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Solomon Fekybelu, Yash   Chauhan, Daniel Rodriguez, John Dimes  SIMLESA workshop, Brisbane, Sep. 2011 Environmental charac...
E-characterization using simulation models <ul><li>helps identify stress types & frequency </li></ul><ul><li>Comprehensive...
<ul><li>Simulations (APSIM) </li></ul><ul><li>32 soil-site combinations (environments) </li></ul><ul><li>1890-2010 climate...
Clustering of probability distribution of  simulated yield
Yield cluster distribution follows a geographical pattern
Environment stress patterns
Clusters 4 & 5 have higher frequencies of terminal drought (sky blue and purple sections) No stress Mild Moderate Severe F...
Over 80% the variability in yield across environments was accounted by  drought frequencies in those environments
Summary <ul><li>The traditional maize breeding trial sites don't represent the potential TPE for maize in NE Australia </l...
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Environmental characteristisation for genotype by environment matching. SIMLESA workshop. Solomon Fekybelu

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Environmental characteristisation for genotype by environment matching. SIMLESA workshop. Solomon Fekybelu

  1. 1. Solomon Fekybelu, Yash Chauhan, Daniel Rodriguez, John Dimes SIMLESA workshop, Brisbane, Sep. 2011 Environmental characterisation for genotype by environment matching  
  2. 2. E-characterization using simulation models <ul><li>helps identify stress types & frequency </li></ul><ul><li>Comprehensive </li></ul><ul><li>cheaper </li></ul>Temp/Radiation. Rain Soil
  3. 3. <ul><li>Simulations (APSIM) </li></ul><ul><li>32 soil-site combinations (environments) </li></ul><ul><li>1890-2010 climate records used </li></ul><ul><li>‘ best bet management’ </li></ul><ul><li>Simulations outputs : </li></ul><ul><li>Simulated yield </li></ul><ul><li>Water supply demand ratios for Pioneer hybrid 3153 </li></ul><ul><li>Statistics : Cluster analysis </li></ul>Approaches of E-characterization
  4. 4. Clustering of probability distribution of simulated yield
  5. 5. Yield cluster distribution follows a geographical pattern
  6. 6. Environment stress patterns
  7. 7. Clusters 4 & 5 have higher frequencies of terminal drought (sky blue and purple sections) No stress Mild Moderate Severe Flowering
  8. 8. Over 80% the variability in yield across environments was accounted by drought frequencies in those environments
  9. 9. Summary <ul><li>The traditional maize breeding trial sites don't represent the potential TPE for maize in NE Australia </li></ul><ul><li>Drought seems to contribute to over 80% of production risk to maize in different environments in north-eastern Australia </li></ul><ul><li>Characterization drought frequencies will enhance our ability to breed, select and target drought tolerant/resistant germplasm in different environments </li></ul><ul><li>Combined analyses of G-M-E may help identify the most profitable scenarios, E.g. matching phenology with seasonal available soil moisture to minimize yield variability between seasons </li></ul>
  10. 10. Thank you

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