Table 1.
Collection Information for the Accessions Used in This Study
| Accession | ABRC No. | Locale | Collection Coordinates | Life History | Mean Annual Precipitation (mm) |
| Bur-0 | CS6643 | Burren, Ireland | 54.1°N 6.2°W | Spring | 942 |
| CIBC-17 | CS22603 | Ascot, UK | 51.41°N 0.64°W | Spring | 701 |
| Col-2 | CS907 | Gorzow, Poland (est.) | 52.73°N 12.25°E | Spring | 1007 |
| HR-5 | CS22596 | Ascot, UK | 51.41°N 0.64°W | Spring | 701 |
| Knox-18 | CS22567 | Knox, IN, US | 41.28°N 86.62°W | Spring | 975 |
| Ler-1 | CS1686 | Gorzow, Poland | 52.73°N 12.25°E | Spring | 962 |
| NFA-10 | CS22599 | Ascot, UK | 51.41°N 0.64°W | Spring | 701 |
| SQ-8 | CS22601 | Ascot, UK | 51.41°N 0.64°W | Spring | 701 |
| Ts-1 | CS6868 | Tossa del Mar, Spain | 41.72°N 2.93°E | Spring | 644 |
| Ws-2 | CS2360 | Vasil’yevka, Belarus | 52.3°N 30°E | Spring | 624 |
| Ag-0 | CS6601 | Argentat, France | 45°N 1.3°E | Winter | 887 |
| Bil-5 | CS22578 | Billaberget, Sweden | 63.32°N 18.48°E | Winter | 615 |
| Eden-1 | CS22572 | Eden, Sweden | 62.88°N 18.18°E | Winter | 655 |
| Got-22 | CS22609 | Goettingen, Germany | 51.53°N 9.94°E | Winter | 652 |
| Omo2-3 | CS22585 | Ostra Mocklo, Sweden | 56.15°N 15.77°E | Winter | 546 |
| Tamm-2 | CS22604 | Tammisaari, Finland | 60°N 23.5°E | Winter | 609 |
| Ull2-5 | CS22586 | Ullstorp, Sweden | 56.06°N 13.97°E | Winter | 640 |
Data for precipitation are from Hijmans et al. (2005), and life history refers to the requirement of vernalization for flowering (Winter) versus no requirement (Spring) as determined by a common garden greenhouse experiment.