Figure 2.

Weighted gene co-expression network analysis (WGCNA) of the fungal component of the Ulmus americana-Ophiostoma novo-ulmi ssp. Americana interactome. (A) Cluster dendrogram showing the genes (branches) and co-expressed modules (colors); genes were clustered in 29 modules according to 1-TOM soft threshold. (B) Number of eigengenes per module. (C) Module traits in O. novo-ulmi in planta. The colour scale (red-blue) for relationships between module eigengenes (rows) and treatments (columns) represents the strength of the correlation (1 to −1). Modules Darkred (p < 0.01), Green (p < 0.01) and Purple (p < 0.05) were associated with higher gene expression in susceptible (S) compared to resistant (VF) elm.