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Multiregional origins of the domesticated tetraploid wheats

2020Journal article Open Access
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dc.contributor.authorOliveira, Hugo R.
dc.contributor.authorJacocks, Lauren
dc.contributor.authorCzajkowska, Beata I.
dc.contributor.authorKennedy, Sandra L.
dc.contributor.authorBrown, Terence A.
dc.date.accessioned2020-06-05T12:19:41Z
dc.date.available2020-06-05T12:19:41Z
dc.date.issued2020
dc.description.abstractWe used genotyping-by-sequencing (GBS) to investigate the evolutionary history of domesticated tetraploid wheats. With a panel of 189 wild and domesticated wheats, we identified 1,172,469 single nucleotide polymorphisms (SNPs) with a read depth ≥3. Principal component analyses (PCAs) separated the Triticum turgidum and Triticum timopheevii accessions, as well as wild T. turgidum from the domesticated emmers and the naked wheats, showing that SNP typing by GBS is capable of providing robust information on the genetic relationships between wheat species and subspecies. The PCAs and a neighbour-joining analysis suggested that domesticated tetraploid wheats have closest affinity with wild emmers from the northern Fertile Crescent, consistent with the results of previous genetic studies on the origins of domesticated wheat. However, a more detailed examination of admixture and allele sharing between domesticates and different wild populations, along with genome-wide association studies (GWAS), showed that the domesticated tetraploid wheats have also received a substantial genetic input from wild emmers from the southern Levant. Taking account of archaeological evidence that tetraploid wheats were first cultivated in the southern Levant, we suggest that a pre-domesticated crop spread from this region to southeast Turkey and became mixed with a wild emmer population from the northern Fertile Crescent. Fixation of the domestication traits in this mixed population would account for the allele sharing and GWAS results that we report. We also propose that feralization of the component of the pre-domesticated population that did not acquire domestication traits has resulted in the modern wild population from southeast Turkey displaying features of both the domesticates and wild emmer from the southern Levant, and hence appearing to be the sole progenitor of domesticated tetraploids when the phylogenetic relationships are studied by methods that assume a treelike pattern of evolution.pt_PT
dc.description.sponsorshipThis work was supported by: TAB, 339941, European Research Council; TAB, NE/M010805/1, Natural Environment Research Councilpt_PT
dc.description.versioninfo:eu-repo/semantics/publishedVersionpt_PT
dc.identifier.doi10.1371/journal.pone.0227148pt_PT
dc.identifier.issn1932-6203
dc.identifier.urihttp://hdl.handle.net/10400.1/13990
dc.language.isoengpt_PT
dc.peerreviewedyespt_PT
dc.publisherPublic Library of Sciencept_PT
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/pt_PT
dc.subjectAllelespt_PT
dc.subjectBase sequencept_PT
dc.subjectGene frequencypt_PT
dc.subjectGenetic locipt_PT
dc.subjectGenomept_PT
dc.subjectGenome-wide association studypt_PT
dc.subjectGenotypept_PT
dc.subjectPhenotypept_PT
dc.subjectPhylogenypt_PT
dc.subjectPolymorphismpt_PT
dc.subjectTriticumpt_PT
dc.subjectTurkeypt_PT
dc.subjectBiological evolutionpt_PT
dc.subjectDomesticationpt_PT
dc.subjectTetraploidypt_PT
dc.subjectPlantpt_PT
dc.titleMultiregional origins of the domesticated tetraploid wheatspt_PT
dc.typejournal article
dspace.entity.typePublication
oaire.citation.issue1pt_PT
oaire.citation.startPagee0227148pt_PT
oaire.citation.titlePLoS ONEpt_PT
oaire.citation.volume15pt_PT
person.familyNameOliveira
person.givenNameHugo
person.identifier.ciencia-id4515-38C3-60F6
person.identifier.orcid0000-0002-5038-073X
person.identifier.scopus-author-id54682168900
rcaap.rightsopenAccesspt_PT
rcaap.typearticlept_PT
relation.isAuthorOfPublication6a71f88f-9429-42f2-8d06-04cd6d1a4eeb
relation.isAuthorOfPublication.latestForDiscovery6a71f88f-9429-42f2-8d06-04cd6d1a4eeb

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