Presented by Michael Dingkuhn at the CCAFS Workshop on Developing Climate-Smart Crops for a 2030 World, ILRI, Addis Ababa, Ethiopia, 6-8 December 2011.

1. Determination of Environment Groups
and TPE Characterization (Zoom-in)
Bryan Alexandre (EMBRAPA)
Developing Climate-Smart Crops for a 2030 World Workshop
ILRI, Addis Ababa, Ethiopia
6-8 December 2011

2. UPLAND RICE PRODUCTION AREA
• Approach “Survey”: Historical Upland Rice Yield
Data from 1976 to 2006 (free)

3. YIELD DETREND
Historical Yield = interaction (climate variability x technological advances)

4. 100
80
Probability of Exceeding (%)
60
40
20
LFE
FE
HFE
0
500 1000 1500 2000 2500 3000 3500 4000
-1
Adjusted Yield (kg ha )

5. Checking Environment Groups with MTEs
Enviroments for the Mult Trial Experiments
HFE FE LFE
Uncertainty
150235 436484 656363
index

6. Environment Group Characterization
• Enviroment Group → Target Population Enviroment;
– Define the main constraints for increasing yield;
• HOW???
– Participatory Breeding;
– Work Researcher Time Meetings;
– Mult Trial Experiments (MTEs) and other technics.
• Example: Main Constraints – DROUGTH
– Application of crop model (RICE – ECOTROP, CIRAD) for TPE
characterization (water stress index)

7. PROFILE STRESS FOR THE TPE
UPLAND RICE SHORT CULTIVAR
Days After Emergence
24 31 38 45 52 59 67 73 80
1.0
0.9
0.8
Estress Level
0.7
0.6
stress L – no soil amendment
stress M – no soil amendment
stress T – no soil amendment
stress L – soil amendment
0.5
stress M – soil amendment
stress T – oil amendment
Reproductive Grain Filling Phase
0.4
400 500 600 700 800 900 1000 1100 1200
Degree Days ( C.Day)

8. TPE x Site (Planting Date)
L M T
cnpaf-dec-31
No Soil Amendment
cnpaf-dec-15
cnpaf-dec-01
cnpaf-nov-15
cnpaf-nov-01
TPE-dec-31
TPE-dec-15
TPE-dec-01
TPE-nov-15
TPE-nov-01
TPE-dec-31
TPE-dec-15
Soil Amendment
TPE-dec-01
TPE-nov-15
TPE-nov-01
cnpaf-dec-31
cnpaf-dec-15
cnpaf-dec-01
cnpaf-nov-15
cnpaf-nov-01
0 10 20 30 40 50 60 70 80 90 100
Frequency of Stress (%)

9. TPE x Interannual and Site Variation
Soil Amendment Scenario
TPE Site 1 Site 2
T M L T M L T M L
1999
2000
Year
2001
2002
2003
Stress Frequence (%) Stress Frequence (%) Stress Frequence (%)