生物扩散
驯化
温带气候
水稻
非生物成分
种子散布
生物
粳稻
地理
生态学
生物地理学
进化生物学
人口
人口历史
遗传多样性
遗传变异
植物
基因
遗传学
社会学
人口学
作者
Rafal M. Gutaker,Simon C. Groen,Emily S. Bellis,Jae Sue Choi,Inês Pires,R. Kyle Bocinsky,Emma Slayton,Olivia Wilkins,Cristina Castillo,Sónia Negrão,M. Beatriz P.P. Oliveira,Dorian Q. Fuller,Jade d'Alpoim Guedes,Jesse R. Lasky,Michael D. Purugganan
摘要
ABSTRACT Rice ( Oryza sativa ) is one of the world’s most important food crops. We reconstruct the history of rice dispersal in Asia using whole-genome sequences of >1,400 landraces, coupled with geographic, environmental, archaeobotanical and paleoclimate data. We also identify extrinsic factors that impact genome diversity, with temperature a leading abiotic factor. Originating ∼9,000 years ago in the Yangtze Valley, rice diversified into temperate and tropical japonica during a global cooling event ∼4,200 years ago. Soon after, tropical rice reached Southeast Asia, where it rapidly diversified starting ∼2,500 yBP. The history of indica rice dispersal appears more complicated, moving into China ∼2,000 yBP. Reconstructing the dispersal history of rice and its climatic correlates may help identify genetic adaptation associated with the spread of a key domesticated species. One sentence summary We reconstructed the ancient dispersal of rice in Asia and identified extrinsic factors that impact its genomic diversity.
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