GRiSP Integrating Physiology, Crop Modeling and Genetics to Tackle Thermal Stresses in Rice: The RIDEV Approach Michael Dingkuhn (IRRI/CIRAD), Julie Mae Pasuquin (IRRI), Cecile Julia (CIRAD), Richard Pasco (IRRI), Jean-Christophe Soulie (CIRAD) funded by GIZ, AfricaRice, CCAFS and CIRAD Context of GRiSP Global Rice Phenotyping Network
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Th2_Integrating Physiology, Crop Modeling and Genetics
3rd Africa Rice Congress Theme 2: Intensification and diversification Mini symposium: determinants of agricultural productivity in Africa’s rice-based systems Author: Dingkuhn et al.
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GRiSPIntegrating Physiology, Crop
Modeling and Geneticsto Tackle Thermal
Stresses inRice:
The RIDEV Approach
Michael Dingkuhn (IRRI/CIRAD), Julie Mae Pasuquin
(IRRI), Cecile Julia (CIRAD), Richard Pasco (IRRI),
Jean-Christophe Soulie (CIRAD)
funded by GIZ, AfricaRice, CCAFS and CIRAD
Context of GRiSP Global Rice Phenotyping Network
GRiSP Rationale
Thermal adaptation is fundamental for agro-ecological fit
Temperature governs rice phenology and spikelet fertility
Climate change is changing thermal environments
Accuracy of crop models is still poor re: thermal effects
We need…
Better predictive tools to map climate change impact
Better understanding of adaptive traits: Physiology & Genetics
GRiSPHistory: The 1990s research at WARDA Thermal constraints to irrigated rice in Senegal
Effect of sowing date on crop duration and sterility
•Thermal and photoperiod effects on phenology•Chilling causes spikelet sterility
Days to flowering
% sterility % sterility
Tw(min) at bootingSowing dateSowing date
Þ 1995 development of RIDEV predicting phenology and thermal sterility as risk analysis and decision aide for cropping calendars
GRiSPNew study on rice phenology and sterility responses to T
(Thesis of Cecile Julia & ongoing CIRAD/IRRI/CCAFS project)
Emphasis on microclimate Meristem T => phenology Floodwater T => chilling stress at microspore stage Panicle T => heat stress at anthesis Time of day of anthesis (TOA)
RIDEV v.2 to characterize genetic diversity
NEW
NEW
GRiSP
Date01/08 11/08 21/08 31/08 10/09 20/09 30/09
Tem
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(°C
)
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Date
01/03 11/03 21/03 31/03 10/04 20/04 30/04 T
empe
ratu
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°C)
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Tair Max Tair Min Twater max Twater min
Date
15/01 25/01 04/02 14/02 24/02 06/03 16/03 26/03
Tem
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(°C
)
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Date10/05 20/05 30/05 09/06 19/06
Tem
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(°C
)
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France - Temperate Summer 2009
VP
D (
KP
a)
012345
Senegal - Cold and dry season 2010
VP
D (
KP
a)
012345
Senegal - Hot and dry season 2010
VP
D (
KP
a)
012345
Philippines - Hot and dry season 2009
VP
D (
KP
a)
012345
Scope of study:
4 genotypesIR64IR72Sahel108Chomrong(N22 failed)
4 environmentsDS PhilippinesHDS SenegalCDS SenegalTemp. summer France
Heuristic parameterization of genotypes (reverse mode) Phenomics (extraction of genotypic parameter values
from experimental data)
GRiSP Outlook
Indica GWAS panel (>200 acc., ORYTAGE project)
Field-phenotyped for phenology and sterility in 12 environments: 6 sowing dates in Senegal 3 altitudes x 2 years in Madagascar
Extraction of genotypic response parameters across environments (Heuristics): Cardinal temperatures Tb and To Thermal duration of phenological phases Photoperiod-sensitivity Chilling sensitivity of microsporogenesis Chilling sensitivity of panicle exertion Heat sensitivity of anthesis
Association study using GBS and 700K Oryza SNP chip