Dual origin of the cultivated rice based on molecular markers of newly collected annual and perennial strains of wild rice species, Oryza nivara and O. rufipogon
Dual origin of the cultivated rice based on molecular markers of newly collected annual and perennial strains of wild rice species, Oryza nivara and O. rufipogon
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DOI：
10.1023/a:1023926802198
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发表时间：
2003-02
影响因子：
2
通讯作者：
S. Yamanaka;I. Nakamura;H. Nakai;Yo-ichiro Sato
中科院分区：
文献类型：
--
作者：
S. Yamanaka;I. Nakamura;H. Nakai;Yo-ichiro Sato
水稻的直系祖先（Oryza sativaL.）被认为是亚洲水稻的AA基因组野生近缘种。然而，AA基因组野生近缘种包括一年生和多年生形式。本文分析了水稻（O.rufipogonsensu lato） AA基因组野生近缘不同材料中蜡质位点上的反转录转座子p-SINE1-r2的分布。大多数一年生野生稻品种都含有这种反转录转座子，而大多数多年生类型缺乏这种元素，这与以往的研究结果相矛盾。本研究结果表明：sativa具有双重起源，导致籼粳分化。结果表明，水稻品种的指标来源于AA基因组的一年生基因库，粳稻品种来源于AA基因组野生稻的多年生基因库。
The direct ancestor of rice (Oryza sativaL.) is believed to be AA genome wild relatives of rice in Asia. However, the AA genome wild relatives involve both annual and perennial forms. The distribution of the retrotransposon p-SINE1-r2, a short interspersed nuclear element (SINE) at the waxy locus was analyzed in diverse accessions of the AA genome wild relatives of rice (O.rufipogonsensu lato). Most annual wild rice accessions had this retrotransposon, while most perennial types lacked this element, contradicting results to the previous studies. Results presented here suggest thatO.sativahas dual origin that lead toindica-japonicadifferentiation. Results suggest theindicaline of rice varieties evolved from the annual genepool of AA genome and thejaponicavarieties from the perennial genepool of AA genome wild rice.