Fig. 5

Schematic representations of the interchromosomal relationships of the expansin genes from different plants. a Analysis of the interchromosomal relationships of the expansin genes from Tartary buckwheat was conducted by using multiple collinear scanning toolkits (MCScanX) and was visualized by TBtools v1.082. Gray lines in the background indicate collinear blocks within the Tartary buckwheat genome, while red lines highlight syntenic expansin gene pairs. b Analysis of the interchromosomal relationships of the expansin genes from A. thaliana was conducted by using multiple collinear scanning toolkits (MCScanX), and was visualized by TBtools v1.082. Gray lines in the background indicate collinear blocks within the A. thaliana genome, while red lines highlight syntenic expansin gene pairs. c Analysis of the interchromosomal relationships of the expansin genes from Vitis vinifera was conducted by using multiple collinear scanning toolkits (MCScanX), and was visualized by TBtools v1.082. Gray lines in the background indicate collinear blocks within the Vitis vinifera genome, while red lines highlight syntenic expansin gene pairs. d Analysis of the interchromosomal relationships of the expansin genes from Oryza sativa was conducted by using multiple collinear scanning toolkits (MCScanX), and was visualized by TBtools v1.082. Gray lines in the background indicate collinear blocks within the Oryza sativa genome, while red lines highlight syntenic expansin gene pairs. e KaKs_Calculator 2.0 was used to calculate the synonymous (Ks) and nonsynonymous (Ka) substitutions of each homologous expansin gene pair and their ratios (Ka/Ks). The results were visualized using TBtools v1.082