Fig. 1.

Association of D. yakuba with noni (Morinda citrifolia) on Mayotte and assortative mating with mainland flies. (A) Geographical distribution of D. yakuba (orange) (www.taxodros.uzh.ch/) and noni (light green) (28). Colors indicate location of strains used in subsequent experiments: D. sechellia (green), Mayotte D. yakuba (blue), and Cameroon D. yakuba (red). (B) Map of the island of Mayotte showing the location where D. yakuba was collected on noni (solid circle) and other prospected areas where D. yakuba was not found (open circles). (C) Proportion of homo- and heterogamic copulations between Mayotte and Cameroon D. yakuba. Fisher’s exact test P values are given by comparing outcomes of each cross to parity. Error bars indicate 95% confidence interval.