Genomic paleontology provides evidence for two distinct origins of Asian rice (Oryza sativa L.)
Genomic paleontology provides evidence for two distinct origins of Asian rice (Oryza sativa L.)
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DOI：
10.1007/s00438-004-1069-6
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发表时间：
2004-12-01
影响因子：
3.1
通讯作者：
Panaud, O
中科院分区：
文献类型：
--
作者：
Vitte, C;Ishii, T;Panaud, O
水稻驯化的起源几十年来一直是争论的主题。我们比较了两个水稻品种，日本晴（粳稻型）和93-11（籼稻型）的基因组中的110个LTR反转录转座子的转座历史，其完整序列最近已公布。使用基因组古生物学方法，我们估计这两个基因组至少在20万年前彼此分开，即，在一个时间，这显然是早于日期驯化的作物（10,000年前，在晚期新石器时代）。此外，我们还通过对多种传统水稻品种（包括籼型和粳型）的插入多态性进行调查，补充并证实了这一首次计算机模拟分析。这些实验数据为籼稻和粳稻起源于亚洲两个独立的驯化事件提供了额外的证据。
The origin of rice domestication has been the subject of debate for several decades. We have compared the transpositional history of 110 LTR retrotransposons in the genomes of two rice varieties, Nipponbare (Japonica type) and 93-11 (Indica type) whose complete sequences have recently been released. Using a genomic paleontology approach, we estimate that these two genomes diverged from one another at least 200,000 years ago, i.e., at a time which is clearly older than the date of domestication of the crop (10,000 years ago, during the late Neolithic). In addition, we complement and confirm this first in silico analysis with a survey of insertion polymorphisms in a wide range of traditional rice varieties of both Indica and Japonica types. These experimental data provide additional evidence for the proposal that Indica and Japonica rice arose from two independent domestication events in Asia.