Fig. 6

Hub metabolites related to germination temperature and stage of pecan seeds identified by WGCNA. (a) Clustering dendrogram of average network adjacency for the identification of metabolite co-expression modules. Clustering dendrogram of metabolites with dissimilarity based on topological overlap and assigned module colors; (b) Heatmap eigengenes connectivity. (c) Correlation between the WGCNA module, germination temperature, and growth stage of pecan seeds. The rows correspond to the modules, and the columns correspond to the features. The darker the red or blue color in the cell, the higher the positive or negative correlation, respectively. The number in each cell represents the corresponding correlation and P-value. (d-f) Network diagram of hub metabolites in three modules with high correlation: (d) turquoise module; (e) brown module; (f) blue module