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Reaction norms for bud set (day of year, DOY) (a,b), bud break (cumulative growing degree days, cGDD) (c) and height growth (
cm) (d,e). Reaction norms for bud set across three common gardens represented by their region of origin (core, margin, edge) assignments based on results of genetic clustering analyses [36]. Colour is coded based on the region ancestry, with yellow, green and blue for core, margin and edge, respectively.
