Performance Evaluation of Common Bean (Phaseolus vulgaris L.) Genotypes for Yield and Related Traits at Areka, Southern Ethiopia

Abstract

Common bean is a source of dietary protein and the second most important legume crop in Africa next to faba bean. In Ethiopia common bean is the most important legume as the source of protein and export commodity. Hence, development of commercial varieties is one of the major tasks to meet increasing demand of the stake holders. To this effect, understanding the genetic variability, heritability and association between grain yield and other agronomic traits is necessary for effective plant breeding program. In this context, a field experiment was conducted during 2016/2017 cropping season at Areka Agricultural Research Center in southern Ethiopia with the objective of evaluating common bean genotypes for yield and related traits and also estimate the variability present among the genotypes. Treatments consisted of thirty three common bean genotypes were laid out in a randomized complete block design (RCBD) with three replications. Common bean genotypes exhibited considerable variations for agronomic traits and grain yield. Majority of the traits; plant height, number of nodes, internode length, leaf area, LAI, biological yield, pods per plant, HI and HSW had higher PCV. Genotypic coefficient of variance (GCV) varied from 1.88% to 37.72% with the highest GCV recorded for HSW. Heritability in broad sense (H2) ranged from 0.52% to 95.33% with the highest value observed for HSW. The present study revealed significant variation among genotypes for traits considered except few insignificant traits. In addition, almost all the genotypes were well adapted to the study area and hence, the high yielding genotypes could be directly used as seed sources for production of common bean and some of the genotypes with best diseases resistance reaction, and with high heritability can possibly be used in common bean improvement program.

Estimation of the Variation Coefficient and Some Local Genetical Resources of Some Common Bean

“…Variance components values in Table (6) show that the large portion of genotypic variance for the following characters: plant length, number of branches, pod length, pod width, fresh pod weight, dry pod weight, number of seeds / pod, number of pods / plant, total pods yield / plant, total seeds yield / plant and 100 seeds weight. Moderate values were in traits height of the first pod and number of days to first pod these results were in agreement with those found by Fahad et al, (2014) and Yohannes et al, (2020). They stated that the genotypic (GV) and phenotypic (PV) variability are considered the important criteria in a successful breeding program and understand the genotypic difference of the most important quantity traits.…”

“…Hence, the development of commercial varieties is one of the major tasks to meet the increasing demand of the stakeholders. To this effect, understanding the genetic variability, heritability and association between grain yield and other agronomic traits is necessary for an effective plant breeding program (Yohannes et al, 2020).…”

Identification of sources of resistance to common bacterial blight in common bean in Ethiopia

“…Yohannes et al. (2020) reported that some of the SMC‐ and SEC‐lines performed better in terms of grain yield and resistance to the major bean diseases at the Areka site in Southern Ethiopia. The common bean lines which were selected for drought tolerance were reportedly resistant to the CBB.…”

Morphological and Yield Traits of Pole-Type French Bean Genotypes

“…The significant variation observed in cluster number per plant and pod number per plant in the years due to variation in temperature and rainfall (Figure1). The significant variation among the genotypes for green pod number per plant had been reported by many researchers (Akhilesh et al 2013, Muthuramu et al 2015, Yohannes et al 2020. The variation in number of green pod per plant might also be due to differences in inflorescences, pods number per racemeand flower dropping tendency of the genotypes (Khan 2003).…”