Table 4.
The first two principal components of latitude and climatic variables for the sites of origin of the Arabidopsis thaliana accessions: (A) loadings using uncalibrated climatic data; (B) loadings using calibrated climatic data
| PC 1 | PC 2 | |
|---|---|---|
| (A) Uncalibrated climatic data | ||
| Latitude | −0·33508 | 0·10387 |
| April temperature | 0·4422996 | 0·259163 |
| May temperature | 0·432090 | −0·224204 |
| June temperature | 0·421939 | −0·182346 |
| April precipitation | −0·310449 | −0·258991 |
| May precipitation | −0·335544 | −0·223903 |
| June precipitation | −0·315465 | −0·214989 |
| April DTR | 0·029086 | 0·435281 |
| May DTR | 0·063648 | 0·488185 |
| June DTR | 0·113446 | 0·497298 |
| (B) Calibrated climatic data | ||
| Latitude difference | −0·133560 | 0·389558 |
| April temperature difference | −0·366394 | 0·306957 |
| May temperature difference | −0·329747 | 0·325338 |
| June temperature difference | −0·379463 | 0·240226 |
| April precipitation difference | 0·334009 | 0·092603 |
| May precipitation difference | 0·377745 | 0·097140 |
| June precipitation difference | 0·411995 | 0·029593 |
| April DTR difference | 0·097649 | 0·426165 |
| May DTR difference | 0·229438 | 0·483063 |
| June DTR difference | 0·330183 | 0·395745 |
DTR, Daily temperature range.