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The Rise and Fall of African Rice Cultivation Revealed by Analysis of 246 New Genomes

Authors: François Sabot; François Sabot; Karine Labadie; Patrick Wincker; Patrick Wincker; Christian Dupuy; Yves Vigouroux; +15 Authors

The Rise and Fall of African Rice Cultivation Revealed by Analysis of 246 New Genomes

Abstract

African rice (Oryza glaberrima) was domesticated independently from Asian rice. The geographical origin of its domestication remains elusive. Using 246 new whole-genome sequences, we inferred the cradle of its domestication to be in the Inner Niger Delta. Domestication was preceded by a sharp decline of most wild populations that started more than 10,000 years ago. The wild population collapse occurred during the drying of the Sahara. This finding supports the hypothesis that depletion of wild resources in the Sahara triggered African rice domestication. African rice cultivation strongly expanded 2,000 years ago. During the last 5 centuries, a sharp decline of its cultivation coincided with the introduction of Asian rice in Africa. A gene, PROG1, associated with an erect plant architecture phenotype, showed convergent selection in two rice cultivated species, Oryza glaberrima from Africa and Oryza sativa from Asia. In contrast, a shattering gene, SH5, showed selection signature during African rice domestication, but not during Asian rice domestication. Overall, our genomic data revealed a complex history of African rice domestication influenced by important climatic changes in the Saharan area, by the expansion of African agricultural society, and by recent replacement by another domesticated species.

Country
France
Keywords

Crops, Agricultural, 570, Climate Change, Middle Niger Valley, Population Dynamics, 590, [SDV.GEN.GPL]Life Sciences [q-bio]/Genetics/Plants genetics, Domestication, domestication, moyenne vallée du Niger, [SDV.GEN.GPO]Life Sciences [q-bio]/Genetics/Populations and Evolution [q-bio.PE], [SHS.ARCHEO] Humanities and Social Sciences/Archaeology and Prehistory, protohistoire, Oryza, protohistory, Phylogénétique, Phylogenetics, [SDV] Life Sciences [q-bio], Africa, riz africain (Oryza glaberrima), Genome, Plant, African rice (Oryza glaberrima)

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citations
This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Citations provided by BIP!
popularity
This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
BIP!Popularity provided by BIP!
influence
This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Influence provided by BIP!
impulse
This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
BIP!Impulse provided by BIP!
82
Top 1%
Top 10%
Top 1%
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