Tomato strains of tabacco mosaic virus isolated from heterozygous resistant tomato [Lycopersicon esculentum] 'Momotarou' in Okayama prefecture [Japan]
1998
Inoue, K. (Okayama-ken. Agricultural Experiment Station, San-yo (Japan)) | Date, H. | Kasuyama, S.
A typical mosaic and malformation symptom was found on heterozygrous resistant tomato "Momotarou" in Okayama prefecture. Electron microscopic examination, inoculation to a series of differential hosts and immunodiffution test revealed that the causal virus was tomato strain of tobacco mosaic virus (TMV). Two isolates were identified as Pelham's strain 0, and four isolates were identified as strain 1 on the basis of their reaction to the differential varieties of tomato. This is the first report of a strain 1 in Okayama prefecture. Both of isolates caused top necrosis on heterozygrous resistant varieties carrying Tm-2a gene. But these isolates caused no visible reaction on homozygous resistant varieties carrying Tm-2 or Tm-2a gene, and heterozygrous resistant varieties carrying both Tm and Tm-2 genes
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