Archives of Phytopathology and Plant Protection (2009) 42, 464-473

Kamel A. Abd-Elsalam, Moawad R. Omar, Abdel-Mongy Asran-Amal and Aly Abdel-Hady Aly (2009)
Differential interactions among cotton genotypes and isolates of Fusarium oxysporum f. sp. vasinfectum
Archives of Phytopathology and Plant Protection 42 (5), 464-473
Abstract: The pathogenicity of nine isolates of Fusarium oxysporum f. sp. vasinfectum (Fov) was evaluated on seedlings of 30 cotton (Gossypium barbadense L.) genotypes in 2005 and 2006. Isolate x genotype interaction was a highly significant (P < 0.01) source of variation in wilt incidence, suggesting that physiologic specialization exists within Fov isolates. Cluster analysis of aggressiveness of isolates and susceptibility of genotypes by the unweighted pair-group method based on arithmetic means (UPGMA) placed the isolates and the genotypes in several groups. Isolates were separated into two distinct groups. One group was closely related to race 5 while the other group was closely related to race 1. Cluster analysis also demonstrated that the Egyptian commercial cultivars had unique susceptibility patterns to Fov isolates remotely related to those of the other genotypes. The interaction between experiments of 2005 and 2006 was mainly due to a differential effect of years on the disease incidence for cotton cultivars.
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Link to article at publishers website
Database assignments for author(s): Kamel Ahmed Abd-Elsalam

Research topic(s) for pests/diseases/weeds:
general biology - morphology - evolution

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Pest and/or beneficial records:

Beneficial	Pest/Disease/Weed	Crop/Product	Country	Quarant.
	Fusarium gossypinum	Cotton (Gossypium)