Three geographically separate domestications of Asian rice.
Three geographically separate domestications of Asian rice.
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DOI：
10.1038/nplants.2015.164
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发表时间：
2015-11-02
期刊：
影响因子：
18
通讯作者：
Brown TA
中科院分区：
文献类型：
--
作者：
Civáň P;Craig H;Cox CJ;Brown TA
驯化水稻（Oryza sativa L.）它伴随着亚洲文明的诞生，并已成为世界的主要作物之一。从考古学和遗传学证据的各种矛盾的方案起源的不同品种的栽培稻已被提出，最近的基础上一个单一的驯化2，3。通过研究不同栽培稻类型基因组中的选择足迹，我们发现在亚洲不同地区有三个独立的驯化。我们确定了中国南方和长江流域的野生种群作为粳稻基因库的来源，而印度支那和雅鲁藏布江流域的种群作为籼稻基因库的来源。我们揭示了一个迄今未被承认的原产地在印度中部或孟加拉国的澳大利亚品种。我们还得出结论，香稻是杂交粳稻和澳大利亚，而热带和温带版本的粳稻是后来适应一种作物。我们的结论是在雅阁证据表明，广泛的起源水稻种植1，4。因此，我们预计，我们的研究结果将刺激水稻驯化的遗传和考古研究之间更富有成效的合作，并指导利用遗传资源的育种计划，旨在作物改良。
Domesticated rice (Oryza sativa L.) accompanied the dawn of Asian civilization 1 and has become one of world's staple crops. From archaeological and genetic evidence various contradictory scenarios for the origin of different varieties of cultivated rice have been proposed, the most recent based on a single domestication 2, 3. By examining the footprints of selection in the genomes of different cultivated rice types, we show that there were three independent domestications in different parts of Asia. We identify wild populations in southern China and the Yangtze valley as the source of the japonica gene pool, and populations in Indochina and the Brahmaputra valley as the source of the indica gene pool. We reveal a hitherto unrecognized origin for the aus variety in central India or Bangladesh. We also conclude that aromatic rice is a result of a hybridization between japonica and aus, and that the tropical and temperate versions of japonica are later adaptations of one crop. Our conclusions are in accord with archaeological evidence that suggests widespread origins of rice cultivation 1, 4. We therefore anticipate that our results will stimulate a more productive collaboration between genetic and archaeological studies of rice domestication, and guide utilization of genetic resources in breeding programmes aimed at crop improvement.