A hierarchical clustering of the 322 probesets according to their expression patterns in different organs. The 322 probesets correspond to 256 unigenes screened by DDD. The hierarchical cluster color code: the largest values are displayed as the reddest (hot), the smallest values are displayed as the bluest (cool), and the intermediate values are a lighter color of either blue or red. Pearson correlation clustering was used to group the developmentally regulated genes. The vertical green bars on the right mark the genes which show specificity in the 22 DAP caryopsis while the black one marks the genes which show specificity in the 3-5 DAP caryopsis.