气候变化领域集成服务门户(CCPortal): Archaeological Central American maize genomes suggest ancient gene flow from South America

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DOI	10.1073/PNAS.2015560117
	Archaeological Central American maize genomes suggest ancient gene flow from South America
	Kistler L.; Thakar H.B.; VanDerwarker A.M.; Domic A.; Bergström A.; George R.J.; Harper T.K.; Allaby R.G.; Hirth K.; Kennett D.J.
发表日期	2021
ISSN	00278424
起始页码	33124
结束页码	33129
卷号	117 期号:52
英文摘要	Maize (Zea mays ssp. mays) domestication began in southwestern Mexico ∼9,000 calendar years before present (cal. BP) and humans dispersed this important grain to South America by at least 7,000 cal. BP as a partial domesticate. South America served as a secondary improvement center where the domestication syndrome became fixed and new lineages emerged in parallel with similar processes in Mesoamerica. Later, Indigenous cultivators carried a second major wave of maize southward from Mesoamerica, but it has been unclear until now whether the deeply divergent maize lineages underwent any subsequent gene flow between these regions. Here we report ancient maize genomes (2,300–1,900 cal. BP) from El Gigante rock shelter, Honduras, that are closely related to ancient and modern maize from South America. Our findings suggest that the second wave of maize brought into South America hybridized with long-established landraces from the first wave, and that some of the resulting newly admixed lineages were then reintroduced to Central America. Direct radiocarbon dates and cob morphological data from the rock shelter suggest that more productive maize varieties developed between 4,300 and 2,500 cal. BP. We hypothesize that the influx of maize from South America into Central America may have been an important source of genetic diversity as maize was becoming a staple grain in Central and Mesoamerica. © 2020 National Academy of Sciences. All rights reserved.
英文关键词	Agriculture; Ancient DNA; Archaeogenomics; Domestication; Maize
语种	英语
scopus关键词	Central America; gene flow; genetics; hybridization; maize; molecular evolution; plant breeding; plant genome; South America; Central America; Evolution, Molecular; Gene Flow; Genome, Plant; Hybridization, Genetic; Plant Breeding; South America; Zea mays
来源期刊	Proceedings of the National Academy of Sciences of the United States of America
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/179673
作者单位	Department of Anthropology, National Museum of Natural History, Smithsonian Institution, Washington, DC 20560, United States; Department of Anthropology, Texas A&M University, College Station, TX 77843, United States; Department of Anthropology, University of California, Santa Barbara, CA 93106, United States; Department of Anthropology, Pennsylvania State University, University Park, PA 16802, United States; Department of Geosciences, Pennsylvania State University, University Park, PA 16802, United States; Ancient Genomics Laboratory, Francis Crick Institute, NW1 1AT London, United Kingdom; School of Life Sciences, University of Warwick, Coventry, CV4 7AL, United Kingdom
推荐引用方式 GB/T 7714	Kistler L.,Thakar H.B.,VanDerwarker A.M.,et al. Archaeological Central American maize genomes suggest ancient gene flow from South America[J],2021,117(52).
APA	Kistler L..,Thakar H.B..,VanDerwarker A.M..,Domic A..,Bergström A..,...&Kennett D.J..(2021).Archaeological Central American maize genomes suggest ancient gene flow from South America.Proceedings of the National Academy of Sciences of the United States of America,117(52).
MLA	Kistler L.,et al."Archaeological Central American maize genomes suggest ancient gene flow from South America".Proceedings of the National Academy of Sciences of the United States of America 117.52(2021).