ISHS Acta Horticulturae 412: I International Symposium on Solanacea for Fresh Market
AGRONOMIC BEHAVIOR OF TOMATO CULTIVARS AND LINES RESISTANT TO TSWV AND INFLUENCE OF INOCULATION METHODS |
| Authors: | M.J. Díez, S. Roselló, . , . , A. Lacasa, C. Jordá, J. Costa |
| Keywords: | mechanical inoculation, thrips transmission, resistance, tolerance, Lycopersicon spp. |
| Abstract:
In 1993 and 1994, the Argentinian tomato cultivars 'Quilquil', 'Nuco', 'Uco Plata' and 'Pitihué' were cultivated under fielld conditions in Mucia (Spain). The cultivars had different degrees of resistance depending on the patotypes present in the field. Lines 'RDD', 'UPV-101' and 'UPV-200', carriying resistance genes from L. peruvianum, were also tested. The incidence of TSWV was negligible in all the above materials, and much lower than that recorded for the susceptible varieties used as controls. Hybrids between susceptible breeding lines and tolerant used and resistants genotypes were made and tested, and gave the same response as their resistant parent. This resistance behavior means that hybrids can be successfully cultivated in areas with a high incidence of TSWV. Hybrids produced marketable yields even though some plants became infected by the end of the growing season. The Argentinian materials and 'RDD' were inoculated with different isolates mechanically, by viruliferous thrips and by natural inoculation in field conditions. The response was different depending on the genotype. Athough mild TSWV symtoms were observed in field conditions, some genotypes were susceptible when mechanical or viruliferous-thrips methods were used. | |
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