Fig. 4 in Multivariate analysis of chemical and genetic diversity of wild Humulus lupulus L. (hop) collected in situ in northern France

Fig. 4. Results of characterization of soil samples collected close to the root environment of the 63 hops studied. These 63 hops samples are represented by ten commercial varieties: Nugget comes from « comm_1 »; Strisselspalt comes from « comm_2 » and other commercial cultivars come from the same field « comm_3–10 »; three heirloom varieties coming from the same field identified as « old »; and fifty wild hops identified according to Table 1. The characterization of soil samples was based on pH and conductivity measurements, on organic matter content determined by loss of ignition as well as on dosage of the sodium, potassium, calcium and magnesium elements. A. Dendrogram including hierarchical cluster analysis (N = 8) among soil samples determined by soil characterization. B. Heatmap associated to the dendrogram. The 8 clusters of the hierarchical clustering were reported on the heatmap. C. Pictures of soil samples from locations B (Tourbi`ere de Vred, Vred) (1), D (Cap Blanc nez, Wissant) (2) and K (Dunes d'Ecault) (3).