Figure 1

Clustering of 9284 differentially expressed genes (DEGs). (A) Hierarchical clustering of two biological replicate samples of wheat grain development. The medians of twelve expression values were used to cluster the samples (see Methods). Stages are shown as °Cdays and days after anthesis (DAA). Scale bar: 0.5 cm. A paired t-test analysis (p < 0.01, adjusted Bonferroni correction) was performed to identify the genes whose expression levels changed significantly during the transitions between [40-80] and [120-500° Cdays]. Pie chart classifications for biological processes were inferred from various sources (see Methods). Unclassified UniGenes were omitted from the pie charts: the number of GO terms is shown in bracket next to the chart. (B) Pearson's correlation coefficient matrix of the clusters in panel (A).