在13种Tefritidae物种中进行的转录基因分析提供了对气味受体进化背后的生态驱动力的洞察
Emma Persyn1, Pierre-François Duyck2, Marie-Christine François3
1CIRAD, Université de la Réunion, UMR PVBMT, 7, ch. de l'IRAT, F-97410 Saint-Pierre, La Réunion, France; INRAE, Sorbonne Université, CNRS, IRD, UPEC, Université Paris Cité, Institute of Ecology & Environmental Sciences of Paris, Route de Saint-Cyr, F-78026 Versailles Cedex, France.
Molecular phylogenetics and evolution
|March 6, 2025
概括
果气味受体 (OR) 进化在13种物种中进行了研究. OR 剧目和表达模式与果宿主范围相关,为嗅觉系统演变的生态驱动因素提供了洞察力.
科学领域:
- 昆虫嗅觉系统的演变
- 宿主植物相互作用的分子基础
- 比较基因组学和转录基因组学.
背景情况:
- 昆虫嗅觉受体 (ORs) 检测挥发性线索,指导诸如宿主选择之类的行为.
- 虫家族 (果) 表现出多样化的宿主偏好,使他们成为研究OR进化的理想模型.
- 了解生态压力如何塑造OR剧目对于昆虫行为和害虫管理至关重要.
研究的目的:
- 为了识别和描述13种不同宿主范围的Tefritidae物种的气味受体 (OR) 谱.
- 研究OR谱系特征与物种宿主专业化之间的关系.
- 揭示分子洞察力,了解驱动果OR进化的生态因素.
主要方法:
- 用RNA测序 (RNAseq) 来识别13种Tefritidae的OR转录物.
- 进行手动化以注释OR序列,包括核心受体Orco.
- 在三种物种中进行了天线和巴之间以及两性之间的差异基因表达分析.
主要成果:
- 包括Orco在内的60-80个OR转录被注释为每个物种,报告了698个新的OR序列.
- 某些OR的器官和性别偏差表达在天线和上手掌中观察到.
- 遗传学分析揭示了OR谱系特征 (序列保存,表达水平) 和宿主范围之间的相关性,多动物物种显示了保存的OR.
结论:
- 生态因素,特别是宿主范围,显著影响了Tephritidae中的气味受体谱的演变.
- 在多果中保存的OR序列和表达模式表明它们适应了更广泛的嗅觉景观.
- 这项研究为了解昆虫嗅觉在应对生态的适应性演变提供了分子基础.
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