Expression patterns of T. cacao selected embryogenesis and stress related genes regulated during cacao zygotic (ZE) and somatic (SE) embryo maturation. (A) Expression patterns of 8 selected transcription factor genes described to be involved in embryogenesis in other plant species. Data represents normalized expression values from microarray analysis in all developmental stages of ZE (T, EF, LF and M) and SE (LT-SE and M-SE). (B) Three ethylene-signaling genes were randomly chosen for qRT-PCR analysis and patterns were compared to microarray results. Correlation coefficients (r) between microarray and qRT-PCR are indicated.