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dc.contributor.authorFerrante, Ariel
dc.contributor.authorCartelle Saball, Julia
dc.contributor.authorSavin, Roxana
dc.contributor.authorSlafer, Gustavo A.
dc.date.accessioned2017-01-26T11:43:14Z
dc.date.issued2017
dc.identifier.issn0378-4290
dc.identifier.urihttp://hdl.handle.net/10459.1/59134
dc.description.abstractPhysiological bases of Mediterranean wheat yield improvements have been less explored than in other regions, particularly so during the period following the Green Revolution. Due to the common terminal stress of Mediterranean regions, it could be hypothesized that contemporary cultivars would exhibit improved average grain weight and yield stability compared with a traditional cultivar. Despite the lack of clear evidence in the literature, farmers in Mediterranean regions may prefer growing traditional cultivars over modern ones under the poorest environments and allocate the best lands to more contemporary cultivars. For instance, in our region this has been the case with Anza (a traditional, but semi-dwarf, cultivar) and Soissons (more modern and with a putatively higher potential yield than Anza). We analysed in detail for these two cultivars yield determination and its responsiveness to a very wide range of growing conditions (across six experiments, yield ranging from less than 1 to more than 8 Mg ha−1). Both cultivars responded to the improved yielding conditions noticeably but Soissons did so more strongly, revealing a clearly higher yield potential. The higher yield stability of the traditional cultivar did not imply consistently better performance under the lowest yielding conditions. The main component explaining the yield advantage of the contemporary cultivar was the number of grains per m2 though the traditional cultivar exhibited a sort of partial compensation due to possessing a consistently higher average grain weight. Across all conditions, the overall fruiting efficiency of the contemporary cultivar (111.4 ± 7.5 grains gspike−1) was significantly higher than that of the traditional one (88.3 ± 3.9 grains gspike−1), which was the basis of a higher spike fertility in the contemporary than in the traditional cultivar, observed in most of the spikelets consistently across environmental conditions with a clear trend to increase the number of spikelets exhibiting a significant difference in fertility between the two cultivars and the overall difference in spike fertility between them. Analysing in detail the weight of each individual grain in the last two experiments, we showed that the improved spike fertility due to a higher fruiting efficiency did not bring about reductions in grain weight potential and the dominant cause of the partial compensation was the increase in the proportion of grains in distal positions (constitutively smaller than proximal grains) in the contemporary cultivar.ca_ES
dc.description.sponsorshipWe thank the team of the Crop-Physiology Lab of the UdL for their valuable technical assistance (in particular to Carlos Cortes and Andreu Casellas for all experiments and Diego Liosi for experiments 4–6). Funding was provided by projects AGL2003-06978 and AGL2009-11964 granted by the Spanish Ministry of Science and Innovation. JC held a FPI and AF a FPU scholarship from the Spanish Government.ca_ES
dc.language.isoengca_ES
dc.publisherElsevierca_ES
dc.relationMICYT/PN2000-2003/AGL2003-06978
dc.relationMICINN/PN2008-2011/AGL2009-11964
dc.relation.isformatofReproducció del document publicat a https://doi.org/10.1016/j.fcr.2016.12.028ca_ES
dc.relation.ispartofField Crops Research, 2017, vol. 203, p. 114–127ca_ES
dc.rights(c) Elsevier B.V., 2016ca_ES
dc.subjectNitrogenca_ES
dc.subjectIrrigationca_ES
dc.subjectPhotoperiodca_ES
dc.subjectSinkca_ES
dc.subjectTriticum aestivumca_ES
dc.titleYield determination, interplay between major components and yield stability in a traditional and a contemporary wheat across a wide range of environmentsca_ES
dc.typearticleca_ES
dc.identifier.idgrec025201
dc.type.versionpublishedVersionca_ES
dc.rights.accessRightsinfo:eu-repo/semantics/restrictedAccessca_ES
dc.identifier.doihttps://doi.org/10.1016/j.fcr.2016.12.028
dc.date.embargoEndDate2025-01-01


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