Figure 1.

Chromosomal distribution of Chinese perch OR genes. The majority of Chinese perch OR genes were organized in eight clusters on five chromosomes. The other 13 OR genes were located on four scaffolds. The position of each cluster is shown above the chromosomes, in Mb. The numbers of functional genes and pseudogenes in each cluster are shown below the chromosomes/scaffolds. OR genes are depicted as filled triangles (functional genes) and hollow triangles (pseudogenes). Triangles pointing to the right mean the + strand; triangles pointing to the left mean the − strand; the OR gene distance is drawn to scale. Genes are colored according to their group.