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United States Department of Agriculture

Agricultural Research Service

JAMES A. KOLMER (JIM)

Plant Pathologist

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 triticinaisolates 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 triticinaon 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 triticinaisolates from common and durum wheat.  

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

Publications available in pdf format

2014

2013

2012

2011

2010

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2007 

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1998

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1995 


Publications by CDL staff available in pdf format


Last Modified: 12/5/2013
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