Figure 1.

Trees original locations. Black squares are Norway spruce progeny test belonging to the Swedish breeding program. ‘Plus’ and ‘multiply’ signs are tree sampling locations, and the latter indicating a wrong assignation in available records. Discs are the centroid of the geographical coordinates of trees belonging to a same genetic cluster and having a known origin. The grey arrow (right panel) indicates the location of the trial ‘Ekebo’, where bud‐burst was characterized. Colours correspond to genetic clusters (Carpathian, dark blue, ROM; Alpine, light blue, ALP; Central Europe, green, CEU; Northern Poland, yellow, NPL; Russia‐Baltic, orange, Rus‐Bal; central and southern Sweden, red, CSE; Fennoscandian, pink, NFE)