Trait associations in common bean genotypes grown under drought stress and field infestation by BSM bean fly

Ambachew, Daniel; Mekbib, Firew; Asfaw, Asrat; Beebe, Stephen E.; Blair, Matthew W.

doi:10.1016/j.cj.2015.01.006

Cited by 64 publications

(62 citation statements)

References 25 publications

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“…In agreement with this finding, high heritability and high genetic advance estimates were recorded for the two traits ( Table 2). Ambachew et al [15] established a negative and low correlation between branches per plant and yield per plant and contradicts our findings for the two traits. Such negative relationships with the grain yield indicate that basing selection on the two traits may not bring the desired improvement in grain yield.…”

Section: Discussioncontrasting

confidence: 99%

“…is agrees with Abebe et al [13], Negash [14], and Ambachew et al [15] whose findings showed that the contribution of the genetic effects outweighs the environmental effects for all traits in the estimation of phenotypic variance. In this study, the highest estimates for the genotypic and phenotypic coefficient of variation under water stress condition were recorded for the number of pods per plant and yield per plant, indicating that one of the most effective ways to increase grain yield under drought stress is to increase the number of pods.…”

Section: Discussionsupporting

confidence: 91%

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Genetic Variability of Agronomic Traits as Potential Indicators of Drought Tolerance in Common Beans (Phaseolus vulgaris L.)

Langat

Ombori

Leley

et al. 2019

International Journal of Agronomy

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Sixteen progeny lines of common beans obtained from single crosses made between two parents, GLP2 and KAT B1, were grown in randomized complete block design in a rainout shelter at the Agricultural and Mechanization Research Institute, Machakos, Kenya. e experiment was conducted to study inheritance of traits associated with drought stress adaptation and to establish if significant variation for those traits was existing in order to carry out selection for drought tolerance. e calculated mean values were used to estimate heritability, genetic advance, and correlation study for each trait. Water stress had a significant (p ≤ 0.01) effect on the number of pods per plant, grains per plant, 100-seed weight, and yield per plant. e highest values for genotypic coefficient of variation (36.11%) and phenotypic coefficient of variation (36.70%) were recorded for pods plant -1 under stress condition. Highest broad-sense heritability estimates (96.54%, 94.97%, and 93.16%) coupled with high genetic advance as percent of the mean (22.32%, 34.97%, and 26.32%) were obtained for the number of pods plant − 1 , days to maturity, and yield plant − 1 , respectively, showing that selection of these traits together could lead to yield improvement under stressed conditions. Harvest index showed a significant and positive relationship with biomass aboveground (r � 0.86) and the number of pods plant − 1 (r � 0.86) indicating the possibility of identifying high performing lines of common beans for drought stress environment for further studies on these traits.

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Section: Discussioncontrasting

confidence: 99%

Section: Discussionsupporting

confidence: 91%

Genetic Variability of Agronomic Traits as Potential Indicators of Drought Tolerance in Common Beans (Phaseolus vulgaris L.)

Langat

Ombori

Leley

et al. 2019

International Journal of Agronomy

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“…These crop improvements require a better understanding of the dynamics of the drought tolerance mechanisms functioning during the exposure of common bean to differential water availability and their relative contributions to stabilized or increased seed yield (Ambachew et al, 2015). Improved seed yield under variable stress factors is the result of not only a single trait but rather a cumulative function of many interdependent plant traits (Asfaw et al, 2012).…”

Section: Introductionmentioning

confidence: 99%

Trait Associations in Diversity Panels of the Two Common Bean (Phaseolus vulgaris L.) Gene Pools Grown under Well-watered and Water-Stress Conditions

et al. 2017

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Common beans are a warm-season, food legume cultivated in areas prone to water limitation throughout their growing season. This study assessed the magnitude and pattern of trait associations for a total of 202 common bean genotypes divided into panels of 81 Andean and 121 Mesoamerican gene pool accessions grown under contrasting treatments of well-watered, non-stress, and water-limited, terminal drought-stress conditions. Linear correlation, complex path coefficient, and genetic divergence analyses were used to dissect the relationship dynamics between traits and the relative contribution of adaptive traits to differentiation among gene pools and genotypes based on drought stress. Drought severity level for the trial was high and created the ideal condition to reveal genotypic differences, as seen by the differential response of the genotypes for the various traits measured. The value for phenotypic coefficients of variation for all traits was higher than the corresponding genotypic values. Seed yield had positive and strong genotypic and phenotypic correlation with pods per plant across gene pools and stress levels. The overall amount of genetic correlation was greater than the corresponding phenotypic correlation matrix for all the traits within the gene pool and across stress levels. Moreover, the results depicted the phenotypic correlation as equal or better than its genotypic counterpart in estimating drought tolerance in common bean plants. Clustering analysis with Mahanalobis's coefficient of generalized distance grouped genotypes with a differential level of drought adaptation into different classes within each panel. This indicates drought tolerance involves different mechanisms of plant response and is present separately in each gene pool panel. Pods per plant, seed weight, pod partitioning index, and harvest index are useful selection objectives to improve drought adaptation in common bean, but must be differentially weighted in each gene pool. The analysis of genetic variation and association between adaptive traits on the two panels provided useful insights on which traits could be used to improve common bean adaptation to low water availability during the growth season.

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“…En México 80% de la superficie sembrada de frijol se encuentran bajo el régimen de temporal, por lo tanto, en sistemas de producción para autoconsumo y comerciales la sequía es un fenómeno meteorológico que provoca pérdida parcial o total de las cosechas (Ambachew et al, 2015). Aunque cualquier etapa del ciclo de cultivo puede ser afectada por la sequía, la germinación es una de las etapas más importantes en la vida de las plantas, ya que determina el uso eficiente de los nutrientes y los recursos hídricos disponibles de éstas (Aguilar et al, 2014), por lo que las variedades con mayor germinación en condiciones de restricción de humedad deben recibir especial importancia.…”

Section: Introductionunclassified

Germinación de cultivares de frijol con características físicas contrastantes bajo condiciones de estrés osmótico

Benítez

Díaz

Rivera

et al. 2019

Remexca

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El cultivo de frijol común (Phaseolus vulgaris L.) en México ocupa el tercer lugar por superficie establecida, aunque la producción reporta variaciones anuales por la heterogeneidad de condiciones climáticas en las que se produce. Dada la importancia cultural y alimenticia de esta leguminosa, los agricultores y genetistas han seleccionado cultivares con características culinarias deseables y adaptaciones a ambientes restrictivos. El objetivo fue caracterizar la germinación de cultivares de frijol recolectados en Valles Centrales de Oaxaca y el Altiplano Potosino, regiones con ambientes y cultura contrastantes. En el laboratorio de Fitoquímica del Instituto de Investigación de Zonas Desérticas, durante el verano de 2015 se evaluaron cinco cultivares tradicionales y diez cultivares mejorados de frijol. Se cuantificó el porcentaje de germinación con los procedimientos de la prueba estándar descrita por ISTA (2005) y se seleccionaron las semillas que mostraron menor incidencia de contaminación por hongos y mayor porcentaje de germinación. Con cuatro cultivares mejorados y cuatro cultivares tradicionales se determinó el peso promedio de una muestra de 100 semillas y la proporción de estructuras seminales. También se registró el efecto de tres potenciales osmóticos en la germinación (Ψo: 0, -0.5 y -1.1MPa). Se observaron diferencias (p≤ 0.05) en el peso de 100 semillas, el porcentaje de la testa y eje embrionario. En Ψo: 0.0 Mpa y -0.5 Mpa se obtuvieron diferencias (p≤ 0.05) entre los cultivares evaluados. En Ψo: -1.1 Mpa la germinación fue nula en todos los cultivares.

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Trait associations in common bean genotypes grown under drought stress and field infestation by BSM bean fly

Cited by 64 publications

References 25 publications

Genetic Variability of Agronomic Traits as Potential Indicators of Drought Tolerance in Common Beans (Phaseolus vulgaris L.)

Genetic Variability of Agronomic Traits as Potential Indicators of Drought Tolerance in Common Beans (Phaseolus vulgaris L.)

Trait Associations in Diversity Panels of the Two Common Bean (Phaseolus vulgaris L.) Gene Pools Grown under Well-watered and Water-Stress Conditions

Germinación de cultivares de frijol con características físicas contrastantes bajo condiciones de estrés osmótico

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