Effect of shifts of the larval biology on the radiation of Microlepidoptera (Pyralidae, Yponomeutidae) feeding on gymnosperm hosts

幼虫生物学变化对以裸子植物寄主为食的小鳞翅目（Pyralidae、Yponomeutidae）辐射的影响

• 批准号: 5363137
• 负责人: Dr. Andreas H. Segerer
• 金额: --
• 依托单位: Zoologische Staatssammlung München
• 依托单位国家: 德国
• 项目类别: Priority Programmes
• 财政年份: 2002
• 资助国家: 德国
• 起止时间: 2001-12-31 至 2004-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/5363137?language=en
• 关键词: Effect; shifts; larval; biology; radiation

Diversification and possible coevolution of two unrelated genera of gymnosperm feeding Lepidoptera (Dioryctria; Argyresthia) shall be investigated with respect to host plant shift and ecological niche strategies in order to test general evolutionary hypothesis. Gymnosperm feeding Lepidoptera exhibit a high number of sibling species groups, the relative amount of which is evidently higher than in angiosperm feeders. Hypothesis: This is the result of speciation processes accelerated by insect-host interactions. The 'escalation/ diversification' model of Ehrlich & Raven (1964) predicts that herbivore clades adapted to host plants with distinctive chemical defense systems should exhibit accelerated radiation compared to their sister groups. It has also been suggested that endophagy might limit the ability to colonize alternative hosts and restrict the potential for speciation, i.e. transition to ectophagy should promote evolutionary success. Both ideas are to be tested by reconstruction of a phylogenetic tree of the model genera using both molecular and morphological data and by subsequent analyzing host plant associations, colonization patterns and niche preferences ("telling the trees"). As a 'spin-off', it is expected that the study will provide key features for identification of economically important sibling pest species.

为了验证一般的进化假设，将从寄主植物转移和生态位策略方面研究两个不相关的裸子植物属的多样性和可能的共同进化。取食鳞翅目的裸子植物具有较高的兄弟种群，其相对数量明显高于取食被子植物的裸子植物。假设：这是昆虫与宿主相互作用加速物种形成过程的结果。埃利希和瑞文（1964）的“升级/多样化”模型预测，草食动物进化枝适应具有独特化学防御系统的宿主植物，与其姐妹群体相比，应表现出加速辐射。也有人认为，内噬可能会限制殖民替代宿主的能力，并限制物种形成的潜力，即过渡到外噬应该促进进化的成功。这两个想法是通过重建的模式属的分子和形态学数据的系统发育树，并通过随后的分析宿主植物协会，殖民模式和生态位偏好（“告诉树”）进行测试。作为一个“副产品”，预计这项研究将提供识别具有经济重要性的兄弟害虫物种的关键特征。