Evolutionary history of host use, rather than plant phylogeny, determines gene expression in a generalist butterfly

BMC Evolutionary Biology

Research Article

Ramprasad Neethiraj¹  Sören Nylin¹  Christopher W. Wheat¹  Maria de la Paz Celorio-Mancera¹  Niklas Janz¹  Mikael Huss²  Francesco Vezzi²  Johan Reimegård² 

[1] Department of Zoology Ecology, Stockholm University, Svante Arrheniusväg 18 B, 106 91, Stockholm, Sweden;Science for Life Laboratory, Stockholm, Sweden;

关键词: Coevolution;    Speciation;    Gene expression;    Host shift;    Vanessa cardui;    Pest species;   

DOI  :  10.1186/s12862-016-0627-y

 received in 2015-10-23, accepted in 2016-02-26,  发布年份 2016

来源: Springer

【 摘 要 】

BackgroundAlthough most insect species are specialized on one or few groups of plants, there are phytophagous insects that seem to use virtually any kind of plant as food. Understanding the nature of this ability to feed on a wide repertoire of plants is crucial for the control of pest species and for the elucidation of the macroevolutionary mechanisms of speciation and diversification of insect herbivores. Here we studied Vanessa cardui, the species with the widest diet breadth among butterflies and a potential insect pest, by comparing tissue-specific transcriptomes from caterpillars that were reared on different host plants. We tested whether the similarities of gene-expression response reflect the evolutionary history of adaptation to these plants in the Vanessa and related genera, against the null hypothesis of transcriptional profiles reflecting plant phylogenetic relatedness.ResultUsing both unsupervised and supervised methods of data analysis, we found that the tissue-specific patterns of caterpillar gene expression are better explained by the evolutionary history of adaptation of the insects to the plants than by plant phylogeny.ConclusionOur findings suggest that V. cardui may use two sets of expressed genes to achieve polyphagy, one associated with the ancestral capability to consume Rosids and Asterids, and another allowing the caterpillar to incorporate a wide range of novel host-plants.

【 授权许可】

CC BY   
© Celorio-Mancera et al. 2016