Phylogeography of Asian wild rice, Oryza rufipogon, reveals multiple independent domestications of cultivated rice, Oryza sativa
Phylogeography of Asian wild rice, Oryza rufipogon, reveals multiple independent domestications of cultivated rice, Oryza sativa
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DOI：
10.1073/pnas.0603152103
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发表时间：
2006-06-20
影响因子：
11.1
通讯作者：
Schaal, Barbara A.
中科院分区：
文献类型：
--
作者：
Londo, Jason P.;Chiang, Yu-Chung;Schaal, Barbara A.
栽培稻（Oryza sativa L.）是世界上最重要的主粮作物，养活了一半以上的人口。尽管栽培稻在世界农业中发挥着重要作用，但栽培稻从其野生祖先野生稻 (Oryza rufipogon) 驯化的历史仍不清楚。在本研究中，通过系统发育地理学方法检查了三个基因区域的 DNA 序列变异，以研究栽培稻的驯化。结果表明，印度和印度支那可能代表普通野生稻多样性的祖先中心。此外，数据表明，栽培稻至少被驯化两次，来自不同的普通野生稻种群，这两次独立驯化事件的产物是两个主要水稻品种：籼稻和粳稻。根据这一地理分析，籼稻是在喜马拉雅山脉以南地区驯化的，可能是印度东部、缅甸和泰国，而粳稻是在中国南部由野生稻驯化的。
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.