Fig. 3

Chromosomal localizations and gene duplications of the ZmPUB family genes (A), collinearity analysis with Arabidopsis and rice (B-D). A The scale represents megabases (Mb), and the chromosome number is shown at the top of each bar. The protein sequences encoded by straight-line junction genes are more than 70% similar. B Collinearity relationships of U-box genes in maize. C Collinear relationships between U-box genes in maize and Arabidopsis thaliana. D Collinearity relationships between U-box genes in maize and rice. Blue lines represent collinear gene pairs of the PUB gene family. The inner circular heatmap represents gene density. The outer circles with scales represent chromosomes