Fig. 2.

Mean number of Hs and Hv males attracted in the field experiments to the parental species females (fem) (A and B) and to the backcross females (C and D). Hs males were captured more in traps baited with Hs females (A) or with backcross females with the norm-OAc QTL (C), whereas Hv males were attracted more to traps baited with Hv females (B) or with backcross females with the low-OAc QTL (D). The upper numbers in the bar graphs represent the number of males attracted. The lower numbers represent the number of females tested. Error bars represent SEM.