Figure 3:

Evolution analysis of gene families in I. sinensis and 19 selected evolutionarily representative green algae and land plants. The phylogenetic tree was constructed from the ML method. The green numbers on the branches of the phylogenetic tree indicate the number of expanded gene families, and the red numbers refer to the number of constricted gene families. The supposed most recent common ancestor (MRCA) contains 46,317 gene families. Totals of 2,108 and 3,153 families had undergone expansion and contraction in I. sinensis, respectively. Only 1 subgenome of I. sinensis was used. The number in the blue circle indicates the retained duplicates from WGDs.