Fig. 3

The Hydractinia X and Y linkage groups and sequences. Genomic positions of markers in the maternal (yellow) and paternal (blue) maps of linkage group 4. Regions and markers outlined in orange are located within the non-recombining regions of the X and Y chromosome. Markers indicated in black are in the pseudoautosomal region. Dotted lines indicate contigs 30 and 43 are each probably misassembled from separate linkage groups (see Supplemental Table 2). Asterisks indicate contigs in the non-recombining region that were only placed in one linkage map