Cluster analysis of expression profiles of 23 selected unigenes during longan SE. The bar represents the scale of relative expression levels of unigenes, and colors indicate relative signal intensities of unigenes. Each column represents a sample, and each row represents a single unigene. Samples: 1. EC; 2. ICpEC; 3. GE; 4. HE; 5. TE; 6. CE.