Fig. 2
From: Root system traits impact early fire blight susceptibility in apple (Malus × domestica)
Genotype clustering based on principal component analysis (PCA) and hierarchical clustering of root and disease traits. (a) Six genotype clusters obtained from a population of 45 scion genotypes grafted onto ‘M7’ rootstocks. Distribution of means and variances in each cluster for (b) root dry mass (g) for C1–2.3, C2–2.2, C3–3.0, C4–3.8, C5–3.7, and C6–1.5; (c) percent lesion length (%) for C1–45.9, C2–22.6, C3–22.4, C4–9.4, C5–40.5, and C6–76.7