Raspberry ketone (RK) supplements provided together with sugar and yeast hydrolysate accelerate sexual maturation and increase mating success of Queensland fruit fly (‘Qfly’) males. However, the mechanisms underlying this enhanced mating ability are currently unknown. Volatiles are an important element of Qfly sexual calling and courtship and so changes in volatiles quantity or quality may be involved, and the present study investigated this possibility. Flies were fed a diet of sugar only (S) or yeast hydrolysate mixed with sugar (YH + S) (1:3) that contained 0% RK (control) and 5% RK (treated) for 2 days after emergence. Volatile compounds were extracted from rectal glands when flies were 6, 8, 10, 20, and 30 days old. Males fed on RK exhibited a significant increase in total volatile production in rectal glands compared to RK-unfed males (control). Males fed on RK with YH + S produced significantly higher amount of volatiles than males fed on RK with sugar only. Males fed on YH + S diet produced more volatiles in the presence of RK compared to males fed on YH + S diet only. Two compounds, N-(3-methylbutyl)acetamide and N-(3-methylbutyl)propanamide were dominant in endogenously produced rectal gland volatiles comprising ca. more than 90% of the total amount in both RK-fed and control males. Considering exogenous and endogenous compounds together, unaltered RK was dominant along with these two endogenous compounds in RK-fed males in rectal gland until 30 days of age in both diet groups.

与糖和酵母水解物一起提供的树莓酮（RK）补充剂可加速性成熟并提高昆士兰果蝇（Qfly）雄性的交配成功率。然而，目前尚不知道这种增强的交配能力的机制。挥发物是Qfly性交和求爱的重要因素，因此可能涉及挥发物数量或质量的变化，本研究调查了这种可能性。苍蝇在出苗后2天只接受含糖饮食（S）或酵母水解物与含糖（YH + S）（1：3）混合的饮食（含0％RK（对照）和5％RK（处理））。当蝇龄为6、8、10、20和30天时，从直肠腺中提取挥发性化合物。与未饲喂RK的雄性相比，饲喂RK的雄性在直肠腺体中的总挥发物产量显着增加（对照）。用RK饲喂YH + S的雄性产生的挥发物比仅用糖饲喂RK的雄性产生更多。与仅饲喂YH + S的雄性相比，饲喂YH + S的雄性在有RK的情况下产生更多的挥发物。两种化合物N-（3-甲基丁基）乙酰胺和N-（3-甲基丁基）丙酰胺在内源性直肠腺体挥发物中占主导地位。RK喂养的男性和对照男性的总数量超过90％。综合考虑外源性和内源性化合物，在两个饮食组中，直到30天龄，直肠内由RK喂养的雄性中未改变的RK与这两种内源性化合物一起占主导地位。