Unlocking Agriculture's Past
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Unlocking agriculture’s past to feed the future world Jacob van Etten
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A presentation given at the National Geographic store in Madrid on July 28, 2011.
Transcript of Unlocking Agriculture's Past
Unlocking agriculture’s past to feed the future worldJacob van Etten
Feeding the future world1
IPCC, 2007
-95 to -31-30 to -11-10 to -101 to 2930 to 4748 to 98
Andrew Jarvis, CIAT/CCAFS
% change
Change in suitability due to climate change50 crops, to 2050
D. Lobell et al. 2011
The past is the key to the future2
China, 6000 years before present
?
?
?
Genetic change early farmers select
The science of agricultural origins3
Nikolai I. Vavilov (1887-1943)Centres of origin
Flotation
Rice spikelet basesWhich is the domesticated one?
14C radiocarbon datingaccelerator mass spectrometry (AMS)
Phytolithsscanning electron microscope (SEM)
Experimental archaeology
BonesWas agriculture such a good idea after all?
DNA analysis“Old” DNA recovery
Current patternsof genetic diversity
Heritage of the past: agricultural diversity4
Transfer of genes from CWR to crops
“Scuba rice”Flood-tolerance gene from landrace
Photo: J. Cherfas, Bioversity International
Photo: J. Cherfas, Bioversity International
Geography: the power of
maps and models5
Seed samplesavailable from the multilateral system
Gaps in the collectionsexample for sorghum
Archaeological dataMaize origin in Mexico
Overlapping part of the dispersal route
Origin of dispersal
Divergent part of the dispersal route
predicted genetic distance
mea
sure
d ge
netic
dist
ance
R2 = 0.44
+Interactive online mapping
