ISHS Acta Horticulturae 487: VI International Symposium on Processing Tomato & Workshop on Irrigation & Fertigation of Processing Tomato
TOLERANCE TO BOTRYTIS CINEREA |
| Authors: | R.T. Chetelat, L. Stamova |
| Keywords: | Tomato, disease resistance, gray mold, Botrytis cinerea, Solanum lycopersicoides, Lycopersicon chilense |
| Abstract:
We know of few reports of resistance to Botrytis cinerea (gray mold) in tomato. This situation led us to search for resistance in accessions of wild Lycopersicon and Solanum species, and their hybrids with L. esculentum. The latter included sesquidiploid and diploid L. esculentum x S. lycopersicoides hybrids, some backcross derivatives thereof, L. chilense LA1932, and Bulgarian breeding lines derived from L. chilense. The screening method involved inoculation of cut petiole surfaces of stem cuttings with agar plugs containing B. cinerea mycelia. The diameters of lesions at 6 days were roughly 3 times greater on L. esculentum ‘VF36’ than on cuttings from the intergeneric hybrids. Some of the derivatives from the backcross to L. esculentum showed apparent stem tolerance as well as tolerance in a leaf injection assay. A high level of tolerance to stem and leaf infection was also found in L. chilense LA1932, as well as in some of the Bulgarian lines. Some of these breeding lines also showed a high level of tolerance to fruit infection with B. cinerea. | |
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