SI Text S1
Structure analysis and AMOVA on SNP data for Gonioctena quinquepunctata.
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Calculations of conversion of cyanogenic glycoside contents for dry and fresh weight leaves.
Full data on identities and numbers of herbivores collected on each individual Prunus serotina and Prunus padus in National Park Zuid-Kennemerland.
Information on insect herbivore damage in historical collection specimens from the National Herbarium, Leiden, for Prunus serotina and Prunus padus.
Full data on NMR analysis of Prunus leaves.
SNP genotype data on Gonioctena quinquepunctata.
Oligonucleotides used for the SNP-analysis of Gonioctena quinquepunctata.
SNP Loci that showed indications of genetic differentiation between both host plants in the leaf beetle Gonioctena quinquepunctata.
ANOVA and GLM results for the Gonioctena quinquepunctata host preference tests.