Genomic features of the W. australiana genome and gene family evolution in W. australiana. A) Hi-C interaction matrix for the 20 W. australiana pseudochromosomes. B) Circos plot of the W. australiana genomic features: (a) distribution of 20 chromosomes (each bar represents one chromosome, and the number represents the chromosome length); (b) gene density; (c) repeat sequence density; (d) GC contents; (e) gene density of control transcriptome; (f) gene density of flowered transcriptome; (g) gene density of induced transcriptome; and (h) synteny and distribution of genomic regions across the W. australiana genome. C) Treemap for contig length difference of 20 chromosomes. D) Phylogenetic analysis of W. australiana and other plants. The single-cell green alga Chlamydomonas reinhardtii was used as outgroup. The value on each node represents the divergence time in millions of years (mya). Nodes marked red are published fossil calibration time points. Numbers marked in green/red represent expansion/contraction numbers on each branch. Photos on the right show the corresponding species. E) AGL flowering-related genes. F) Root-related SAUR genes.