Experimental Evolution of Gene Expression and Plasticity in Alternative Selective Regimes
Fig 1
Selection history of the experimental populations.
The Grand Ancestor population (GA) was established from wild collected flies and maintained in benign laboratory conditions (cornmeal diet). It was used to initiate populations maintained on cadmium-enriched diet (Ancestral Cadmium [AC]) or salt-enriched diet (Ancestral Salt [AS]). The treatment populations were produced by crossing two ancestral population AC and AS, and the F1 offspring were randomly divided among four selective regimes (Cad, Salt, Temp, and Spatial). There are five replicate populations of each of the four regimes (not illustrated).