Fig. 1
From: GC heterogeneity reveals sequence-structures evolution of angiosperm ITS2
Variation of ITS2 GC content across the 165 angiosperm phylogeny. The three dotted-line circles outside the circular tree represent the GC content intervals, in which the GC boxplots are added behind their generic names. The phylogeny was constructed by using the NCBI taxonomy, which is based on the APG system. The main orders are highlighted with color blocks. The mean ITS2 GC content of each order is indicated by a pink line, and the width of the line represents the 95% confidence interval