Multiple host shifts between distantly related plants, Juglandaceae and Ericaceae, in the leaf-mining moth Acrocercops leucophaea complex (Lepidoptera: Gracillariidae).
Multiple host shifts between distantly related plants, Juglandaceae and Ericaceae, in the leaf-mining moth Acrocercops leucophaea complex (Lepidoptera: Gracillariidae).
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DOI：
10.1016/j.ympev.2005.06.010
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发表时间：
2006
影响因子：
4.1
通讯作者：
I. Ohshima;K. Yoshizawa
中科院分区：
文献类型：
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作者：
I. Ohshima;K. Yoshizawa
食草昆虫，如食虫虫和潜叶虫，通常高度专门化，并适应它们各自出生的寄主植物。由于植物的专化性和适应性，推测寄主很容易在近缘植物之间发生转移。采叶蛾是白背飞蛾复合体，由三个种组成，即白背飞蛾、白背飞蛾和横纹夜蛾。该复合体所有种的幼虫都取食核桃科植物，但白果核桃和横叶核桃也与杜鹃花科植物有关，后者与核桃科植物有较远的亲缘关系。在植食性昆虫中，像这种物种复合体这样的寄主利用是非常罕见的。在本研究中，我们通过使用分子数据(线粒体COI、12S rDNA和ND5的部分序列)重建白纹伊蚊复合体的系统发育来估计宿主转移的历史。简约性和极大似然性分析表明，白毛委陵菜复合体的共同祖先只使用了胡桃科植物，而与杜鹃花科植物的亲缘关系在白毛委陵兰科和横断委陵菜中独立进化。参数Bootstrap分析也支持在这个复合体中与杜鹃花科联系的多个来源。这些结果表明，尽管胡桃科和杜鹃花科之间没有密切的亲缘关系，但存在促进这两个科之间寄主转移的生态和生化因素。
Insect herbivores such as gall formers and leaf miners are often highly specialized and adapted to their respective natal host plants. Due to the specialization and adaptation, it is presumed that host shifts readily occur among closely related plant species. Leaf-mining moths, the Acrocercops leucophaea complex, consist of three species, A. leucophaea, A. defigurata, and A. transecta. Larvae of all the species of the complex feed on Juglandaceae plants, but A. leucophaea and A. transecta are also associated with an Ericaceae plant, which is quite distantly related to Juglandaceae. Such a host utilization as in this species complex is very rare among phytophagous insects. In the present study, we estimate the history of host shifts by reconstructing the phylogeny of the A. leucophaea complex using molecular data (partial sequence of mitochondrial COI, 12S rDNA, and ND5). Parsimony and maximum likelihood analyses indicated that the common ancestor of the A. leucophaea complex used Juglandaceae only, and that the association with Ericaceae has evolved in A. leucophaea and A. transecta independently. Parametric bootstrap analysis also supported multiple origins of the association with Ericaceae in this complex. These results imply that there are ecological and biochemical factors that promote host shifting between Juglandaceae and Ericaceae despite the two families being not closely related.