Genetic diversity in speckled bean (Phaseolus vulgaris L.) genotypes in Ethiopia

Gelaw, Yonas Moges

doi:10.5897/jpbcs2017.0686

Cited by 3 publications

(1 citation statement)

References 15 publications

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“…Plant height negatively correlated with harvest index (rp � −0.1699 * ) and pods per plant (rg � −0.247 * ) at phenotypic level, whereas it had a negative association with harvest index (rg � −0.258 * * ) at genotypic level. Tis result concurred with those reported in previous studies, in which plant height correlated with the number of pods per plant and harvest index [28,38,42,43]. Te number of pods per plant was positively and signifcantly associated with the number of seeds per plant (rp � 0.637 * * ), pod width (rp � 0.1948 * * ), and hundred seed weight (rp � −0.283 * * ) at genotypic level.…”

Section: Phenotypic and Genotypic Correlations Among Yield-relatedsupporting

confidence: 91%

Genetic Variability Analysis and Association of Traits in Common Bean (Phaseolus vulgaris L.) Landraces Collected from Ethiopia at Jimma

Mesera

Geneti

Alamerew

et al. 2022

Advances in Agriculture

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This study was conducted on one hundred common bean landraces at the Jimma Agricultural Research Center, Melko, with the objective of assessing genetic variability and association of traits in common bean landraces collected from different parts of Ethiopia. The experiment was laid out in a simple lattice design with two replications. Analysis of variance showed significant differences among genotypes for all traits. This highly significant difference indicates the existence of large variability among genotypes. High phenotypic coefficients of variation and genotypic coefficients of variation were obtained for plant height (19.43, 11.73), pod length (11.27, 10.69), and 100-seed weight (15.42, 12.74). High heritability in the broad sense was found for days to 50% flowering (66.98), days to 90% maturity (87.43), pod length (90.03), pod width (78.23), harvest index (98.67), and 100-seed weight (68.31). High genetic advance as a percentage of mean with high heritability was obtained for pod length, pod width, harvest index, and hundred seed weight. Grain yield had a positive and significant association with pod length (rp = 0.153 ∗ , rg = 0.282 ∗ ∗ ) and 100-seed weight (rp = 0.294 ∗ ∗ , rg = 0.492 ∗ ∗ ). Hundred seed weight exerted the highest positive direct effect (0.294) on grain yield at genotypic level. The D2 classified landraces into 7 clusters and one solitary, which makes them moderately divergent. The highest inter-cluster distance was observed between clusters VII and IV. The first five principal components with eigenvalues greater than one altogether explained about 79.56% of the total variation. In conclusion, the top high-yielding landraces, namely, P#1247, P#1092, P#1077, P#861, P#990, P#763, P#58, and P#857, should be included in the next breeding program. 100-seed weight had the highest direct effect and a positive significant association with grain yield. Thus, it should be considered as the selection criteria for further common bean yield improvement. However, the current result is merely indicative and cannot be used to draw definite conclusions. Therefore, the experiment should be replicated in different locations and seasons for greater consistency.

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Section: Phenotypic and Genotypic Correlations Among Yield-relatedsupporting

confidence: 91%

Genetic Variability Analysis and Association of Traits in Common Bean (Phaseolus vulgaris L.) Landraces Collected from Ethiopia at Jimma

Mesera

Geneti

Alamerew

et al. 2022

Advances in Agriculture

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GENETIC VARIABILITY AND ASSOCIATION OF TRAITS IN COMMON BEAN (Phaseolus vulgarisL.)GENOTYPES IN SEKOTA, NORTH WESTERN ETHIOPIA

Assefa,

Worku,

Bantayhu

et al. 2024

Preprint

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Common bean (Phaseolus vulgaris L.) is one of the most important pulse crops in Ethiopia, contributing to income generation and food security. Information on the genetic variability and trait associations of common bean in the Sekota district of north Western Ethiopia is inadequate. This study was initiated with the objective to assess variability, heritability and trait association among 64 common bean genotypes for quantitative traits using 8x8 simple lattice design at Aybra main research site 2023 under rain fed conditions. Analysis of variance was performed using SAS software and the ANOVA revealed highly significant variations among genotypes for all the traits considered in the study. The yield ranged from 1633.1 to 3702.10 kg ha-1with a mean of 2542.53 kg ha-1. There was a yield advantage of 24.56 to 55.89% over the checks. A moderate genotypic coefficient of variation coupled with high heritability and high genetic advance as a percentage of the mean was obtained for plant height, branches per plant, hundred seed weight, seed yield, and harvest index. Branches per plant, aboveground biomass and harvest index had significant positive correlations and direct effects on seed yield at the genotypic and phenotypic levels while days to maturity had a significant negative correlation and indirect effect with seed yield at the genotypic. The maximum inter cluster distance was found between clusters VII and 8 (D2=351.39), followed by clusters V and VIII (D2=331.23). The first five principal component axes accounted for 74.3% of the total variation, with eigenvalues greater than unity. The number of days to maturity, plant height, number of pods per plant, number seeds per pod, seed yield, and harvest index were the traits that contributed most of the variation in the first PCs. Generally, the presence of variability, and strong positive association of traits among the genotypes were observed in the traits under study. Therefore, selection based on agronomic performance and hybridization based on cluster distance could be possible for the improvement of common bean in the study area.

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Genetic Variability and Character Association among Common Bean (Phaseolus vulgaris L.) Genotypes at Areka, Southern Ethiopia

Kuma

2024

AJPB

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Evaluating genetic variability among genotypes is vital for identifying superior genotypes because selecting parents who create segregating populations is critical in breeding programs. The current study was done at Areka Agricultural Research Center during the 2020/21 major cropping season, with the goal of estimating genetic diversity and character connection among 25 common bean genotypes. The experiment consisted of two replications of a 5 x 5 simple lattice design. Data were obtained on 12 quantitative parameters, and the analysis of variance revealed extremely significant variations between genotypes for all characters. It demonstrated that genotypes vary significantly. GCV and PCV were highest in plant height, number of pods per plant, biological yield, number of seeds per plant, and seed yield, while lowest in days to flowering and days to maturity. Plant height, number of pods per plant, number of seeds per plant, biological yield, and seed yield all showed significant broad-sense heritability (H2) and high predicted genetic advance as a percentage of mean GAM. This suggested the presence of additive gene activity in the inheritance of these traits. The number of major branches per plant, biological yield, days of 50% flowering, hundred seed weight, and harvest index all show a highly substantial and positive link with seed yield at both genotypic and phenotypic levels. The biological yield and harvest index both have a strong positive direct effect on seed output. As indicated, these traits could be utilized for selection to increase seed output. Based on the D2 value, 25 common bean genotypes were divided into four clusters. Clusters I and IV had the greatest inter-cluster distance (766.78), whereas clusters I and II had the smallest (53.78). Breeding programs could use genotypes from distant clusters to increase variety. Thus, the enormous genetic variation among common bean genotypes must be evaluated for use in common bean breeding efforts.

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Genetic diversity in speckled bean (Phaseolus vulgaris L.) genotypes in Ethiopia

Cited by 3 publications

References 15 publications

Genetic Variability Analysis and Association of Traits in Common Bean (Phaseolus vulgaris L.) Landraces Collected from Ethiopia at Jimma

Genetic Variability Analysis and Association of Traits in Common Bean (Phaseolus vulgaris L.) Landraces Collected from Ethiopia at Jimma

GENETIC VARIABILITY AND ASSOCIATION OF TRAITS IN COMMON BEAN (Phaseolus vulgarisL.)GENOTYPES IN SEKOTA, NORTH WESTERN ETHIOPIA

Genetic Variability and Character Association among Common Bean (Phaseolus vulgaris L.) Genotypes at Areka, Southern Ethiopia

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