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Identification of Resistance to Potato yellow mosaic virus-Trinidad Isolate (PYMV-TT) Among Lycopersicon Species

Rampersad, S.N., Umaharan, P.
Plant disease 2003 v.87 no.6 pp. 686-691
Solanum, Tomato mottle virus, Tomato yellow leaf curl virus, assays, breeding lines, cultivars, germplasm, nucleic acid hybridization, plant pathology, potatoes, screening, tomatoes
Three studies were carried out with the objective of identifying resistance to Potato yellow mosaic virus-Trinidad isolate (PYMV-TT) among Lycopersicon species through field screening and using field-inoculated infector rows. The presence of PYMV-TT was confirmed using dot blot hybridization assays. In the first study, eight commercial cultivars of tomato were tested for resistance. In a subsequent study, 11 breeding lines showing high levels of resistance to Tomato mottle virus (ToMoV-Florida) and six lines resistant to Tomato yellow leaf curl virus (TYLCV-Old World Begomovirus) were screened for resistance to PYMV-TT. All breeding lines and the commercial cultivars tested were susceptible to PYMV-TT infection. The third study involved screening 92 accessions from a representative core collection of wild Lycopersicon germ plasm. PYMV-TT was not detected in individuals of 22 accessions.