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This article in CS

  1. Vol. 51 No. 5, p. 1887-1902
    Received: Aug 6, 2010

    * Corresponding author(s): aran@kku.ac.th


Designing a Peanut Ideotypefor a Target Environment Using the CSM-CROPGRO-Peanut Model

  1. B. Suriharna,
  2. A. Patanothai *a,
  3. K. J. Booteb and
  4. Gerrit Hoogenboomc
  1. a Dep. of Plant Science and Agricultural Resources, Faculty of Agriculture, Khon Kaen Univ., Khon Kaen 40002, Thailand
    b Dep. of Agronomy, Univ. of Florida, Gainesville, FL 32611-0500
    c Dep. of Biological and Agricultural Engineering, the Univ. of Georgia, Griffin, GA 30223-1797. Current Address: AgWeatherNet, Washington State Univ., Prosser WA 99350-8694


Crop simulation models have potential for evaluating the effects of plant traits leading to the design of a crop ideotype for a target environment. The objective of this study was to design a large-seeded and a small-seeded peanut (Arachis hypogaea L.) ideotype for Thailand using the cropping system model (CSM)-CROPGRO-Peanut model. The sensitivity analysis was performed, utilizing the cultivar coefficients of a large-seeded line (L-line) and a small-seeded peanut line (S-line) as initial values, by changing the value of each coefficient for consecutive runs of model simulation over 10 locations for three growing seasons and 30 yr. The durations of the developmental phases were adjusted first to maximize seed yield within a fixed life cycle duration. Then the growth and the partitioning parameters were adjusted to maximize biomass and seed yield, respectively. The final outcomes were the designed peanut ideotypes with the following characteristics: early flowering, long duration from beginning seed to maturity and from first flower to end of leaf expansion, large leaf size, high specific leaf area, high leaf photosynthetic rate, high partitioning of assimilates to pods and seeds, more determinate growth habit, and moderately long seed filling duration. Seed yield improvements of 4.03 and 52.91% were achieved over the L- and S-lines, respectively. This study demonstrates the capability of the CSM-CROPGRO-Peanut model for evaluating the effects of different genetic traits and for designing a crop ideotype for a target environment.

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