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System Analysis of Plant Traits to Increase Grain Yield on Limited Water Supplies

^a USDA-ARS, Agron. Physiol. and Genet. Lab., Univ. of Florida, P.O. Box 110965, Gainesville, FL 32611-0965
^b CSIRO, Cunningham Lab., Division of Tropical Crops and Pastures, 306 Carmody Rd., St. Lucia, Brisbane, QLD 4067, Australia

View larger version (13K): [in a new window]   Fig. 1. Plot for each of 20 yr of simulated maize yield against precipitation during the growing season at Columbia, MO

View larger version (24K): [in a new window]   Fig. 2. Plot of the fraction of transpirable soil water (FTSW) against days after sowing for simulated maize crops in 1982 with a depth of water extraction of 80 or 100 cm. The crop with an 80-cm depth of water extraction was terminated in the simulations on Day 103

View larger version (17K): [in a new window]   Fig. 3. Yield change in each year from a maize crop with an 80-cm depth of water extraction to a crop with 100- or 120-cm depth of water extraction plotted against yield simulated for the crop with an 80-cm depth of extraction

View larger version (15K): [in a new window]   Fig. 4. Yield change in each year from a maize crop with a leaf area of the largest leaf (AMAX) of 750 cm2 to a crop with a largest leaf of only 500 cm2 plotted against yield simulated for the crop with a largest leaf of 750 cm2

View larger version (16K): [in a new window]   Fig. 5. Yield change in each year from a maize crop with a relatively rapid leaf appearance rate to a crop with a relatively slow leaf appearance rate plotted against yield simulated for the crop with a relatively rapid leaf appearance rate

View larger version (14K): [in a new window]   Fig. 6. Yield change in each year from a maize crop with a radiation use efficiency (RUE) of 1.6 g MJ-1 to a crop with an RUE of 1.25 g MJ-1 plotted against yield simulated for the crop with an RUE of 1.6 g MJ-1

View larger version (18K): [in a new window]   Fig. 7. Yield change in each year from a maize crop with normal stomata closure with respect to the fraction of transpirable soil water (FTSW) to a crop with (A) an early closure of stomata and (B) a late closure of stomata plotted against yield simulated for the crop with normal stomata closure

View larger version (14K): [in a new window]   Fig. 8. Yield change in each year from a maize crop with a maize-like linear increase in harvest index (DHI) of 0.015 HI d-1 to a crop with a greater DHI of 0.0185 HI d-1 plotted against yield simulated for the crop with a maize-like DHI

View larger version (14K): [in a new window]   Fig. 9. Yield change in each year from a crop with maize-like traits to a crop with a combination of sorghum-like traits plotted against yield simulated for the maize crop