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      Assessment of agro-physiological traits for identifying drought-tolerant durum wheat (Triticum durum Desf.) genotypes under rainfed conditions Translated title: Evaluación de rasgos agrofisiológicos para la identificación de genotipos de trigo duro (Triticum durum Desf.) tolerantes a la sequía en condiciones de secano

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          Abstract

          ABSTRACT Breeders are focused on developing high-yielding genotypes that can grow in semi-arid regions under water stress. A field experiment was conducted during the 2020 to 2021 cropping season at the experimental field of ITGC, Setif. The aim of this study was to assess the performance of durum wheat genotypes for agronomic traits growing under semi-arid conditions. The 10 genotypes evaluated were grown in a randomized block with three replications. Analysis of variance showed that the genotype effect was significant for most parameters studied. The best grain yield was recorded for genotypes G3 (3.52 t ha-1) G2 (3.48 t ha-1), and G5 (2.89 t ha-1); thus, they maintained the highest water content (81.09, 84.95, and 84.34%, respectively) and lower temperatures under these conditions. Simple linear regression showed that grain yield correlated positively with the number of spikes, and the number of grains per spike. The principal component (PC) analysis classified both genotypes G2 and G3 as high grain-yielding genotypes; by contrast, genotypes Jupare C 2001, Bouatleb, and G1 were low-yielding.

          Translated abstract

          RESUMEN Los mejoradores se centran en desarrollar genotipos de alto rendimiento que puedan crecer en regiones semiáridas sometidas a estrés hídrico. Se realizó un experimento de campo durante la temporada agrícola de 2020 a 2021 en el campo experimental del ITGC, Sétif. El objetivo de este estudio fue evaluar el desempeño de los genotipos de trigo duro en cuanto a características agronómicas en condiciones semiáridas. Los 10 genotipos evaluados fueron cultivados en bloques al azar con tres repeticiones. El análisis de varianza mostró que el efecto del genotipo fue significativo para la mayoría de los parámetros estudiados. El mejor rendimiento de grano se registró para los genotipos G3 (3,52 t ha-1), G2 (3,48 t ha-1) y G5 (2,89 t ha-1); así mantuvieron el mayor contenido de agua (81,09; 84,95 y 84,34%, respectivamente) y temperaturas más bajas en estas condiciones. La regresión lineal simple mostró que el rendimiento de grano se correlacionaba positivamente con el número de espigas y el número de granos por espiga. El análisis de componentes principales (PC) clasificó ambos genotipos G2 y G3 como genotipos de alto rendimiento de grano; por el contrario, los genotipos Jupare C 2001, Bouatleb y G1 fueron de bajo rendimiento.

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          Drought stress amelioration in wheat through inoculation with Burkholderia phytofirmans strain PsJN

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            Phenotypic and genetic analysis of spike and kernel characteristics in wheat reveals long-term genetic trends of grain yield components

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              Water deficit effects on solute contribution to osmotic adjustment as a function of leaf ageing in three durum wheat (Triticum durum Desf.) cultivars performing differently in arid conditions.

              A greenhouse study was carried out using three durum wheat (Triticum durum Desf.) cultivars differing in their field performances under arid conditions (Kabir 1, poor yield stability; Omrabi 5, high yield stability and Haurani, landrace well adapted to drought). Water stress was imposed by withholding water at the seedling stage. Water potential (Psi(w)), relative water content (RWC), stomatal resistance (SR), and changes in solute concentrations were quantified: (1) as a function of leaf development during the stress period; and (2) in young expanded and growing leaves harvested at the end of the stress treatment. Psi(w), RWC and SR were almost unaffected by leaf age in controls. In contrast, solute concentrations appeared to vary in the course of leaf development. During the stress treatment, Psi(w) and RWC decreased and SR increased in all cultivars; the changes were most often largest in Omrabi 5, lowest in Haurani and intermediate in Kabir 1. Water stress also increased sugar and proline concentrations and decreased nitrate levels. Young expanded and growing leaves differed in terms of Psi(w), RWC and osmotic adjustment (OA). The capacity of OA was greater in growing than in expanded leaves, especially in the two cultivars best adapted to aridity, and allowed turgor maintenance in these genotypes. Sugars were the main solutes that contributed to OA particularly in growing leaves followed by proline and then quaternary ammonium compounds. The contributions of these organic solutes to OA tended to be higher in Omrabi 5 and in Haurani than in Kabir 1. Inorganic solutes, however, did not seem to play an important role in OA despite their high proportion in total solutes.
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                Author and article information

                Journal
                rfnam
                Revista Facultad Nacional de Agronomía Medellín
                Rev. Fac. Nac. Agron. Medellín
                Facultad de Ciencias Agrarias - Universidad Nacional de Colombia (Medellín, Antioquia, Colombia )
                0304-2847
                2248-7026
                August 2024
                : 77
                : 2
                : 10717-10727
                Affiliations
                [1] orgnameFarhat Abbas University of setif, orgdiv1faculty of Nature and Life Sciences orgdiv2Department of Agronomy Algeria Sarahbenkadja8@ 123456gmail.com
                [2] orgnameFarhat Abbas University of setif orgdiv1faculty of Nature and Life Sciences orgdiv2Department of Biology and Plant ecology Algeria oulmi@ 123456yahoo.fr
                [3] orgnameNational Institute of Agronomic Research of Algeria orgdiv1Research Unit of Setif Algeria guendouz.ali@ 123456gmail.com
                Author information
                https://orcid.org/0000-0001-7737-6135
                https://orcid.org/0000-0002-1716-711X
                https://orcid.org/0000-0002-9081-6497
                https://orcid.org/0000-0001-6463-7340
                Article
                S0304-28472024000210717 S0304-2847(24)07700210717
                10.15446/rfnam.v77n2.108152
                9a78b017-0234-42a9-9a75-78e4c83ae939

                This work is licensed under a Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International License.

                History
                : 17 January 2024
                : 20 February 2024
                Page count
                Figures: 0, Tables: 0, Equations: 0, References: 66, Pages: 11
                Product

                SciELO Colombia

                Categories
                Articles

                Water,Rendimiento de grano,Genotipo,Semiárido,Agua,Desempeño,Grain yield,Genotype,Semi-arid,Performance

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