite-simple sequence repeat unit) characterization of U.S. and world-wide populations of Puccinia triticina
  • Characterization of Puccinia triticina isolates with different telial hosts
  • Genetics of leaf rust resistance in U.S. spring and winter wheat cultivars
  • Mapping of leaf rust resistance genes derived from wheat cultivars with durable resistance
  • Development of isogenic wheat lines with leaf rust resistance genes
  • Postulation of leaf rust resistance genes in U.S. wheat cultivars and advanced germplasm lines



Fig. 1.  Puccinia triticina (wheat leaf rust) infection types on flag leaves of Thatcher (susceptible) and Thatcher + Lr12 (resistant), Thatcher + Lr13 (resistant) and Thatcher + Lr34 (resistant). Fig. 2.  Seedling infection types of Puccinia triticina on isolines of Thatcher wheat.

Fig. 3.  Teliospores of Puccinia triticina. 

Fig. 4.  Life cycle of Puccinia triticina.
Fig. 5.  Microsatellite (single sequence repeat) alleles of Puccinia triticina isolates from common and durum wheat.  

Leaf rust resistance gene postulation in current U.S. wheat cultivars

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