Quantitative resistance to Botrytis cinerea from Solanum neorickii |
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Authors: | Richard Finkers Yuling Bai Petra van den Berg Ralph van Berloo Fien Meijer-Dekens Arjen ten Have Jan van Kan Pim Lindhout Adriaan W. van Heusden |
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Affiliation: | (1) Graduate School Experimental Plant Sciences, Laboratory of Plant Breeding, Wageningen University, PO box 386, Wageningen, 6700 AJ, The Netherlands;(2) Laboratory of Phytopathology, Wageningen University, PO Box 8025, Wageningen, 6700 EE, The Netherlands;(3) Instituto de Investigaciones Biologicas, Facultad de Ciencias Exactas y Naturales, Universidad Nacional de Mar del Plata, cc 1245 (7600) Mar del Plata, Argentina;(4) De Ruiter Seeds, PO box 1050, Bergschenhoek, 2660 BB, The Netherlands |
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Abstract: | Tomato (Solanum lycopersicum) is susceptible to gray mold (Botrytis cinerea). Quantitative resistance to B. cinerea was previously identified in a wild relative, S. neorickii G1.1601. The 122 F3 families derived from a cross between the susceptible S. lycopersicum cv. Moneymaker and the partially resistant S. neorickii G1.1601 were tested for susceptibility to B. cinerea using a stem bioassay. Three putative quantitative trait loci (pQTL) were detected: pQTL3 and pQTL9 reducing lesion growth (LG) and pQTL4 reducing disease incidence (DI). For each pQTL, a putative homologous locus was identified recently in another wild tomato relative, S. habrochaites LYC4. pQTL3 was confirmed by assessing disease resistance in BC3S1 and BC3S2 progenies of S. neorickii G1.1601. pQTL4 was not statistically confirmed but the presence of the S. neorickii resistance allele reduced DI in all three tested populations. The reduction in LG of pQTL9 was not confirmed but rather, this locus conferred a reduced DI, similar to observations in the QTL study using S. habrochaites. The results are discussed in relation to other disease resistance loci identified in studies with other wild tomato relatives. |
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Keywords: | Botrytis cinerea Gray mold Quantitative trait locus (QTL) S. neorickii Marker assisted selection (MAS) |
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