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Thermal imaging reliability for estimating grain yield and carbon isotope discrimination in wheat genotypes: Importance of the environmental conditions

dc.contributor.authorRomero-Bravo, Sebastián
dc.contributor.authorMéndez-Espinoza, Ana María
dc.contributor.authorGarriga, Miguel
dc.contributor.authorEstrada, Félix
dc.contributor.authorEscobar-Opazo, Alejandro
dc.contributor.authorGonzález-Martínez, Luis
dc.contributor.authorPoblete-Echeverría, Carlos
dc.contributor.authorSepúlveda, Daniel
dc.contributor.authorMatus, Iván A.
dc.contributor.authorCastillo, Dalma
dc.contributor.authorDel Pozo, Alejandro
dc.contributor.authorLobos, Gustavo A.
dc.date.accessioned2019-12-12T14:54:53Z
dc.date.available2019-12-12T14:54:53Z
dc.date.issued2019
dc.identifier.urihttp://repositorio.ucm.cl/handle/ucm/2525
dc.description.abstractCanopy temperature (Tc) by thermal imaging is a useful tool to study plant water status and estimate other crop traits. This work seeks to estimate grain yield (GY) and carbon discrimination (Δ13C) from stress degree day (SDD = Tc − air temperature, Ta), considering the effect of a number of environmental variables such as the averages of the maximum vapor pressure deficit (VPDmax) and the ambient temperature (Tmax), and the soil water content (SWC). For this, a set of 384 and a subset of 16 genotypes of spring bread wheat were evaluated in two Mediterranean-climate sites under water stress (WS) and full irrigation (FI) conditions, in 2011 and 2012, and 2014 and 2015, respectively. The relationship between the GY of the 384 wheat genotypes and SDD was negative and highly significant in 2011 (r2 = 0.52 to 0.68), but not significant in 2012 (r2 = 0.03 to 0.12). Under WS, the average GY, Δ13C, and SDD of wheat genotypes growing in ten environments were more associated with changes in VPDmax and Tmax than with the SWC. Therefore, the amount of water available to the plant is not enough information to assume that a particular genotype is experiencing a stress condition.es_CL
dc.language.isoenes_CL
dc.rightsAtribución-NoComercial-SinDerivadas 3.0 Chile*
dc.rights.urihttp://creativecommons.org/licenses/by-nc-nd/3.0/cl/*
dc.sourceSensors, 19(12), 2676es_CL
dc.subjectRemote sensinges_CL
dc.subjectPhenotypees_CL
dc.subjectPhenotypinges_CL
dc.subjectPhenomicses_CL
dc.subjectTriticum aestivumes_CL
dc.subjectWater deficites_CL
dc.subjectStresses_CL
dc.titleThermal imaging reliability for estimating grain yield and carbon isotope discrimination in wheat genotypes: Importance of the environmental conditionses_CL
dc.typeArticlees_CL
dc.ucm.facultadFacultad de Ciencias Agrarias y Forestaleses_CL
dc.ucm.indexacionScopuses_CL
dc.ucm.indexacionIsies_CL
dc.ucm.doidoi.org/10.3390/s19122676es_CL


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