Fig. 2

Functional annotation of differentially expressed genes (DEGs) at different seed development stages. a GO enrichment analysis of DEGs. Genes were assigned into three main categories: biological processes, cellular components or molecular functions. The y-axis indicates the number of genes in a given category. b Scatterplot of GO biological process involved in lipid metabolism. c Histogram of cluster of KEGG pathways of DEGs. The results were summarized in five main categories (black words). d Scatterplot of KEGG pathway involved in lipid metabolism. Rich Factor refers to the ratio of the differentially expressed gene number and the number of genes annotated in this pathway and large Rich Factor indicates high degree of enrichment. The area of each colored circle is proportional to the number of genes involved in each pathway, the color indicated the p value, and the x-axis is the Rich Factor