Figure 5:

Chromosome synteny. A. Alignment of king scallop and blood clam chromosomes. B. Alignment of king scallop and hard-shelled mussel chromosomes. C. Alignment of king scallop and pearl oyster chromosomes. D. Alignment of king scallop and Pacific oyster chromosomes. E. Rearrangements between the chromosomes of king scallop and those of 4 other bivalve species. The king scallop chromosomes are represented by bars of different colors, and synteny and rearrangements in the chromosomes of the 4 other bivalves are indicated by different blocks, whose colors correspond to those of the reference king scallop chromosomes; the dashed lines indicate the corresponding evolutionary relationship. F. Alignment of hard-shelled mussel and blood clam chromosomes. G. Alignment of hard-shelled mussel and pearl oyster chromosomes. H. Alignment of hard-shelled mussel and Pacific oyster chromosomes. The king scallop linkage groups are labeled as PM 1–19, the blood clam chromosomes as SB 1–19, the hard-shelled mussel chromosomes as MC 1–14, the pearl oyster chromosomes as PF 1–14, and the Pacific oyster chromosomes as CG 1–10. Scale unit, Mb. A–D, F–H. The circularized blocks represent the chromosomes of the 5 bivalves. Aligned homologous genes are connected by ribbons, shown in different colors depending on their chromosome location.