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

Table 1 Multivariate statistical analyses of the explanatory variables for the caterpillar-expression dataset

Model description	PC	Samples	R²	Q²	P value*
Tissue	4	71	0.985	0.982	0
Plant use	6	71	0.93	0.804	2.7e-13
Plant phylogeny	2	71	0.341	0.196	5.4e-5
Plant use within gut	4	18	0.991	0.875	0.01
Plant use within Malpighian tubules	3	17	0.977	0.83	0.01
Plant use within fat body	4	18	0.992	0.929	0.005

The analyses tested the goodness of fit (R²) and predictive ability (Q²) of tissue, plant use and plant phylogeny as explanatory variables. The significance of the PLS model was tested using a cross-validated ANOVA and the p-value metric is presented in the table (*). The number of samples is also provided for each corresponding model and the number of predictive components (PC)

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