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High Genetic Diversity Among Strains of Fusarium oxysporum f. sp. vasinfectum from Cotton in Ivory Coast

December 2005 , Volume 95 , Number  12
Pages  1,391 - 1,396

Kouabenan Abo , Keith K. Klein , Véronique Edel-Hermann , Nadine Gautheron , Dossahoua Traore , and Christian Steinberg

First and fifth authors: Institut National Polytechnique Félix Houphouët Boigny (INP-HB), BP 1313, Yamoussoukro, Ivory Coast; second author: Department of Biological Science, Minnesota State University, Mankato, TRS242, Mankato 56001; and third, fourth, and sixth authors: UMR Microbiologie et Géochimie des Sols, INRA-Université de Bourgogne, CMSE, 17 rue Sully, 21065 Dijon Cedex, France

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Accepted for publication 10 July 2005.

Seventeen isolates of Fusarium oxysporum f. sp. vasinfectum from the Ivory Coast were characterized using vegetative compatibility group (VCG), restriction fragment length polymorphism of the ribosomal inter-genic spacer region (IGS), and mating type (MAT) idiomorph, and compared with a worldwide collection of the pathogen containing all available reference strains. Some of the isolates were identical to known reference strains for all three traits, whereas others had previously unknown varieties of IGS and (possibly) VCG. One or the other MAT idiomorph was present in each of the new isolates and the reference strains. The new isolates and reference strains were grouped based upon the three traits. Strains from the Ivory Coast were found in 7 of 11 groups detected, suggesting multiple sources for Fusarium wilt in the country. Despite the presence of both MAT idiomorphs among isolates, no evidence for recombination was found.

The American Phytopathological Society, 2005