Figure 2. Hierachical clustering analysis of 369 differently expressed genes. Each horizontal row indicates a gene, and each vertical column represents a colony. In the top of the figure, the tree diagram represents the eight colony samples, which are divided into two groups: high royal jelly producing bees (HRJB) and low royal jelly producing bees (LRJB). Red represents up-regulated genes in HRJB; green represents down-regulated genes in HRJB. Light shades reflect different levels of up- or down-regulated genes.