Fig. 3

K-means clustering of DEGs. a, b Twelve clusters of a SWUK3 and b SWUK4 based on FPKM values at seven seed developmental stages. c, d GO enrichment analysis results for genes in c cluster 2 of SWUK3 and d cluster 4 of SWUK4. e Heatmap of expression of cell cycle core genes in B. rapa. Gene expression levels were transformed with the log₂(FPKM + 1). All genes are listed in Additional file 1: Table S7