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Title: Molecular genetic classification of Fusarium oxysporum f. sp. vasinfectum races

Author
item DAVIS, R. MICHAEL - University Of California
item HOLMES, ELIZABETH - University Of California
item COLYER, PATRICK - Louisiana State Experiment Station
item Bennett, Rebecca

Submitted to: National Cotton Council Beltwide Cotton Conference
Publication Type: Abstract Only
Publication Acceptance Date: 10/8/2009
Publication Date: 4/29/2010
Citation: Davis, R., Holmes, E.A., Colyer, P.D., Bennett, R. 2010. Molecular genetic classification of Fusarium oxysporum f. sp. vasinfectum races. National Cotton Council of America, Memphis, TN. National Cotton Council Beltwide Cotton Conference, Atlanta, Georgia, January 4 to 7, 2010. p. 251.

Interpretive Summary:

Technical Abstract: An understanding of the pathogenic diversity present in a population of a given disease organism is necessary for the effective development and deployment of host-plant resistance. The need for rapid and accurate diagnostic tools for identifying races or genotypes of the Fusarium wilt pathogen, Fusarium oxysporum f. sp. vasinfectum, has increased since it was shown that populations in the United States are no longer limited to races 1 and 2. Multi-gene phylogenies have revealed the presence of races 3, 4, and 8, as well as four novel genotypes in the U.S. A DNA-based macroarray using the translation elongation factor gene was developed to rapidly and accurately identify races 1, 3, 4, 8, and Australian biotypes. A broad understanding of the genetic diversity of this fungus is a first step toward characterizing its pathogenic diversity.