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A domestication history of dynamic adaptation and genomic deterioration in Sorghum

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Smith, Oliver, Nicholson, William V., Kistler, Logan, Mace, Emma, Clapham, Alan, Rose, Pamela, Stevens, Chris, Ware, Roselyn, Samavedam, Siva, Barker, Guy C., Jordan, David, Fuller, Dorian Q. and Allaby, Robin G. (2019) A domestication history of dynamic adaptation and genomic deterioration in Sorghum. Nature Plants, 5 (4). pp. 369-379. doi:10.1038/s41477-019-0397-9

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Official URL: http://dx.doi.org/10.1038/s41477-019-0397-9

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Abstract

The evolution of domesticated cereals was a complex interaction of shifting selection pressures and repeated episodes of introgression. Genomes of archaeological crops have the potential to reveal these dynamics without being obscured by recent breeding or introgression. We report a temporal series of archaeogenomes of the crop sorghum (Sorghum bicolor) from a single locality in Egyptian Nubia. These data indicate no evidence for the effects of a domestication bottleneck, but instead reveal a steady decline in genetic diversity over time coupled with an accumulating mutation load. Dynamic selection pressures acted sequentially to shape architectural and nutritional domestication traits and to facilitate adaptation to the local environment. Later introgression between sorghum races allowed the exchange of adaptive traits and achieved mutual genomic rescue through an ameliorated mutation load. These results reveal a model of domestication in which genomic adaptation and deterioration were not focused on the initial stages of domestication but occurred throughout the history of cultivation.

Item Type: Journal Article
Subjects: S Agriculture > SB Plant culture
Divisions: Faculty of Science > Life Sciences (2010- )
Library of Congress Subject Headings (LCSH): Sorghum -- History
Journal or Publication Title: Nature Plants
Publisher: Nature Publishing Group
ISSN: 2055-026X
Official Date: 8 April 2019
Dates:
DateEvent
8 April 2019Published
28 February 2019Accepted
Date of first compliant deposit: 11 April 2019
Volume: 5
Number: 4
Page Range: pp. 369-379
DOI: 10.1038/s41477-019-0397-9
Status: Peer Reviewed
Publication Status: Published
Access rights to Published version: Restricted or Subscription Access
RIOXX Funder/Project Grant:
Project/Grant IDRIOXX Funder NameFunder ID
NE/L006847/1[NERC] Natural Environment Research Councilhttp://dx.doi.org/10.13039/501100000270
NE/L012030/1[NERC] Natural Environment Research Councilhttp://dx.doi.org/10.13039/501100000270
323842European Research Councilhttp://viaf.org/viaf/130022607

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