| dc.contributor.author | Pérez-Gianmarco, Thomas I. | |
| dc.contributor.author | Slafer, Gustavo A. | |
| dc.contributor.author | González, Fernanda G. | |
| dc.date.accessioned | 2019-01-18T13:35:56Z | |
| dc.date.available | 2019-01-18T13:35:56Z | |
| dc.date.issued | 2018 | |
| dc.identifier.issn | 1445-4408 | |
| dc.identifier.uri | http://hdl.handle.net/10459.1/65563 | |
| dc.description.abstract | Fine 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.sponsorship | We 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.mimetype | application/pdf | |
| dc.language.iso | eng | |
| dc.publisher | CSIRO Publishing | |
| dc.relation.isformatof | Versió postprint del document publicat a: https://doi.org/10.1071/FP17195 | |
| dc.relation.ispartof | Functional Plant Biology, 2018, vol. 45, p. 645-657 | |
| dc.rights | (c) CSIRO, 2018 | |
| dc.subject | Final leaf number | |
| dc.subject | Insensitivity alleles | |
| dc.subject | Ontogenesis | |
| dc.subject | Phenology | |
| dc.title | Wheat pre-anthesis development as affected by photoperiod sensitivity genes (Ppd-1) under contrasting photoperiods | |
| dc.type | info:eu-repo/semantics/article | |
| dc.date.updated | 2019-01-18T13:35:57Z | |
| dc.identifier.idgrec | 028074 | |
| dc.type.version | info:eu-repo/semantics/acceptedVersion | |
| dc.rights.accessRights | info:eu-repo/semantics/openAccess | |
| dc.identifier.doi | https://doi.org/10.1071/FP17195 | |
| dc.relation.projectID | info:eu-repo/grantAgreement/EC/FP7/289842 | |
