Fig. 1

Permutation for Strain 8, 17 and 20. Each orange block stands for one or several consecutive synteny blocks. The integers above each orange block indicate the included synteny blocks, for example, -14\(\thicksim \)-6 means the orange block includes the synteny blocks from Block -14 to -6 on the permutation. Inverted repeat +A and -A is represented by triangles respectively. The arrow directions indicate the sign of each block