Beating the Heat: Breeding Common Bean for Increased ...
Transcript of Beating the Heat: Breeding Common Bean for Increased ...
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Beating the Heat:
Breeding Common Bean for Increased Temperatures
Steve Beebe Idupulapati Rao
José Polanía César Cajiao
Miguel Grajales Santos Barrera Nestor Chavés Julián Ramirez David Arango
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Common Bean Production and Consumption in ES Africa
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Bean expenditure by economic strata
Quintile 1 Quintile 2 Quintile 3 Quintile 4 Quintile 5Rural 408.23 675.71 917.63 1087.3 1237.1Urban 462.57 788.54 818.07 686 832.87
0
200
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Per c
apita
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Figure 2: Per capita real bean expenditures (UGX) in the past 7 days, per wealth quintile, Rural and Urban Uganda
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Estimates of Bean Adaptability Now and in 2050
Current adaptability The “do-nothing” scenario
Julian Ramirez
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What is our strategy?
• Defense?
• …or go on the Offensive?
• “The best defense is a good offence.”
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Phaseolus spp. originated over a range of ecological niches
SECONDARY Pool • coccineus • dumosus • costaricensis
Disease resistance
Large biomass
Root systems
TERTIARY Pool • acutifolius • parvifolius
Drought tolerance
Heat tolerance
Pest res.
Good HI
Common Bean
HUMID-SUB HUMID SUB-HUMID to DRY ARID
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High Temperature
Research Sites
Caribia Motilonia Turipaná
STATIONS Armero
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Interspecific lines– Armero, Tolima, Colombia
SEF 14 SEF 43 SEF 60
Pollen viability: 83.54%
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Antera SER 16 Antera G 40001 (Phaseolus acutifolius)
Polen G 40001 Viabilidad > 90%
Polen SER 16 Viabilidad entre
20 – 30 %
Heat Stress on Anthers and Pollen Viability
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Pollen Viability With and Without Heat Stress
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SEF 28
SEF 60
Armero – CIAT - 2013
Heat Stress Effects on Grain Filling
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New High temperature facility
Nestor Chavés; José Polanía
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What is our strategy?
• Defense?
• …or go on the Offensive?
• “The best defense is a good offence.”
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Estimates of Bean Adaptability with Heat Tolerant Beans with 3oC advantage
Current adaptability The “do-nothing” scenario
Plus 3 degrees adaptation
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40 years of bean research at CIAT
’75 ’80 ’85 ’90 ’95 ’00
Resistance to biotic constraints
Tolerance to drought
Tolerance to high aluminum and low phosphorus
Research on genetic resources
DNA technology Nutritional quality
’05 ’10
Improving biological nitrogen fixation
’15
Heat tolerance
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F1’s of Common bean x Sister spp.
Santos Barrera; Roosevelt Escobar
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Threats of Excess Rainfall
David Arango