Fig. 3

Phylogenetic relationships, exon-intron and motif structures of wheat expansin genes. a The rooted Bayesian phylogenetic tree was reconstructed based on a complete protein sequence alignment of 241 expansin genes identified using MrBayes 3.2. Subclades colors indicate the three corresponding gene subfamilies. b Exon-intron structures of the expansin genes. Boxes: exons; lines: introns. The lengths of boxes and lines are scaled based on gene length. c MEME motif search results. Conserved motifs are indicated in numbered, colord boxes