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New alleles of the wheat domestication gene Q reveal multiple roles in growth and reproductive development

Greenwood, Julian; Finnegan, E. Jean; Watanabe, Nobuyoshi; Trevaskis, Ben; Swain, Steve M

Description

The advantages of free threshing in wheat led to the selection of the domesticated Q allele, which is now present in almost all modern wheat varieties. Q and the pre-domestication allele, q, encode an AP2 transcription factor, with the domesticated allele conferring a free-threshing character and a subcompact (i.e. partially compact) inflorescence (spike). We demonstrate that mutations in the miR172 binding site of the Q gene are sufficient to increase transcript levels via a reduction in...[Show more]

dc.contributor.authorGreenwood, Julian
dc.contributor.authorFinnegan, E. Jean
dc.contributor.authorWatanabe, Nobuyoshi
dc.contributor.authorTrevaskis, Ben
dc.contributor.authorSwain, Steve M
dc.date.accessioned2021-08-18T04:49:15Z
dc.date.available2021-08-18T04:49:15Z
dc.identifier.issn0950-1991
dc.identifier.urihttp://hdl.handle.net/1885/244004
dc.description.abstractThe advantages of free threshing in wheat led to the selection of the domesticated Q allele, which is now present in almost all modern wheat varieties. Q and the pre-domestication allele, q, encode an AP2 transcription factor, with the domesticated allele conferring a free-threshing character and a subcompact (i.e. partially compact) inflorescence (spike). We demonstrate that mutations in the miR172 binding site of the Q gene are sufficient to increase transcript levels via a reduction in miRNA-dependent degradation, consistent with the conclusion that a single nucleotide polymorphism in the miRNA binding site of Q relative to q was essential in defining the modern Q allele. We describe novel gain- and loss-of-function alleles of Q and use these to define new roles for this gene in spike development. Q is required for the suppression of ‘sham ramification’, and increased Q expression can lead to the formation of ectopic florets and spikelets (specialized inflorescence branches that bear florets and grains), resulting in a deviation from the canonical spike and spikelet structures of domesticated wheat.
dc.description.sponsorshipThis work was supported by an Australian National University (ANU) University Research Scholarship and a Commonwealth Scientific and Industrial Research Organisation (CSIRO) OCE PhD Top-up Scholarship
dc.format.mimetypeapplication/pdf
dc.language.isoen_AU
dc.publisherThe Company of Biologists Ltd
dc.rights© 2017. Published by The Company of Biologists Ltd
dc.sourceDevelopment
dc.subjectWheat
dc.subjectSpike
dc.subjectInflorescence
dc.subjectAP2
dc.subjectDomestication
dc.subjectmicroRNA
dc.titleNew alleles of the wheat domestication gene Q reveal multiple roles in growth and reproductive development
dc.typeJournal article
local.description.notesImported from ARIES
local.identifier.citationvolume144
dc.date.issued2017
local.identifier.absfor100105 - Genetically Modified Field Crops and Pasture
local.identifier.ariespublicationa383154xPUB6441
local.publisher.urlhttp://dev.biologists.org/
local.type.statusPublished Version
local.contributor.affiliationGreenwood, Julian, College of Science, ANU
local.contributor.affiliationFinnegan, E. Jean, CSIRO
local.contributor.affiliationWatanabe, Nobuyoshi, Ibaraki University
local.contributor.affiliationTrevaskis , Ben , CSIRO, Division of Plant Industry
local.contributor.affiliationSwain, Steve M , CSIRO Commonwealth Scientific and Industrial Research Organisation Plant Industry
local.bibliographicCitation.issue11
local.bibliographicCitation.startpage1959
local.bibliographicCitation.lastpage1965
local.identifier.doi10.1242/dev.146407
dc.date.updated2020-11-23T10:52:23Z
local.identifier.scopusID2-s2.0-85020111487
local.identifier.thomsonID000402276800007
dcterms.accessRightsOpen Access
dc.provenancehttps://v2.sherpa.ac.uk/id/publication/14668..."The Published Version can be archived in Institutional Repository. 12 months embargo" from SHERPA/RoMEO site (as at 18/08/2021).
CollectionsANU Research Publications

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