Fig. 1
From: Provenance variation and seed sourcing for sessile oak (Quercus petraea (Matt.) Liebl.) in France
Linear regression between provenance mean annual girth increment between age 10 and 20 (aCIRC10-20, index, see Additional file 1: Table S2) at the site of Sillegny (whole sample of provenances) and mean annual temperature (MAT, in °C) at the origin of provenance. Legend: Vertical dashed line indicates MAT value at the site of Sillegny, black dots correspond to the French provenances. The blue line is the regression line (aCIRC10-20 = 1.84 + 0.03 MAT; p < 0.0004)