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Nat Genet. 2019 Feb;51(2):319-326. doi: 10.1038/s41588-018-0266-x. Epub 2018 Nov 12.

Genebank genomics highlights the diversity of a global barley collection.

Author information

1
Leibniz Institute of Plant Genetics and Crop Plant Research (IPK) Gatersleben, Seeland, Germany.
2
Agriculture and Food, The Commonwealth Scientific and Industrial Research Organisation, Canberra, Australia.
3
Institute of Plant Science and Resources, Okayama University, Kurashiki, Japan.
4
University of Dundee at the James Hutton Institute, Invergowrie, UK.
5
Department of Economic Development, Jobs, Transport and Resources, Centre for AgriBioscience, Agriculture Victoria Research, Bundoora, Victoria, Australia.
6
Institute of Crop Sciences, Chinese Academy of Agricultural Sciences, Beijing, China.
7
Department of Plant and Microbial Biology, University of Zurich, Zurich, Switzerland.
8
Biological and Environmental Science and Engineering Division, King Abdullah University of Science and Technology, Thuwal, Saudi Arabia.
9
Institute for Resistance Research and Stress Tolerance, Julius Kühn Institute (Federal Research Centre for Cultivated Plants), Quedlinburg, Germany.
10
Leibniz Institute of Plant Genetics and Crop Plant Research (IPK) Gatersleben, Seeland, Germany. mascher@ipk-gatersleben.de.
11
German Centre for Integrative Biodiversity Research (iDiv) Halle-Jena-Leipzig, Leipzig, Germany. mascher@ipk-gatersleben.de.
12
Leibniz Institute of Plant Genetics and Crop Plant Research (IPK) Gatersleben, Seeland, Germany. stein@ipk-gatersleben.de.
13
Center for Integrated Breeding Research, Georg-August-Universität Göttingen, Göttingen, Germany. stein@ipk-gatersleben.de.

Abstract

Genebanks hold comprehensive collections of cultivars, landraces and crop wild relatives of all major food crops, but their detailed characterization has so far been limited to sparse core sets. The analysis of genome-wide genotyping-by-sequencing data for almost all barley accessions of the German ex situ genebank provides insights into the global population structure of domesticated barley and points out redundancies and coverage gaps in one of the world's major genebanks. Our large sample size and dense marker data afford great power for genome-wide association scans. We detect known and novel loci underlying morphological traits differentiating barley genepools, find evidence for convergent selection for barbless awns in barley and rice and show that a major-effect resistance locus conferring resistance to bymovirus infection has been favored by traditional farmers. This study outlines future directions for genomics-assisted genebank management and the utilization of germplasm collections for linking natural variation to human selection during crop evolution.

PMID:
30420647
DOI:
10.1038/s41588-018-0266-x
[Indexed for MEDLINE]

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