Selection on olfactory response to semiochemicals from a plant–host complex in a parasitic wasp
Selection on olfactory response to semiochemicals from a plant–host complex in a parasitic wasp
复制标题
寄生蜂植物-宿主复合物对化学信息素的嗅觉反应的选择
作者：
Q. Wang;H. Gu;S. Dorn
寄生蜂（拟寄生蜂）利用被植食性昆虫侵染的植物的挥发物来定位寄主食草动物，但它们对这些半化学物质的行为反应是高度可变的。通过对小蜂科（Cotesia glomerata，膜翅目：小蜂科）的双向选择，探讨遗传变异在寄生蜂嗅觉反应中的重要性。雌性黄蜂在风洞中对植物-寄主复合物的己烷提取物的反应进行了飞行方向和着陆成功的评估。在第一代选择之后，两个品系在飞行方向和着陆成功上都有显著的差异，并且在进一步的选择中继续分化。所选的两种菌株在嗅觉感知而不是逆风飞行能力方面存在遗传差异。实现的遗传率估计为飞行方向为0.248，着陆成功为0.216。选择实验进一步证明，与遗传差异无关，事先暴露于这些化学物质显著增强了雌性胡蜂的后续反应。这些结果表明，遗传因素和环境条件在寄生蜂选择和利用宿主的进化过程中发挥了重要作用。
Parasitic wasps (parasitoids) use volatiles from the plants infested by phytophagous insects to locate host herbivores, but their behavioural response to such semiochemicals is highly variable. Bi-directional selection on Cotesia glomerata (Hymenoptera: Braconidae) was conducted to investigate the importance of genetic variation in the olfactory response of parasitoids. Female wasps were assessed for flight orientation and landing success in response to the hexane extract from a plant–host complex in a wind tunnel. After the first generation of selection, two strains significantly differentiated in both flight orientation and landing success, and their divergence continued with further selection. The two selected strains genetically differentiated in olfactory perception rather than upwind flight ability. The realized heritability was estimated as 0.248 for flight orientation and 0.216 for landing success. The selection experiment further demonstrated that a prior exposure to the semiochemicals significantly enhanced the subsequent response of female wasps, independent of genetic differences. These results suggest that both genetic component and environmental conditioning have played an important role in the evolution of host selection and utilization by the parasitoid in a tritrophic system.
选择用于风洞飞行的大量黑腹果蝇以较小的健身成本实现大的遗传变化：重新思考健身表面。
影响因子：
3.3
作者：
Weber,KE
通讯作者：
Weber,KE