The relative importance of mercury methylation and demethylation in rice paddy soil varies depending on the presence of rice plants
- Award ID(s):
- 1740839
- PAR ID:
- 10399833
- Date Published:
- Journal Name:
- Ecotoxicology and Environmental Safety
- Volume:
- 230
- Issue:
- C
- ISSN:
- 0147-6513
- Page Range / eLocation ID:
- 113143
- Format(s):
- Medium: X
- Sponsoring Org:
- National Science Foundation
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null (Ed.)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.more » « less
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