羊甲虫Trypodendron lineatum中的少数化学受体基因可能反映了其专门的生态
Twinkle Biswas1, Heiko Vogel2, Peter H W Biedermann3
1Department of Biology, Lund University, Sölvegatan 37, 223 62, Lund, Sweden.
BMC genomics
|August 6, 2024
概括
像Trypodendron lineatum这样的专业虫甲虫的化学受体较少,这表明饮食和感官基因进化之间存在联系. 这项研究显示,这种物种的气味受体 (ORs),味觉受体 (GRs) 和离子受体 (IRs) 减少.
科学领域:
- 昆虫基因组学 昆虫基因组学
- 化学感知受体的演变
- 行为生态学 行为生态学
背景情况:
- 化学接收对于昆虫的生存至关重要,指导食物,宿主和伴侣的位置.
- 三个基因家族:香味受体 (ORs),味觉受体 (GRs) 和离子受体 (IRs) 直接化学检测.
- 化学受体基因家族与生态专业化相关的进化途径,特别是在Coleoptera中,尚不清楚.
研究的目的:
- 为了研究羊甲虫Trypodendron lineatum的化学受体基因库.
- 为了比较T. lineatum的化学受体与其他 scolytines的化学受体和一个多的cerambycid物种.
- 了解生态专业化如何影响甲虫中化学传感基因家族的进化.
主要方法:
- 基因组测序和Trypodendron lineatum的化学受体基因注释.
- 在不同甲虫物种中对化学受体基因库的比较分析.
- 遗传学分析以识别正体受体基因.
主要成果:
- 与相关物种相比,T. lineatum具有较少的化学受体 (67 OR,38 GR,44 IR),这归因于较少的血统辐射和缺乏替代拼接.
- 观察到苦味GRs和"分歧"IRs的减少,糖受体的丧失,以及没有保存的GR215分类对应物.
- 两种T. lineatum的ORs (TlinORs) 与已知的2-phenylethanol (2-PE) 和绿叶挥发物 (GLVs) 的curculionid受体相对应.
结论:
- 木甲虫的狭性与化学受体数量的减少有关,这可能是由于T. lineatum. 的限制性真菌饮食.
- 鉴定到的TlinOR表明2-PE和GLV对T. lineatum生态的重要性.
- 需要对虫化学受体进行进一步的研究,以确定减少的受体数量是否是这个群体的共同特征.
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