Fig. 4

Hierarchical clustering and gene ontology analysis of DEGs in heads. (A) Heatmap of the expression patterns of the 5737 DEGs identified in heads. Seven clusters containing genes sharing similar expression profiles were identified. The relative expression of each gene (row) between each time point (column) ranges from low (dark blue) to high (yellow). (B) Gene ontology enrichment analysis was performed for each cluster. Statistically enriched GO terms for Biological Process are ranked with barplots according to their p-value and the number of genes associated with each term is indicated at the end of the barplot. Only enriched GO terms with a p-value < 0.01 are represented in the figure. No significant GO terms enrichment could be observed for cluster 6