Resistance of tomato F1 hybrids to grey mold

Abstract

BIOTIC STRESSESinoculation. Contrastingly, only the leaflet of L.peruvianum LA2745 remained green in color, and its lesion rarely expanded from the inoculated point even two weeks after inoculation. The results were reconfirmed by repeated experiments. The correlation coefficient between susceptibilities of the leaflet and the stem was very small (r=-0.127ns). However, L. peruvianum LA2745, L. hirsutum LA2314, and L. pimpinellifolium LA1246 showed a high level of resistance, both in the leaflet and stem. Although Solanum lycopersicoides, a wild relative species of tomato, was reported to possess resistance to the gray mold (Gradziel and Robinson 1989), S. lycopersicoides accession LA2386 used in the present study failed to show high resistance either in the leaflet or in the stem. Recently, hybrids between cv. 'Sekaiichi' (~br short, SK) and LA2745, and between SK and LA 1246 have been raised. The leaflet of the hybrids of LA2745 indicated on as high resistance as LA2745, while the leaflet of the hybrids of LA1246 was not so high in resistance. Then, it was suggested that the resistance of LA2745 is controlled not by the environmental factor(s), but by the dominant genetic factor(s). ReferencesGradziel T. M., Robinson R. W. 1989. Solanum lycopersicoides gene introgression to tomato, Lycopersicon esculentum, through the systematic avoidance and suppression of breeding barriers. Sex. Plant Reprod. 2: 43-52. O'Neill T. M. 1994. Resurgence of tomato stem Botrytis. Grower 122: 54-55. Urbascb I. 1986. Resistenz verschiedener Kultur-und Wildtomatenpflanzen (Lycopersicon spp.) gegenuber Abstract A two-year estimation of Botrytis cinerea stem damage of 299experimental Flhybrids grown in 2 rotations: winter-autumn and summer-autumn was carried out. The estimation was made in a period of mass fruitage.As a result it was shown, that the hybrids with determinate type of growth (sp) are damaged more strongly than indeterminate ones (sp +). An average disease severity in the first group was 2.8 against 2.3 in the second one using a scale 0-4. Number of strongly injured (2.5-4) plants in each group were 44.1% and 30.7 % and number of moderate resistant (0-1.5 numbers) plants were 10 % and 8.5 % accordingly.The analysis of resistance of F1 hybrids determined significant influence of parental.lines on a degree of a damage of plant stems by B. cinerea.

Highly efficient genomics-assisted development of a library of introgression lines of Solanum pimpinellifolium

“…Specifically, S. pimpinellifolium L., the species most closely related to S. lycopersicum, has been extensively used as a source of genetic variability for disease resistance to tomato yellow leaf curl virus (TYLCV) (Chagué et al 1997), Fusarium oxysporum f.sp. lycopersici (Bournival et al 1989), Cladosporium fulvum (Stevens and Rick 1986), Botrytis cinerea (Ignatova et al 2000), Pseudomonas syringae (Pitblado et al 1984), Phytophothora infestans (Chunwongse et al 2002), Globodera rostochiensis, and Globodera pallida (Ellis and Maxon-Smith 1971), as well as for fruit quality traits . Additionally, several S. pimpinellifolium accessions have been identified as potential sources of abiotic stress tolerance (Monforte et al 1996;Foolad 2005).…”

Synthesis and Antifungal Activity of 2-(4-Chlorophenylcarbamoyl)phenyl Acetate

“…Over the past decades, synthetic fungicides including carbendazim have been used to prevent it. Nevertheless, the development of its resistance to all the fungicides has reduced the efficacy of fungicidal treatment [10][11][12][13][14][15][16] . Therefore, new fungicides are continually required.…”

Screening and Selection for Herbicide Tolerance among Diverse Tomato Germplasms

“…Another accession that showed low injury to dicamba was TOM13 (7.3%), which belongs to the species pimpinellifolium, and is more specifically used to combat biotic stresses such as tomato yellow leaf curl virus, Botrytis cinerea, and Fusarium oxysporum f.sp. lycopersici [34,35]. Additionally, TOM13 has been found to have some drought-tolerant traits [36].…”