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