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To G X E interactions as predictable and unpredictable. (Francis et al., 1978a, b Beaver at al., 1985 Kelly et al.,Īllard and Bardshaw (1964) have categorised environmental factors which lead Used in comparing and measuring genotypic performances of common bean cultivars Proposed by Yates and Cochran (1938) and later modified by Finlay and Wilkinson Interest has been focused on the regression analysis, an approach originally Magnitude, but give no measurements of the individual genotypes with theĮnvironment, and therefore no measurements of stability of individual cultivars. Of the estimates, however, only provide information on their existence and Interactions (Hanson et al., 1956 Comstock and Moll, 1963). Of resources for cultivar testing (Rasmusson and Lambert, 1961).ĭifferent attempts have been made to solve the problems created by G X E Of years, locations and replications, to determine the most efficient allocation Knowledge of the size of the variance componentsĪssociated with G X E interactions can be used in conjunction with combination Improves the probability of detecting significant differences among cultivars Decreasing the variances of a cultivar mean With available resources, the goal of cultivar testing is to minimise the (1968) indicated that in the quantitative genetic sense and in accordance That are possible, within the limitations imposed by time and costs. Traits that enable us obtain the most accurate estimates of cultivar performance Mots Clés: Adaptation, Phaseolus vulgaris, coéfficient de régression,Ĭultivar testing programmes generate phenotypic data for seed yield and other Les autres épreuves des génotypes étaient sensibles aux facteurs limitant la production, leur large adaptabilité, stabilité et performance générale aux fluctuantes conditions de croissance dans et à travers les sites étant diminuées.
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Deux génotypes, G 17450 et PAN 134 avec des coéfficients de régression de valeurs respectives 1,04 et 1,09, les petites valeurs de Sd2, et un haut rendement en graine relatif pourraient être considérés comme les génotypes les plus largement adaptés. L'importance de la proportion linéaire a demontré le caractère adéquat du modèle de régression dans la description de la stabilité des génotypes de haricots. L'intéraction génotype x environnement était présente et la plus élévée était la composante linéaire. Il y avait une variation considérable en rendement en graine dans et à travers les environnements.
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Les intéractions génotype x environnement (GXE) étaient analysées en utilisant une régression linéaire. Seize génotypes étaient germés dans un block completement au hasard avec trois réproductions en quatre endroits en Ethiopie. Les intéractions génotype et environnement, la réponse du génotype aux environnements et la stabilité du rendement en graine des génotypesĭe haricots commun ( Phaseolus vulgaris L.) étaient étudiés. Key Words: Adaptation, Phaseolus vulgaris, regression coefficient, The other test genotypes were sensitive to production-limiting factors, their wider adaptability, stability and general performance to the fluctuating growing conditions within and across sites being lowered. Two genotypes, G 17450 and PAN 134 with respective regression coefficient values of 1.04 and 1.09, smaller S 2d values, and a relatively high seed yield could be considered the most widely adapted genotypes. The significance of the linear proportion demonstrated the adequacy of the regression model in describing the stability of the bean genotypes. Genotype x environment interaction was present, the highest being the linear component. There was considerable variation in seed yield within and across environments. Genotype x environment (G X E) interactions were analysed using linear regression. Sixteen genotypes were grown in a randomised complete block design with three replications at four locations in Ethiopia. Genotype x environment interactions, genotype response to environments and stability for seed yield of navy bean genotypes ( Phaseolus vulgaris L.) were studied. National Lowland Pulse Research Program, Melkassa Agricultural Research Center,
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Genotype X Environment Interaction and Stability Analysis of Seed Yield in Navy Bean Genotypes Bioline International Official Site (site up-dated regularly)Īfrican Crop Science Journal African Crop Science Society ISSN: 1021-9730 Vol.
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