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Isolation and identification of pathogenic strains of tomato mosaic virus by host passage



Isolation and identification of pathogenic strains of tomato mosaic virus by host passage



Netherlands Journal of Plant Pathology 91(6): 285-294



Three isolates of tomato mosaic virus, A.8, SJ-64 and SLa, assumed to contain the pathogenic strains 1 and 2, were each subjected to selection pressure by passage through different hosts in concurrent series. The sub-isolates obtained were tested at intervals on differential tomato [Lycopersicon esculentum] lines heterozygous for each of the resistance genes Tm-1 and Tm-2 and for the combination of Tm-1 and Tm-2. Three preliminary passages through Solanum pennellii followed by 22 passages through the tomato line 'CStMW-18' (Tm-1/Tm-1) resulted for A.8, SJ-64 and SLa in sub-isolates of strain 1. Three preliminary passages through L. peruvianum P.I. 128655 followed by 22 passages through the tomato line 'Perou-2' (Tm-2/Tm-2) resulted for A.8 and SLa in sub-isolates of strain 2 and for SJ-64 in a sub-isolate of strain 1.2. Twenty passages through 'Perou-2' followed by two additional passages through the tomato line 'Craigella Tm-1/+Tm-2/+' resulted for SJ-64 and SLa in sub-isolates of strain 1.2 and for A.8 in a sub-isolate of strain 2.

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Accession: 001397543

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DOI: 10.1007/bf02000015



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