Fig. 4

Mapping of BAC-defined SUs onto the idiograms of haploid female chromosome sets of eight Trematomus species. Karyotypes with identified SUs and fusions are plotted against the Trematomus phylogeny [8]. Orthologous SUs are shown in the same color. Four species (T. nicolaï, T. hansoni, T. borchgrevinki and T. newnesi) have sex-differentiated chromosomes (X1X1X2X2 (female) / X1YX2 (male)). The haploid female chromosome number of each is presented, while asterisks indicate when male (chromosomal formulae: 2n-1), and the male chromosome (Y) is shown on the right side of the corresponding karyotype. Total numbers of fusions (cfu, centric fusion; tfu, tandem fusion) or fissions (fi) are indicated (based on female karyotypes) for the six species that deviate from n = 24. Specific BAC designations are given next to their locations on chromosomes. Note that BACs F3, F7 and •F22 were not mapped to N. coriiceps SUs in Fig. 2