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嗅觉和味觉受体基因和可移植元素的全面注释揭示了它们在虫中的进化动态

Sergio Gabriel Olvera-Vazquez¹, Xilong Chen^1,2, Aurélie Mesnil^1,2

¹Université Paris Saclay, INRAE, CNRS, AgroParisTech, GQE-Le Moulon, Gif-sur- Yvette 91190, France.

Molecular biology and evolution

|September 23, 2025

概括

基因重复和可移植元素 (TE) 驱动昆虫害虫的适应. TEs影响了嗅觉 (OR) 和味觉受体 (GR) 基因进化,有助于虫宿主范围的扩大.

科学领域:

基因组学就是基因组学.
进化生物学进化生物学
昆虫分子生物学昆虫分子生物学

背景情况:

基因重复和可转移元素 (TE) 是基因组创新和适应的关键驱动力.
虽然研究了植物病原体,但它们在昆虫害虫,特别是虫中的作用不太清楚.
嗅觉受体 (OR) 和味觉受体 (GR) 对于虫的宿主识别至关重要.

研究的目的:

研究基因复制和TE在虫OR和GR基因进化中的作用.
为了将基因组特征与虫宿主范围的宽度相关联.
提供关于昆虫害虫感官受体适应性演变的见解.

主要方法:

在12个虫基因组中分析了521个OR和399个GR基因.
在OR和GR基因附近识别和分析可移植元素 (TE).
应用深度学习模型来预测功能性蛋白质区域和进化特征.

主要成果:

拥有更广泛宿主范围的虫在与宿主相互作用相关的基因家族中表现出更高的进化率.
OR和GR基因通过重复进化,并通过多样化选择形成,表明适应新宿主.
年轻的TE在OR基因附近被丰富,这表明它们在多样化中的作用,但与TE相关的OR降低了功能潜力.
与TE相关的GR保留了适应的签名,与OR不同.

结论:

TE活动可以促进GRs中的功能创新,同时可能限制虫中的ORs.
基因重复,选择和TE动力学共同塑造了昆虫害虫中的感觉基因的进化.
这项研究为适应性进化提供了机械的见解,并为Dysaphis plantaginea提供了染色体规模的组合.

关键词:

适应适应适应适应虫是一种虫.化学接收化学接收化学接收农作物农作物农作物在的功能预测.昆虫是一种昆虫.种类的变化种类的变化可转移的元素可以转移.

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