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Repeatability of Model Genetic Coefficients Derived from Soybean Performance Trials across Different States

^a Dep. of Agricultural and Biological Engineering, Univ. of Florida, Gainesville, FL 32611
^b Dep. of Agronomy, Univ. of Florida, Gainesville, FL 32611
^c Crop Science Dep., North Carolina State Univ., Raleigh, NC 27695
^d Dep. of Biological and Agricultural Engineering, Univ. of Georgia, 30223

View larger version (21K): [in a new window]   Fig. 1. Comparison of critical daylengths (CSDL) (a), the time from first flower to physiological maturity (FLPM) (b), and leaf photosynthesis rates (LFMAX) (c), estimated for 10 soybean cultivars in Georgia and North Carolina. The 1:1 line (dot) and the regression line (solid) between the data are also shown.

View larger version (22K): [in a new window]   Fig. 2. Leaf photosynthesis rate (LFMAX) and seed filling duration (SFDUR) estimated for 10 soybean cultivars in Georgia (a) and North Carolina (b). The line shows the generic value for LFMAX. The bubble-size for each cultivar is based on the observed mean yield. The initials for each cultivar are also shown inside the bubbles (P for Perrin, C for Cook, S for Stonewall, Ha for Hagood, T for Thomas, col for Colquitt, B for Brim, Y for Young, Hu for Hutcheson, D for DP 105).

View larger version (23K): [in a new window]   Fig. 3. Leaf photosynthesis rate (LFMAX) versus observed mean cultivar yield for 10 soybean cultivars in Georgia and North Carolina. Regression lines between the data are also shown.

View larger version (38K): [in a new window]   Fig. 4. Comparison of simulated versus observed seed yield (a) and harvest maturity (b) for 10 soybean cultivars in Georgia with the coefficients developed in Georgia. The 1:1 line (dot) and the regression line (solid) between the data are also shown.

View larger version (38K): [in a new window]   Fig. 5. Comparison of simulated versus observed seed yield (a) and harvest maturity (b) for 10 soybean cultivars in Georgia with the coefficients developed in North Carolina. The 1:1 line (dot) and the regression line (solid) between the data are also shown.

View larger version (37K): [in a new window]   Fig. 6. Comparison of simulated versus observed seed yield (a) and harvest maturity (b) for 10 soybean cultivars in North Carolina with the coefficients developed in Georgia. The 1:1 line (dot) and the regression line (solid) between the data are also shown.