Fig. 3From: Association genetics of acetophenone defence against spruce budworm in mature white spruceBiplots of the three first components of principal component analysis of defence and growth traits. a, principal component 2 (PC2) versus principal component 1 (PC1); b, principal component 3 (PC3) versus PC1. Abbreviations: RW, average ring width; Ht, tree height; DBH, stem diameter at breast heightBack to article page