Visualization of comparative sea bass BAC map on 21 stickleback chromosomes. Green regions represent BAC-contigs, which are covered on average 5.25 fold by consistently mapped BAC-clones. In total 87.0% of the stickleback chromosomes and 85.4% of annotated genes are covered by the BAC-contigs. Regions with weak mapping results are shown in red and mainly due to repetitive regions like centromeric or telomeric regions, where it is hard to consistently align both BAC-ES. Nevertheless BACs having good matches with one end may be found in these regions. Most of the stickleback chromosomes can be assigned to sea bass genetic linkage groups (see Table 2A, Table 3A and Table 4A).