Fig. 5
From: Wing spot in a tropical and a temperate drosophilid: C = C enrichment and conserved thermal response
The line graph illustrates the variation in wing pigmentation across three growth temperatures for two species: (A) D. biarmipes (B) D. suzukii. Each line in the graph represents one isofemale line within a population. The graph indicates a clear trend, as the temperature increases from 18°C to 28°C, there is a decrease in the wing pigmentation values for both the species. The trend is consistent across multiple isofemale lines suggesting that the response to temperature is a general characteristic within each species. These trends across temperatures from a natural population strongly indicate a genotype by environment (G x E) interaction for wing pigmentation