Genotypic differences in wheat yield determinants within a NAM population based on elite parents

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dc.contributor.authorBasavaraddi, Priyanka A.
dc.contributor.authorSavin, Roxana
dc.contributor.authorSukumaran, Sivakumar
dc.contributor.authorReynolds, Matthew P.
dc.contributor.authorGriffiths, Simon
dc.contributor.authorSlafer, Gustavo A.
dc.date.accessioned2021-01-08T08:42:21Z
dc.date.available2022-12-25T23:07:50Z
dc.date.issued2020-12-25
dc.date.updated2021-01-08T08:42:21Z
dc.description.abstractFuture grain yield (GY) improvements require the identification of beneficial traits within the context of high yield potential and not just based on the pleiotropic effect of traits such as crop height and heading date. We evaluated 1937 lines from Nested Association Mapping (NAM) population derived from 13 bi-parental varietal crosses under field conditions. We selected 493 lines with similar time to anthesis to that of the two checks used in the study (across and within each family) which reduced the range of plant height in the selected lines. Yield components were measured in these 493 lines from which 231 lines were selected by excluding lines with lowest number of grains so excluded low yielding lines. Later the subset of 231 lines were evaluated in two field experiments (2016−17, CS1 and 2017−18, CS2). Numerical and physiological components of grain yield were measured. The two-step selection maximised GY within an acceptable range of variation for height and anthesis. GY in 231 lines showed very high G × E interaction. Taking both seasons together, we selected lines from upper and lower quartile GY groups to identify stable beneficial trait combinations for improved GY. Differences in GY were explained by grain number driven by increased spike dry weight at anthesis (SDWa) and fruiting efficiency (FE). Increased GY was accompanied by sink limitation. The data points towards increases in grain number as the route towards future GY increases in wheat breeding.
dc.description.sponsorshipFunding for the experimental work was partly provided by projects AGL2015-69595-R, from the Spanish Research Agency (AEI), and IWYP25FP, from the International Wheat Yield Partnership (IWYP). PB held a pre-doctoral research contract from the agency for Management of University and Research (AGAUR) from the Generalitat de Catalunya.
dc.format.mimetypeapplication/pdf
dc.identifier.doihttps://doi.org/10.1016/j.eja.2020.126223
dc.identifier.idgrec030744
dc.identifier.issn1161-0301
dc.identifier.urihttp://hdl.handle.net/10459.1/70162
dc.language.isoeng
dc.publisherElsevier
dc.relationinfo:eu-repo/grantAgreement/MINECO//AGL2015-69595-R/ES/VARIABILIDAD GENOTIPICA EN ATRIBUTOS DETERMINANTES DEL NUMERO DE GRANOS Y POSIBLES COMPENSACIONES CON EL PESO Y CALIDAD NUTRICIONAL DE LOS GRANOS EN MATERIAL ELITE DE TRIGO/
dc.relation.isformatofVersió postprint del document publicat a: https://doi.org/10.1016/j.eja.2020.126223
dc.relation.ispartofEuropean Journal of Agronomy, 2021, vol. 123, p. 126223
dc.rightscc-by-nc-nd, (c) Elsevier, 2020
dc.rights.accessRightsinfo:eu-repo/semantics/openAccess
dc.rights.urihttp://creativecommons.org/licenses/by-nc-nd/3.0/es
dc.subjectPre-anthesis phases
dc.subjectFruiting efficiency
dc.subjectSpike dry weight at anthesis
dc.subjectSource-Sink
dc.subjectYield components
dc.titleGenotypic differences in wheat yield determinants within a NAM population based on elite parents
dc.typeinfo:eu-repo/semantics/article
dc.type.versioninfo:eu-repo/semantics/acceptedVersion
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