FIGURE 6

Autocorrelation as an indicator of profile regionalization. (A) Graph showing autocorrelation values (y-axis) and their statistical support [-ln(p-value) on x-axis] for all gene models. Each dot corresponds to a single gene model, in gray if the corresponding total digital expression is below 100, otherwise in black. Gene models with null p-values are shown on the right of the graph with –ln(p-value) = infinite (Inf). Horizontal arrowheads point to dots corresponding to a selection of genes, exhibiting clearly regionalized expressions in ISH experiments. Color codes for these genes are shown boxed in black. Colored boxes delimit sectors of the graph numbered from 1 to 5 and containing gene models with decreasing p-values/increasing autocorrelations (green, sector 1; yellow, sector 2, cyan, sector 3; blue, sector 4; magenta, sector 5). (B–F) Digital transverse sections showing examples of profiles observed in sectors 1 (B), 2 (C), 3 (D), 4 (E), and 5 (F). The corresponding gene identities are indicated and sections are numbered from posterior to anterior.