Fuente: WIPO "tomato" The present invention is in the field of tomato plant growth and development, particularly relating to positive non-additive (epistatic) interactions between quantitative trait loci (QTLs) conferring enhanced productivity and drought tolerance via heterosis in tomato plants, particularly of the species Solanum lycopersicum. According to certain aspects, the present invention provides a tomato crop plant comprising within its genome one or more exogenous genetic elements comprising a quantitative trait locus (QTL) derived from chromosome 1 (Chr-1 QTL) and a QTL derived from chromosome 7 (Chr-7 QTL) of Solanum pennellii Lost Accession LA5240.