In order to identify essential and critical metabolic pathways in oil biosynthesis and quality compounds, two strategies were performed according to literature review (first step) and metabolic pathways (second step) described in Unver et al., (2017). In the first strategy, all the identified differential expressed genes in the meta-analysis were used for pathway enrichment and then important pathways selected. In the second strategy, to select critical metabolic pathways in oil quality, differential expression genes obtained from the meta-analysis were blasted against 2327 effective genes in oil biosynthesis (Unver et al., 2017). The two steps led to enriching the pathways identified in each strategy. These steps were done separately for each comparison and selected common pathways between overall comparisons, pair comparisons, and specific to each comparison for the up and down-regulated genes (Table 1 and 2). Sixteen metabolic pathways were common between all growth stages for the up-regulated genes (Table 1). The pathways of fatty acids biosynthesis and their elongation were in common between C1 and C2. Furthermore, the most important individuated metabolic pathways were pentose phosphate, pyruvate metabolism, glycolysis/gluconeogenesis, fatty acid biosynthesis, fatty acid elongation, and biotin metabolism. The comparisons’ results also showed that the terpenoid compounds biosynthesis pathways were specific to C2 including limonene and pinene degradation, diterpenoid biosynthesis, and monoterpenoid biosynthesis (Table 1). In the metabolic pathways containing down-regulated genes, 23 metabolic pathways were common between all developmental stages (Table 2).