The Molecular Genetic Basis of Herbivory between Butterflies and their Host-Plants

Sumitha Nallu, Jason Hill, Kristine Don, Carlos Sahagun, Wei Zhang, Camille Meslin, Emilie Snell-Rood, Nathan L. Clark, Nathan I. Morehouse, Joy Bergelson, Christopher W. Wheat, Marcus R. Kronforst

Research output: Contribution to journalArticlepeer-review

Abstract

Interactions between herbivorous insects and their host-plants are a central component of terrestrial food webs and a critical topic in agriculture, where a substantial fraction of potential crop yield is lost annually to pests. Important insights into plant-insect interactions have come from research on specific plant defenses and insect detoxification mechanisms. Yet, much remains unknown about the molecular mechanisms that mediate plant-insect interactions. Here we use multiple genome-wide approaches to map the molecular basis of herbivory from both plant and insect perspectives, focusing on butterflies and their larval host-plants. Parallel genome-wide association studies in the Cabbage White butterfly, Pieris rapae, and its host-plant, Arabidopsis thaliana, pinpointed a small number of butterfly and plant genes that influenced herbivory. These genes, along with much of the genome, were regulated in a dynamic way over the time course of the feeding interaction. Comparative analyses, including diverse butterfly/plant systems, showed a variety of genome-wide responses to herbivory, yet a core set of highly conserved genes in butterflies as well as their host-plants. These results greatly expand our understanding of the genomic causes and evolutionary consequences of ecological interactions across two of Nature's most diverse taxa, butterflies and flowering plants.

Original languageEnglish (US)
JournalUnknown Journal
DOIs
StatePublished - Jun 23 2017

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