[EN] Volatile organic compounds (VOCs) are major determinants of fruit flavor, a primary objective in tomato breeding. A recombinant inbred line (RIL) population consisting of 169 lines derived from a cross between Solanum lycopersicum and a red-fruited wild tomato species Solanum pimpinellifolium accession (SP) was characterized for VOCs in three different seasons. Correlation and hierarchical cluster analyses were performed on the 52 VOCs identified, providing a tool for the putative assignation of individual compounds to metabolic pathways. Quantitative trait locus (QTL) analysis, based on a genetic linkage map comprising 297 single nucleotide polymorphisms (SNPs), revealed 102 QTLs (75% not described previously) corresponding to 39 different VOCs. The SP alleles exerted a positive effect on most of the underlying apocarotenoid volatile QTLs-regarded as desirable for liking tomato-indicating that alleles inherited from SP are a valuable resource for flavor breeding. An introgression line (IL) population developed from the same parental genotypes provided 12 ILs carrying a single SP introgression and covering 85 VOC QTLs, which were characterized at three locations. The results showed that almost half of the QTLs previously identified in the RILs maintained their effect in an IL form, reinforcing the value of these QTLs for flavor/aroma breeding in cultivated tomato. We thank Erika Moro for valuable help in volatile analysis of the ILs. WB was supported by a fellowship granted by the Universidad de Costa Rica and CSIC-Spain by way of a collaboration agreement between CSIC/UCR. Volatile profiling was performed in the Metabolomic facilities of the IBMCP, CSIC (Spain). This work was supported in part by the Spanish MINECO Project AGL2015-65246-R co-financed by EU FEDER, MINECO Project AGL2011-26957, and the Bilateral agreements of Scientific and Technological Cooperation between the Spanish National Research Council (CSIC) and the Italian National Research Council (CNR). Funding for this project was provided through TRADITOM. TRADITOM has received funding from the European Union's Horizon 2020 research and innovation programme under grant agreement No 634561. Networking activities were supported by COST action Fruit Quality FA 1106. Rambla Nebot, JL.; Medina, A.; Fernández Del Carmen, MA.; Barrantes, W.; Grandillo, S.; Cammareri, M.; López Casado, G.... (2016). Identification, introgression, and validation of fruit volatile QTLs from a red-fruited wild tomato species. Journal of Experimental Botany. 68(3):429-442. https://doi.org/10.1093/jxb/erw455 Alba, J. M., Montserrat, M., & Fernández-Muñoz, R. (2008). 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Identification, introgression, and validation of fruit volatile QTLs from a red-fruited wild tomato species

Abstract