Fig. 3. Genome structure and shared genomic content of related adelgid symbionts.

A Genome synteny comparisons of adelgid symbionts with similar ancestors. Each line between two chromosomes links a pair of colinear genes found in syntenous blocks of a minimum of five genes. Bars representing genomes are scaled within synteny plots of each pairwise comparison. The Annandia genomes are perfectly colinear, the Vallotia genomes exhibit several rearrangements, and Ecksteinia and Gillettellia exhibit little synteny. B Venn diagrams displaying shared and unshared protein-coding genes between each pair. Circle overlaps represent the numbers of orthologs shared between species, and numbers outside overlaps show unshared genes (paralogs or singletons). Circles are sized to approximate the number of genes in each genome.