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基因组可塑性驱动害虫的嗅觉适应

Qi Xue¹, Hany K M Dweck¹

¹Department of Entomology, The Connecticut Agricultural Experiment Station, New Haven, CT 06511, USA.

bioRxiv : the preprint server for biology

|September 26, 2025

概括

果嗅觉系统的适应导致偏好转变. 化学感知基因中的基因可塑性允许在害虫物种Drosophila suzukii中快速感知适应和利基过渡.

科学领域:

* 昆虫的嗅觉和感官生态学.
* 进化生物学和基因组学.

背景情况:

* 嗅觉系统的变化导致昆虫偏好转变,但机制尚不清楚.
害虫果Drosophila suzukii在成熟的水果中产卵,为研究这些变化提供了一个模型.
*了解这些机制对于害虫控制策略至关重要.

研究的目的:

* 调查Drosophila suzukii*中嗅觉偏好转变背后的机制.
* 确定参与这种行为适应的特定嗅觉受体神经元.
* 探索这些感官变化的基因组基础.

主要方法:

*对D. suzukii*和D. biarmipes*之间嗅觉受体神经元功能进行比较分析.
* 嗅觉受体基因表达和序列分歧的研究.
* 嗅觉受体神经元ab2B,ab3A,ab4B和ab10A的功能性表征.

主要成果:

*四个嗅觉受体神经元 (ab2B,ab3A,ab4B,ab10A) 的功能重塑是D. suzukii*偏好转变的基础.
*在ab2B和ab4B神经元中观察到特定物种的适应性.
*确定了新的机制,包括受体共表达和对应物分区表达.

结论:

* 化学传感基因家族中的基因可塑性使得快速的感官适应.
* 这些适应促进了的转变,如D. suzukii在成熟的水果中转向产卵.
*这项研究提供了对嗅觉驱动行为进化的分子基础的见解.

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