科罗拉多州马甲虫的化学传感基因的演变,Leptinotarsa decemlineata
Zachary Cohen1, Michael S Crossley1, Robert F Mitchell2
1Department of Entomology, University of Wisconsin-Madison, Madison, WI, United States.
Journal of evolutionary biology
|January 29, 2024
概括
昆虫食草动物通过与植物宿主结合而多样化. 科罗拉多马虫 (CPB) 化学感知基因进化显示,一般性物种的阳性选择率更高,有助于宿主植物扩张.
科学领域:
- 进化生物学 进化生物学
- 基因组学就是基因组学.
- 昆虫生态学 昆虫生态学
背景情况:
- 昆虫食草动物占全球物种多样性的大部分,宿主植物协会推动了多样化.
- 了解使宿主植物转移的遗传变化对于害虫及其宿主植物范围至关重要.
- 昆虫化学受体对于植物的检测和养至关重要,但它们在宿主转移期间的演变仍然不清楚.
研究的目的:
- 研究科罗拉多马虫 (CPB) 中的化学传感基因选择和宿主植物扩张之间的联系.
- 分析CPB的选择模式,并将其与表现出不同饮食范围的相关Leptinotarsa物种进行比较.
- 确定影响宿主植物广度和害虫控制潜在目标的遗传因素.
主要方法:
- 开发了CPB天线和大 - 皮手掌的新型基因表达数据,以表征化学传感基因.
- 在CPB中检查了化学感官位置的选择模式.
- 对比了9个相关的Leptinotarsa物种的选择率,它们具有不同的宿主植物专业化.
主要成果:
- 在宿主植物通用学家中,对嗅觉受体的积极选择率较高.
- 这种积极选择的信号在科罗拉多马甲虫 (CPB) 中特别明显.
- 这些发现表明,化学传感基因进化和宿主植物宽度之间存在着强烈的联系.
结论:
- 在Leptinotarsa物种中,嗅觉受体的选择与宿主植物的泛化有关.
- CPB在化学感知基因上表现出强烈的积极选择信号,与其广泛的宿主范围相关.
- 这些结果为昆虫的化学传感性能和潜在的害虫管理策略的遗传基础提供了宝贵的见解.
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