Electronic Summary Material

Table 1 Location of the populations used in greenhouse experiment

Sampling site / Longitude / Latitude
European populations
P1 / Hornstein, Austria / 16.454° E / 47.879° N
P2 / Deatchlevenz, Austria / 16.630° E / 47.820° N
P3 / Weiner-Newstadler, Austria / 16.242° E / 47.815° N
P4 / Fenestrelle, France / 2.684° E / 44.258° N
P5 / Pontamafrey, France / 6.324° E / 45.298° N
P6 / Rembs, France / 7.491° E / 47.694° N
P7 / Germany / 13.148° E / 52.606° N
P8 / Badraer, Germany / 11.023° E / 51.392° N
P9 / Hamboldt U., Germany / 9.059° E / 48.528° N
P10 / Gyor, Hungary / 17.639° E / 47.678° N
P11 / Romania 1 / 27.465° E / 47.192° N
P12 / Romania 2 / 26.512° E / 47.242° N
P13 / Romania 3 / 27.560° E / 47.202° N
P14 / Romania 4 / 26.248° E / 47.431° N
P15 / Ukraine 3 / 24.664° E / 49.400° N
P16 / Ukraine 4 / 26.467° E / 48.516° N
P17 / Ukraine 5 / 27.291° E / 49.772° N
P18 / Ukraine 6 / 27.213° E / 47.828° N
North American populations
P1 / Arkansas / 94.098° W / 36.331° N
P2 / Elko, British Columbia / 115.121° W / 49.292° N
P3 / Idaho / 116.006° W / 46.209° N
P4 / Augusta, Michigan / 85.489° W / 42.417° N
P5 / St. Paul, Minnesota / 93.093° W / 44.944° W
P6 / Reno, Nevada / 119.878° W / 39.511° N
P7 / Virginia / 78.989° W / 38.081° N
P8 / Spokane, Washington / 117.552° W / 47.627° N
P9 / BigArm, Montana / 114.333° W / 47.835° N
P10 / Bozeman, Montana / 111.074° W / 45.667° N
P11 / Eureka, Montana / 115.055° W / 46.938° N
P12 / St. Mary’s Lake, Montana / 113.466° W / 48.732° N
P13 / Dupuyer, Montana / 112.657° W / 48.123° N