Journal
NATURE GENETICS
Volume 51, Issue 5, Pages 896-+Publisher
NATURE PORTFOLIO
DOI: 10.1038/s41588-019-0382-2
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Funding
- Agriculture and Food Research Initiative Competitive from the USDA National Institute of Food and Agriculture [2017-67007-25939, 2016-67013-24473]
- Bill and Melinda Gates Foundation
- Kansas Wheat Commission
- Canadian Triticum Applied Genomics grant - Genome Canada
- Genome Prairie
- Saskatchewan Ministry of Agriculture
- Western Grains Research Foundation
- US National Science Foundation [IOS-1339393]
- Corteva Agriscience, Agriculture Division of DowDuPont
- NSF [ACI-144054]
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Introgression is a potential source of beneficial genetic diversity. The contribution of introgression to adaptive evolution and improvement of wheat as it was disseminated worldwide remains unknown. We used targeted re-sequencing of 890 diverse accessions of hexaploid and tetraploid wheat to identify wild-relative introgression. Introgression, and selection for improvement and environmental adaptation, each reduced deleterious allele burden. Introgression increased diversity genome wide and in regions harboring major agronomic genes, and contributed alleles explaining a substantial proportion of phenotypic variation. These results suggest that historic gene flow from wild relatives made a substantial contribution to the adaptive diversity of modern bread wheat.
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