Archivio Journal of Plant Pathology

Abstract:

The online version of the original article is available at: http://www.sipav.org/main/jpp/volumes/0309/030919.pdf Unfortunately a mistake was made in the determination of the vegetative compatibility group (VCG) of a number of isolates of Verticillium dahliae, published in the above mentioned paper. Isolates of V. dahliae were typed as VCG 4A due to problems with some tester isolates. When we became aware of the problem, new tester isolates [VCG 4A (BB, P103) and VCG 4B (S-39, MT)] were secured from Dr. M.M. Jimenez-Gasco (Department of Plant Pathology, The Pennsylvania State University, University Park, PA 16802, USA) and the vegetative compatibility of the isolates previously typed as VCG 4A was re-evaluated. All nit mutants of VCG 4 were paired with nit mutants of the new tester isolates of VCG 4A and 4B. Cross-reactions occurred between VCG 4 isolates from weeds and tester isolates of VCG 4 (subgroups A and B). VCG 4 isolates showed strong complementation with tester isolates of VCG 4B, but all were also weakly compatible with tester isolates of VCG 4A. Therefore, all VCG 4 isolates recovered from weeds in Erzurum were re-classified as VCG 4B. Likewise, all VCG 4A isolates obtained from potato plants in Erzurum (Dane, 2007) were re-evaluated and re-classified as VCG 4B. The authors would like to inform the readers of the Journal of Plant Pathology of this unfortunate mistake and apologize for any inconvenience caused.