Figure 1.

Dictyostelium discoideum chromosome 6. The HAPPY map is uppermost. First-rate markers mapped in this study have names prefixed with DH. The names of genes (bold) and YACs from which some of the markers originate are indicated above their DH names. Second-rate markers (prefixed 2DH) are placed, only tentatively, between the two first-rate markers to which they show strongest linkage. Chromosomal length is marked in kilobases, based on an assumed map length of 4 Mb. Open triangles indicate the gaps between short-range linkage groups that were closed using the long-range panel. The filled triangle indicates a gap closed at a reduced long-range lod threshold. YACs are indicated below as horizontal lines in the positions given by the physical map (Kuspa and Loomis 1996). The number of subclone-derived markers from each YAC, for which we obtained mapping data, is indicated in brackets after the YAC name. Thick horizontal lines indicate YACs from which subclone-derived markers were mapped to chromosome 6 (lines connected to the HAPPY map indicate the locations of these mapped markers); thin horizontal lines indicate YACs whose markers do not map to chromosome 6. YAC 3234 is apparently chimeric.