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Fig. 2 | BMC Evolutionary Biology

Fig. 2

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

Fig. 2

Statistical data analyses of the tissue-specific transcriptomes from caterpillars reared on six host-plant species. Hierarchical clustering with bootstrapping a. Each branch in the dendogram represents the expression profile of a transcriptome. Each transcriptome is a biological replicate represented in turn by the read-count data generated from 9 million reads summed by ortholog (12 591 orthologs). Transcriptomes in a given cluster have similar expression profiles. Thick-black branches indicate p-value and bootstrap probabilities > 90 for a given cluster. The vertical bars next to the dendogram indicate the categories under plant use or plant phylogeny for each transcriptome. Plant use: core repertoire in black and extended repertoire in white. Plant phylogeny: Rosids in grey linear gradient, Asterids in solid dark grey and Ranunculales in solid light grey. Each transcriptome perfectly clusters by tissue and within tissue clusters more strongly according to plant use than plant phylogeny. ANOVA testing the effect of tissue, plant use and plant phylogeny and interactions of the factors b. All factors and their interactions were significant (P < 2.2 e−12). F-scores obtained from ANOVA analysis for factors are graphed. The variable tissue was the most significant explaining the variability in the gene-expression data, followed by plant use and last plant phylogeny

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