Physiological traits associated with wheat yield potential and performance under water-stress in a mediterranean environment

Yañez-Alegría, Alejandra; Del Pozo, Alejandro; Matus, Iván A.; Tapia, Gerardo; Castillo, Dalma; Sanchez-Jardón, Laura; Araus, José L.

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dc.contributor.author	Yañez-Alegría, Alejandra
dc.contributor.author	Del Pozo, Alejandro
dc.contributor.author	Matus, Iván A.
dc.contributor.author	Tapia, Gerardo
dc.contributor.author	Castillo, Dalma
dc.contributor.author	Sanchez-Jardón, Laura
dc.contributor.author	Araus, José L.
dc.date.accessioned	2017-10-04T15:58:18Z
dc.date.available	2017-10-04T15:58:18Z
dc.date.issued	2016
dc.identifier.uri	http://repositorio.ucm.cl/handle/ucm/340
dc.description.abstract	Different physiological traits have been proposed as key traits associated with yield potential as well as performance under water stress. The aim of this paper is to examine the genotypic variability of leaf chlorophyll, stem water-soluble carbohydrate content and carbon isotope discrimination (Δ13C), and their relationship with grain yield (GY) and other agronomical traits, under contrasting water conditions in a Mediterranean environment. The study was performed on a large collection of 384 wheat genotypes grown under water stress (WS, rainfed), mild water stress (MWS, deficit irrigation), and full irrigation (FI). The average GY of two growing seasons was 2.4, 4.8, and 8.9 Mg ha−1 under WS, MWS, and FI, respectively. Chlorophyll content at anthesis was positively correlated with GY (except under FI in 2011) and the agronomical components kernels per spike (KS) and thousand kernel weight (TKW). The WSC content at anthesis (WSCCa) was negatively correlated with spikes per square meter (SM2), but positively correlated with KS and TKW under WS and FI conditions. As a consequence, the relationships between WSCCa with GY were low or not significant. Therefore, selecting for high stem WSC would not necessary lead to genotypes of GY potential. The relationship between Δ13C and GY was positive under FI and MWS but negative under severe WS (in 2011), indicating higher water use under yield potential and MWS conditions.	es_CL
dc.language.iso	en	es_CL
dc.rights	Atribución-NoComercial-SinDerivadas 3.0 Chile	*
dc.rights.uri	http://creativecommons.org/licenses/by-nc-nd/3.0/cl/	*
dc.source	Frontiers in Plant Science, 7, 987	es_CL
dc.subject	Carbohydrate	es_CL
dc.subject	Carbon isotope discrimination	es_CL
dc.subject	Chlorophyll	es_CL
dc.subject	Drought	es_CL
dc.subject	Stem reserves	es_CL
dc.title	Physiological traits associated with wheat yield potential and performance under water-stress in a mediterranean environment	es_CL
dc.type	Article	es_CL
dc.ucm.facultad	Facultad de Ciencias Agrarias y Forestales	es_CL
dc.ucm.indexacion	Scopus	es_CL
dc.ucm.indexacion	Isi	es_CL
dc.ucm.doi	doi.org/10.3389/fpls.2016.00987	es_CL