The making of a pest: insights from the evolution of chemosensory receptor families in a pestiferous and invasive fly, Drosophila suzukii

Background: Drosophila suzukii differs from other melanogaster group members in their proclivity for laying eggs in fresh fruit rather than in fermenting fruits. Olfaction and gustation play a critical role during insect niche formation, and these senses are largely mediated by two important receptor families: olfactory and gustatory receptors (Ors and Grs). Earlier work from our laboratory has revealed how the olfactory landscape of D. suzukii is dominated by volatiles derived from its unique niche. Signaling and reception evolve in synchrony, since the interaction of ligands and receptors together mediate the chemosensory behavior. Here, we manually annotated the Ors and Grs in D. suzukii and two close relatives, D. biarmipes and D. takahashii, and compared these repertoires to those in other melanogaster group drosophilids to identify candidate chemoreceptors associated with D. suzukii’s unusual niche utilization. Results: Our comprehensive annotations of the chemosensory genomes in ...背景：斑翅果蝇（Drosophila suzukii）与黑腹果蝇组（melanogaster group）的其他类群存在显著差异，其偏好将卵产于新鲜果实而非发酵果实中。嗅觉与味觉在昆虫生态位形成过程中发挥关键作用，而这两类感官主要由两类重要的受体家族介导：嗅觉受体（olfactory receptors, Ors）与味觉受体（gustatory receptors, Grs）。本实验室此前的研究已揭示，斑翅果蝇的嗅觉图谱主要由其独特生态位产生的挥发物所主导。信号转导与感知协同进化，因为配体与受体的相互作用共同介导化学感应行为。本研究中，我们对斑翅果蝇及其两个近缘物种——双带果蝇（D. biarmipes）和高砂果蝇（D. takahashii）——的Ors与Grs进行了手动注释，并将这些受体组与其他黑腹果蝇组果蝇的受体组进行比对，以鉴定与斑翅果蝇非常规生态位利用相关的候选化学感受器。结果：我们对...的化学感应基因组进行了全面注释...