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Occurrence of Resistance-breaking Populations of Root-knot Nematodes on Tomato in Greece |
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| Authors: | |
| Institution: | (1) Nematology Laboratory, Plant Protection Institute, National Agricultural Research Foundation, P.O. BOX 2228, 71003 Heraklion Crete, Greece;(2) Scottish Crop Research Institute, Plant Pathogen Interactions Program, Invergowrie, Dundee, DD2 5DA, UK;(3) Department of Environmental and Natural Resources Management, University of Ioannina, 30100 Agrinion, Greece |
| Abstract: | Nine populations of Meloidogyne spp. from Greece have been identified as M. javanica or M. incognita using either isozyme phenotypes or the sequence characterized amplified region-polymerase chain reaction (SCAR-PCR) technique. Virulence against the Mi resistance gene was assayed by pot experiments in controlled conditions and revealed the ability of five populations of M. javanica and one population of M. incognita to reproduce on tomato cultivars containing that gene. A resistance-breaking population of M. incognita is reported for the first time in the country; the M. javanica populations constitute new records for the Greek mainland. |
| Keywords: | identification isozyme phenotype Meloidogyne incognita Meloidogyne javanica Mi gene SCAR-PCR virulence |
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