Assessment of agro-physiological traits for identifying drought-tolerant durum wheat (Triticum durum Desf.) genotypes under rainfed conditions
Evaluación de rasgos agrofisiológicos para la identificación de genotipos de trigo duro (Triticum durum Desf.) tolerantes a la sequía en condiciones de secano
DOI:
https://doi.org/10.15446/rfnam.v77n2.108152Palabras clave:
Grain yield, Genotype, Semi-arid, Water, Performance (en)Rendimiento de grano, Genotipo, Semiárido, Agua, Desempeño (es)
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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.
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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