Fig. 5 From:Plastome phylogenomic study of Gentianeae (Gentianaceae): widespread gene tree discordance and its association with evolutionary rate heterogeneity of plastid genes 通用电气netic variation among plastid protein-coding genes (PCGs) and among functional groups.aNucleotide diversity (π) and percent variability (PV) of 76 PCGs.bNucleotide diversity (π),cpercent variability (PV) anddgene length of functional groups Back to article page