Table 1. Description of the environments used for the MET.
| Descriptor |
Environments (Tusón DTA-referenced) |
||||||||
|---|---|---|---|---|---|---|---|---|---|
| WI | IA | DE | MO | NC | nTX | cTX | FL | PR | |
| Planting date | 5/20/09 | 5/12/09 | 5/14/10 | 6/2/09 | 4/21/09 | 4/10/09 | 3/18/10 | 10/15/09 | 10/27/09 |
| Planting day of year | 140 | 132 | 134 | 153 | 111 | 100 | 77 | 288 | 300 |
| DTAa | 87 | 82 | 77 | 71 | 72 | 83 | 77 | 65 | 54 |
| Soil type | Silt loam | Silt clay loam | Sandy loam | Silt loam | Sandy clay | Clay loam | Clay | Loam | Clay loam |
| Latitude (decimal degree) | 43.05° | 42.03° | 39.67° | 38.89° | 35.67° | 33.60° | 30.55° | 25.50° | 18.00° |
| Longitude (decimal degree) | −89.53° | −93.77° | −75.75° | −92.20° | −78.49° | −101.91° | −96.43° | −80.50° | −66.51° |
| Altitude (m) | 331 | 332 | 33 | 271 | 107 | 990 | 118 | 2 | 10 |
| DLseb,c | 0.020 | 0.028 | 0.026 | 0.011 | 0.032 | 0.032 | 0.031 | −0.023 | −0.015 |
| DLstb,c | −0.010 | 0.001 | 0.001 | −0.012 | 0.019 | 0.020 | 0.026 | −0.019 | −0.011 |
| DLhtb,c | 15.3 | 15.2 | 15.0 | 14.8 | 14.3 | 14.1 | 13.4 | 10.9 | 11.2 |
| Daylength classificationd | LD | LD | LD | LD | LD | LD | NC | SD | SD |
| SRtb,c | 5983 | 6587 | 6246 | 6912 | 6403 | 6716 | 5851 | 4123 | 5305 |
| SATnb,c | 13.4 | 14.6 | 16.6 | 17.7 | 17.7 | 17.0 | 15.7 | 18.7 | 20.4 |
| SATmb,c | 17.9 | 19.4 | 20.4 | 23.6 | 22.3 | 23.0 | 20.7 | 23.0 | 26.1 |
| SATxb,c | 22.0 | 24.0 | 24.3 | 29.7 | 27.4 | 29.3 | 26.1 | 27.3 | 31.8 |
| SATrb,c | 4.4 | 4.9 | 4.3 | 6.5 | 5.4 | 6.5 | 5.7 | 4.4 | 5.8 |
| RHmb,c | 80.4 | 75.7 | 79.1 | 68.9 | 74.7 | 42.9 | 70.7 | 80.9 | 80.7 |
| ETtb,c | 0.24 | 0.23 | 0.25 | 0.27 | 0.23 | 0.33 | 0.33 | 0.14 | 0.15 |
| SADu06 (days under 6 °C)b | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 0 | 0 |
| SADo30 (days over 30 °C)b | 3 | 10 | 1 | 35 | 27 | 49 | 27 | 11 | 47 |
| SAGDDb | 1014 | 1073 | 1115 | 1139 | 1129 | 1213 | 1042 | 1097 | 966 |
| SAGDDu06b | 0 | 0 | 0 | 0 | 0 | 0 | 2 | 0 | 0 |
| SAGDDo30b | 4 | 20 | 0 | 121 | 62 | 211 | 109 | 7 | 120 |
Abbreviations: cTX, central TX; DTA: days to anthesis; DLht: hour of daylength at transition; DLse, slope of daylength at emergence; DLst: slope of daylength at transition; ETt, average of daily total evapotransipiration; LD, long day; MET, multi-environment trial; NC, not classified; nTX, north TX; RHm: average of daily relative humidity; SATm: average of daily mean soil-air temperature; SATn: average of daily minimum soil-air temperature; SRt, average of daily total solar radiation; SATr, average of daily range (max–min) in soil-air temperature; SATx, average of daily maximum soil-air temperature; SD, short day.
Mean DTA of the Tusón population.
Environment variable summarized as described in Materials and methods; here, based on the period from planting to the mean DTA date of the Tusón population.
Variable used for elastic net regession (see Materials and Methods: DLse; DLst; DLht; SRt; SATn; SATm; SATx; SATr; RHm; ETt).
Classification used for LD vs SD analysis; cTX was excluded due to uncertainty about LD/SD classification.