The enzyme activity QTLs (aQTLs) are sorted according to genotype and enzyme activity trait analyzed. The ANOVA results depict the percentage variation for the factors genotype (G), environment (E), and genotype-environment interaction (GxE). An introgression was considered harboring a QTL if a significant genotype (PG < 0.01) and a nonsignificant genotype-environment interaction (PGxE ≥ 0.01) were observed. The results of t test analyses show the phenotypic responses as agronomical percentage values for the field experiments in 2003 [R(IL) 2003] and 2004 [R(IL) 2004]. QTLs were considered if significant changes at P < 0.05 in the same direction were observed for both field experiments. The responses of the respective heterozygote ILs [R(ILH) 2004] and associated P values from t test analysis compared with M82 are displayed. The mode of inheritance was computed and classified as described (Semel et al., 2006) as follows: R, recessive; A, additive; D, dominant; ODO, overdominant effects. The sign indicates the direction of the observed phenotypic effect of the S. pennellii allele introgressed into the S. lycopersicum M82 genome. All significant changes are depicted as follows in each cell: * P < 0.05, ** P < 0.01.