European Journal of Plant Pathology (2014) 140, 689-699

M.E. Göre, O. Erdogan, Ö.K. Caner, M.H. Aydin and S. Berk (2014)
VCG diversity and virulence of Verticillium dahliae from commercially available cotton seed lots in Turkey
European Journal of Plant Pathology 140 (4), 689-699
Abstract: Samples of seeds collected from commercially available cotton seed lots in Turkey were assayed for Verticillium dahliae. V. dahliae was successfully isolated from 67 of 104 seed lots tested, a successful isolation rate of nearly 65 %. Vegetative compatibility of the isolates was assessed through complementation tests using nitrate non-utilizing mutants. Of the 188 isolates obtained, 105 were classified as VCG1A, 17 as VCG2A, 64 as VCG2B and two as VCG4B. All 50 of the isolates tested in the greenhouse on cotton cv. DP 15–21 and Acala SJ-1 were pathogenic on both cultivars. As a group, AUDPC values were significantly higher (P < 0.05) for VCG1A than for VCG2 and VCG4B isolates. These data suggest that: (1) commercial cotton seed lots are commonly infected with V. dahliae and thus may serve as primary sources of the pathogen; (2) cotton isolates of V. dahliae belong to VCG1A, 2A, 2B and 4B and these strains are widely distributed via seed lots; and (3) VCG1 and VCG2 are distinct pathotypes of V. dahliae that vary in their virulence to cotton.
(The abstract is excluded from the Creative Commons licence and has been copied with permission by the publisher.)
Link to article at publishers website
Database assignments for author(s): Mehmet Erhan Göre

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

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Pest and/or beneficial records:

Beneficial	Pest/Disease/Weed	Crop/Product	Country	Quarant.
	Verticillium dahliae	Cotton (Gossypium)	Turkey