Genomic history and ecology of the geographic spread of rice
Genomic history and ecology of the geographic spread of rice
复制标题
水稻地理传播的基因组历史和生态学
DOI：
10.1038/s41477-020-0659-6
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发表时间：
2020-05-01
期刊：
影响因子：
18
通讯作者：
Purugganan, Michael D.
中科院分区：
文献类型：
--
作者：
Gutaker, Rafal M.;Groen, Simon C.;Purugganan, Michael D.
水稻（Oryza sativa）是世界上最重要的粮食作物之一，主要由粳稻和籼稻亚种组成。在这里，我们利用1,400多个地方品种的全基因组序列，结合地理、环境、古植物学和古气候数据，重建了亚洲水稻传播的历史。水稻起源于大约9,000年前的长江流域，在大约4,200年前的全球变冷事件中分化为温带和热带粳稻。不久之后，热带粳稻到达东南亚，在那里它迅速多样化，大约从2,500年前开始。籼稻传播的历史似乎更复杂，大约在2,000年前进入中国。我们还确定了影响基因组多样性的外在因素，温度是一个主要的非生物因素。重建水稻的传播历史及其与气候的相关性可能有助于识别与关键驯化物种传播相关的遗传适应。利用地理、环境、古植物学和古气候数据重建9,000多年来粳稻和籼稻的基因组历史。
Rice (Oryza sativa) is one of the world's most important food crops, and is comprised largely of japonica and indica subspecies. Here, we reconstruct the history of rice dispersal in Asia using whole-genome sequences of more than 1,400 landraces, coupled with geographic, environmental, archaeobotanical and paleoclimate data. Originating around 9,000 yr ago in the Yangtze Valley, rice diversified into temperate and tropical japonica rice during a global cooling event about 4,200 yr ago. Soon after, tropical japonica rice reached Southeast Asia, where it rapidly diversified, starting about 2,500 yr bp. The history of indica rice dispersal appears more complicated, moving into China around 2,000 yr bp. We also identify extrinsic factors that influence genome diversity, with temperature being a leading abiotic factor. Reconstructing the dispersal history of rice and its climatic correlates may help identify genetic adaptations associated with the spread of a key domesticated species.A reconstruction of the genomic history of japonica and indica rice over 9,000 yr with geographic, environmental, archaeobotanical and paleoclimate data.