Phylogeography of Asian wild rice, Oryza rufipogon, reveals multiple independent domestications of cultivated rice, Oryza sativa

Cultivated rice, Oryza sativa L., represents the world's most important staple food crop, feeding more than half of the human population. Despite this essential role in world agriculture, the history of cultivated rice's domestication from its wild ancestor, Oryza rufipogon, remains unclea...

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Bibliographic Details
Published in:Proceedings of the National Academy of Sciences - PNAS 2006-06, Vol.103 (25), p.9578-9583
Main Authors: Londo, J.P, Chiang, Y.C, Hung, K.H, Chiang, T.Y, Schaal, B.A
Format: Article
Language:English
Subjects:
Asia
Base Sequence
Biodiversity
Biological Sciences
Botany
Cell Nucleus - genetics
Chloroplasts - genetics
Crops, Agricultural - classification
Crops, Agricultural - genetics
Deoxyribonucleic acid
DNA
Evolution
Food crops
Genetic diversity
Genetic variation
Genetic Variation - genetics
Geographic regions
Haplotypes
Molecular Sequence Data
Oryza - classification
Oryza - genetics
Oryza rufipogon
Oryza sativa
Oryza sativa indica
Oryza sativa japonica
Phylogeny
Plant domestication
Plant Proteins - genetics
Plants
Ribulose-Bisphosphate Carboxylase - genetics
Rice
Studies
Wild rice
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Summary:Cultivated rice, Oryza sativa L., represents the world's most important staple food crop, feeding more than half of the human population. Despite this essential role in world agriculture, the history of cultivated rice's domestication from its wild ancestor, Oryza rufipogon, remains unclear. In this study, DNA sequence variation in three gene regions is examined in a phylogeographic approach to investigate the domestication of cultivated rice. Results indicate that India and Indochina may represent the ancestral center of diversity for O. rufipogon. Additionally, the data suggest that cultivated rice was domesticated at least twice from different O. rufipogon populations and that the products of these two independent domestication events are the two major rice varieties, Oryza sativa indica and Oryza sativa japonica. Based on this geographical analysis, O. sativa indica was domesticated within a region south of the Himalaya mountain range, likely eastern India, Myanmar, and Thailand, whereas O. sativa japonica was domesticated from wild rice in southern China.
ISSN:0027-8424
1091-6490
DOI:10.1073/pnas.0603152103