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United States Department of Agriculture

Agricultural Research Service

Research Project: INTEGRATED MANAGEMENT OF PESTS AFFECTING COTTON: PLANT GENETICS, BIOCONTROL, AND NOVEL METHODS OF PEST ESTIMATION Title: Molecular genetic classification of Fusarium oxysporum f. sp. vasinfectum races

Authors
item Davis, R. Michael -
item Holmes, Elizabeth -
item Colyer, Patrick -
item Bennett, Rebecca

Submitted to: National Cotton Council Beltwide Cotton Conference
Publication Type: Abstract Only
Publication Acceptance Date: October 8, 2009
Publication Date: April 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.

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.

Last Modified: 7/24/2014
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