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适应性和形态学支持基因差异化跨不同的地理尺度在一个本地昆虫使用本地与侵入性宿主植物

Johannes J Le Roux¹, Levi Brown¹, Scott P Carroll²

¹School of Natural Sciences Macquarie University Sydney New South Wales Australia.

Ecology and evolution

|May 14, 2025

概括

澳大利亚肥果虫迅速适应入侵植物,显示北领地和东部种群之间的遗传差异. 这种快速的进化凸显了本地物种如何对新资源做出反应.

科学领域:

生态生态学生态生态学
进化生物学进化生物学
遗传学是一个遗传学.

背景情况:

当利用入侵物种作为新的食物来源时,本地物种可以迅速进化.
澳大利亚肥果虫 (Leptocoris tagalicus) 为研究快速适应提供了一个模型.
研究不同宿主植物和地理位置之间的差异化是理解进化反应的关键.

研究的目的:

为了研究Leptocoris tagalicus种群的遗传和特征分化.
为了评估适应对侵袭性植物和本地宿主植物的食的反应.
为了确定L. tagalicus. 的特征和杂交表现的遗传性.

主要方法:

基因分析 (FST) 用于量化种群差异化.
实地观测和多代实验以追踪特征适应.
杂交实验以评估特征遗传性和杂交活力.

主要成果:

在北领地 (NT) 和新南威尔士 (NSW) /昆士兰 (Qld) 种群之间发现了适度的遗传差异 (FST = 0.033).
在新南威尔士州和Qld群体之间观察到低基因差异 (FST = 0.008),无论宿主植物如何.
在侵入性宿主上的昆虫中,鼻长度的持续适应是显而易见的,鼻长度 (H2 = 0.48) 和身体大小 (H2 = 0.4) 的高度遗传性.

结论:

莱普托科里斯·塔加利克斯生物型显示在不同的空间尺度上正在进行的遗传差异化.
快速适应,特别是在鼻长度,正在发生,以应对新型入侵宿主植物.
高遗传性和F1杂交的优异性能表明强大的选择性压力和进一步进化分歧的潜力.

关键词:

混合化,混合化,混合化.侵入性物种是一种入侵性物种.植物与昆虫的相互作用快速进化的快速演变

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