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Resumen
In subtropical environments where sugarcane (Saccharum spp.) crops are frequently limited by the duration of the growth cycle, earliness in maturity is a key genotypic trait. Using the concept of source–sink relationships, we hypothesised that earliness is controlled by the dynamics of tillering (DT), which define sink strength early in the growth cycle. Five modern commercial sugarcane genotypes with similar sucrose yields and varying degrees of [ver mas...]
dc.contributor.authorSaez, Julio Victor
dc.contributor.authorMariotti, Jorge
dc.contributor.authorVega, Claudia Rosa Cecilia
dc.date.accessioned2021-07-23T17:25:50Z
dc.date.available2021-07-23T17:25:50Z
dc.date.issued2019-10
dc.identifier.issn1460-2431
dc.identifier.issn0022-0957
dc.identifier.otherhttps://doi.org/10.1093/jxb/erz251
dc.identifier.urihttp://hdl.handle.net/20.500.12123/9880
dc.identifier.urihttps://academic.oup.com/jxb/article/70/19/5157/5498735
dc.description.abstractIn subtropical environments where sugarcane (Saccharum spp.) crops are frequently limited by the duration of the growth cycle, earliness in maturity is a key genotypic trait. Using the concept of source–sink relationships, we hypothesised that earliness is controlled by the dynamics of tillering (DT), which define sink strength early in the growth cycle. Five modern commercial sugarcane genotypes with similar sucrose yields and varying degrees of earliness in ripening were grown in the field over three years and their DT, dynamics of sucrose accumulation (DS), and source–sink relationships over time were characterised. Canonical correlations and principal components analysis revealed that DT explained 68% of the total variance in DS. Early ripening genotypes exhibited the shortest thermal time to the end of tiller mortality (θTilmort), the lowest tiller survival and millable tiller number, and greatest sugar content at θTilmort (Sconc,Tilmort). The rate and duration of the sucrose accumulation phase did not explain the genotypic variation either in final sugar content or in earliness when considered in isolation without taking into account the effect of Sconc,Tilmort. In the set of genotypes examined, the variation in final sucrose yield was most explained by the variation in stalk number. We conclude that the dynamics of tiller appearance and senescence modified the early source–sink relationships and thus determined the differential sucrose contents around θTilmort and the earliness of maximal sugar accumulation. θTilmort, which was closely associated with the 14-leaf phenological stage, emerged as a candidate trait to screen for genotypic variation in early ripening, crop cycle duration, and yield.eng
dc.formatapplication/pdfes_AR
dc.language.isoenges_AR
dc.publisherOxford University Presses_AR
dc.relationinfo:eu-repograntAgreement/INTA/PNIND-081411/AR./Bases genéticas, moleculares y ecofisiológicas de la productividad y de la resistencia a estrés biótico y abiótico.es_AR
dc.relationinfo:eu-repograntAgreement/INTA/PNIND-1108064/AR./Bases ecofisiológicas del mejoramiento y sistemas de cultivo.es_AR
dc.rightsinfo:eu-repo/semantics/openAccesses_AR
dc.rights.urihttp://creativecommons.org/licenses/by-nc-sa/4.0/
dc.sourceJournal of Experimental Botany 70 (19) : 5157–5171 (October 2019)es_AR
dc.subjectCaña de Azúcares_AR
dc.subjectSugarcaneeng
dc.subjectSaccharumes_AR
dc.subjectRendimientoes_AR
dc.subjectYieldseng
dc.subjectGenotiposes_AR
dc.subjectGenotypeseng
dc.subjectMaduramientoes_AR
dc.subjectRipeningeng
dc.subjectMacollamientoes_AR
dc.subjectTilleringeng
dc.titleSource–sink relationships during early crop development influence earliness of sugar accumulation in sugarcanees_AR
dc.typeinfo:ar-repo/semantics/artículoes_AR
dc.typeinfo:eu-repo/semantics/articlees_AR
dc.typeinfo:eu-repo/semantics/publishedVersiones_AR
dc.rights.licenseCreative Commons Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0)
dc.description.origenEEA Famailláes_AR
dc.description.filFil: Saez, Julio Victor. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Famaillá; Argentinaes_AR
dc.description.filFil: Mariotti, Jorge. Universidad Nacional de Salta. Facultad de Ciencias Naturales. Cátedra de Mejoramiento Genético Vegetal; Argentinaes_AR
dc.description.filFil: Vega, Claudia R.C. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Manfredi. Área de Agronomía; Argentinaes_AR
dc.subtypecientifico


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