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Wheat pre-anthesis development as affected by photoperiod sensitivity genes (Ppd-1) under contrasting photoperiods

dc.contributor.authorPérez-Gianmarco, Thomas I.
dc.contributor.authorSlafer, Gustavo A.
dc.contributor.authorGonzález, Fernanda G.
dc.date.accessioned2019-01-18T13:35:56Z
dc.date.available2019-01-18T13:35:56Z
dc.date.issued2018
dc.identifier.issn1445-4408
dc.identifier.urihttp://hdl.handle.net/10459.1/65563
dc.description.abstractFine tuning wheat phenology is of paramount importance for adaptation. A better understanding of how genetic constitution modulates the developmental responses during pre-anthesis phases would help to maintain or even increase yield potential as temperature increases due to climate change. The photoperiod-sensitive cultivar Paragon, and four near isogenic lines with different combinations of insensitivity alleles (Ppd-A1a, Ppd-B1a, Ppd-D1a or their triple stack) were evaluated under short (12 h) and long (16 h) photoperiods. Insensitivity alleles decreased time to anthesis and duration of the three pre-anthesis phases (vegetative, early reproductive and late reproductive), following the Ppd-D1a > Ppd-A1a > Ppd-B1a ranking of strength. Stacking them intensified the insensitivity, but had no additive effect over that of Ppd-D1a. The late reproductive phase was the most responsive, even exhibiting a qualitative response. Leaf plastochron was not affected but spikelet plastochron increased according to Ppd-1a ranking of strength. Earlier anthesis resulted from less leaves differentiated and a fine tuning effect of accelerated rate of leaf appearance. None of the alleles affected development exclusively during any particular pre-anthesis phase, which would be ideal for tailoring time to anthesis with specific partitioning of developmental time into particular phases. Other allelic variants should be further tested to this purpose.
dc.description.sponsorshipWe thank Simon Griffiths for providing the seeds of the NILs used in the present study within the framework of the EU-FP7 projectADAPTAWHEAT (project number 289842), which also supported the experimental work reported. TI Pérez-Gianmarco held a doctoral fellowship from CONICET (Consejo Nacional de Investigaciones Científicas y Técnicas) and thanks the Crop Physiology Laboratory of the UdL for living allowances while conducting the experiments.
dc.format.mimetypeapplication/pdf
dc.language.isoeng
dc.publisherCSIRO Publishing
dc.relation.isformatofVersió postprint del document publicat a: https://doi.org/10.1071/FP17195
dc.relation.ispartofFunctional Plant Biology, 2018, vol. 45, p. 645-657
dc.rights(c) CSIRO, 2018
dc.subjectFinal leaf number
dc.subjectInsensitivity alleles
dc.subjectOntogenesis
dc.subjectPhenology
dc.titleWheat pre-anthesis development as affected by photoperiod sensitivity genes (Ppd-1) under contrasting photoperiods
dc.typeinfo:eu-repo/semantics/article
dc.date.updated2019-01-18T13:35:57Z
dc.identifier.idgrec028074
dc.type.versioninfo:eu-repo/semantics/acceptedVersion
dc.rights.accessRightsinfo:eu-repo/semantics/openAccess
dc.identifier.doihttps://doi.org/10.1071/FP17195
dc.relation.projectIDinfo:eu-repo/grantAgreement/EC/FP7/289842


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