Yield stability of durum wheat varieties under organic and conventional farming
Estabilidad del rendimiento de variedades de trigo duro bajo agricultura orgánica y convencional
DOI:
https://doi.org/10.15446/rfnam.v79.124472Keywords:
Cultivar evaluation, Durum wheat, Genotype × environment interaction, Grain yield stability, Sustainable agriculture (en)Evaluación de cultivares, Trigo duro, Interacción genotipo × ambiente, Estabilidad del rendimiento de grano, Agricultura sostenible (es)
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This study aims to identify the most suitable and stable durum wheat (Triticum durum Desf.) varieties for organic farming. Thirteen varieties (four traditional and nine improved) were evaluated over three consecutive years (2022–2024) in two contrasting environments (Beja, sub-humid, and Bousselem, semi-arid) under two cropping systems (organic and conventional). Grain yield stability was assessed using complementary stability indices to evaluate genotype performance, adaptation, and yield stability across environments. The varieties "Dhahbi", "Khiar", "Biskri", "INRAT100", "Maali", and "Monastir" showed good yield potential under organic conditions, reaching between 2,600 and 2,900 kg ha⁻¹. However, only "INRAT100" and "Monastir" stood out for their remarkable stability, with a bᵢ close to 1, low variability (CV of 17.48 and 2.31%), and low ecovalence values according to Wricke and Shukla. These results were confirmed by the Plaisted and Peterson, Lin and Binns, and GAI indices, highlighting the complementarity of these stability indices for identifying high-performing and stable genotypes. Therefore, "INRAT100" and "Monastir" appear to be the most promising, best-adapted, and most stable genotypes for organic durum wheat cultivation, providing valuable candidates for cultivar recommendation and supporting sustainable durum wheat production in Tunisia.
Este estudio tiene como objetivo identificar las variedades de trigo duro (Triticum durum Desf.) más adecuadas y estables para la agricultura ecológica. Trece variedades (cuatro tradicionales y nueve mejoradas) fueron evaluadas durante tres años consecutivos (2022–2024) en dos ambientes contrastantes (Beja, subhúmedo, y Bousselem, semiárido) bajo dos sistemas de cultivo (ecológico y convencional). La estabilidad del rendimiento de grano se evaluó mediante índices de estabilidad complementarios para analizar el comportamiento de los genotipos, su adaptación y la estabilidad del rendimiento en diferentes ambientes. Las variedades "Dhahbi", "Khiar", "Biskri", "INRAT100", "Maali" y "Monastir" mostraron un buen potencial de rendimiento bajo condiciones ecológicas, alcanzando valores entre 2.600 y 2.900 kg ha⁻¹. Sin embargo, únicamente "INRAT100" y "Monastir" destacaron por su notable estabilidad, con un coeficiente de regresión (bᵢ) cercano a 1, una baja variabilidad (CV de 17,48 y 2,31%, respectivamente) y bajos valores de ecovalencia según Wricke y Shukla. Estos resultados fueron confirmados por los índices de Plaisted y Peterson, Lin y Binns, y GAI, destacando la complementariedad de estos índices de estabilidad para identificar genotipos de alto rendimiento y estabilidad. Por lo tanto, "INRAT100" y "Monastir" parecen ser los genotipos más prometedores, mejor adaptados y más estables para el cultivo ecológico de trigo duro, proporcionando candidatos valiosos para la recomendación varietal y contribuyendo al desarrollo de una producción sostenible de trigo duro en Túnez.
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