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dc.contributor.authorFerrante, Ariel
dc.contributor.authorSavin, Roxana
dc.contributor.authorSlafer, Gustavo A.
dc.date.accessioned2017-01-11T09:14:56Z
dc.date.available2017-01-11T09:14:56Z
dc.date.issued2013
dc.identifier.issn0022-0957
dc.identifier.urihttp://hdl.handle.net/10459.1/58931
dc.description.abstractWheat yield depends on the number of grains per square metre, which in turn is related to the number of fertile florets at anthesis. The dynamics of floret generation/degeneration were studied in contrasting conditions of nitrogen (N) and water availability of modern, well-adapted, durum wheats in order to understand further the bases for grain number determination. Experiments were carried out during the 2008-2009 and 2009-2010 growing seasons at Lleida (NE Spain). The first experiment involved four cultivars (Claudio, Donduro, Simeto, and Vitron) and two contrasting N availabilities (50 kgN ha(-1) and 250 kgN ha(-1); N50 and N250) while experiment 2 included the two cultivars most contrasting in grain setting responsiveness to N in experiment 1, and two levels of N (N50 and N250), under irrigated (IR) and rainfed (RF) conditions. In addition, a detillering treatment was imposed on both cultivars under the IR+N250 condition. The number of fertile florets at anthesis was increased by ~30% in response to N fertilization (averaging across treatments and spikelet positions). The effect of N and water availability was evident on floret developmental rates from the third floret primordium onwards, as these florets in the central spikelets of all genotypes reached the stage of a fertile floret in N250 while in N50 they did not. In this study, clear differences were found between the cultivars in their responsiveness to N by producing more fertile florets at anthesis (through accelerating developmental rates of floret primordia), by increasing the likelihood of particular grains to be set, or by both traits.ca_ES
dc.description.sponsorshipWe thank the team of the crop physiology laboratory of the UdL for technical assistance. Funding was provided by the Spanish Ministry of Science and Innovation through project AGL2009- 11964. AF held a FPU, AP2006-03719, scholarship from the Spanish Ministry of Education.ca_ES
dc.language.isoengca_ES
dc.publisherOxford University Pressca_ES
dc.relationMICINN/PN2008-2011/AGL2009-11964ca_ES
dc.relation.isformatofReproducció del document publicat a https://doi.org/10.1093/jxb/ers320ca_ES
dc.relation.ispartofJournal of Experimental Botany, 2013, vol. 64, p. 169-184ca_ES
dc.rightscc-by-nc (c) Savin et al., 2012ca_ES
dc.rights.urihttp://creativecommons.org/licenses/by-nc/3.0/es/*
dc.subjectDetilleringca_ES
dc.subjectFertile floretca_ES
dc.subjectFloret primordiaca_ES
dc.titleFloret development and grain setting differences between modern durum wheats under contrasting nitrogen availabilityca_ES
dc.typearticleca_ES
dc.identifier.idgrec018782
dc.type.versionpublishedVersionca_ES
dc.rights.accessRightsinfo:eu-repo/semantics/openAccessca_ES
dc.identifier.doihttps://doi.org/10.1093/jxb/ers320


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cc-by-nc (c) Savin et al., 2012
Except where otherwise noted, this item's license is described as cc-by-nc (c) Savin et al., 2012