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Frequencies distribution of different modalities of the panicle exsertion (a) grain coverage (b), grain color (c), and grain shape (d) of 29 sweet stalk sorghum genotypes. Bars represent standard error.
Source publication
Sweet stalk sorghum has been the subject of very few investigations in Burkina Faso. This study aimed to evaluate the variability of agro-morphological traits and to estimate genetic parameters as well as the correlations between quantitative traits in order to identify appropriate breeding strategies. Eighteen traits were evaluated in 29 sweet sor...
Citations
... These interrelationships are critical for the selection of high-performing genotypes with superior biofuel potential. Similar correlation patterns have been reported by Bandara et al., (2020) and Sawadogo et al., (2023), further validating our observations. The strong positive associations among traits indicate that simultaneous improvement of these characters is feasible, enhancing the efficiency of breeding programs targeting high biomass and sugar yield in sweet sorghum. ...
... In this study, 55.1 % of the genotypes exhibited slight panicle exertion, followed by 36 % that were exserted, 5.8 % that were well exserted, 1.3 % with peduncle re-curved, and 1.8 % with the panicle covered by leaf sheath. These findings are consistent with the previous results reported by Derese et al. [31], in sorghum, where 26.32 % of the genotypes showed exserted panicles, while 73.68 % had well-exserted panicles, and Sawadogo et al. [32] in sorghum found that most of the genotypes had panicle exsertion of 86.21 %, while a small proportion of 13.79 %) had no panicle exsertion. Panicle compactness (inflorescence type) varied greatly among sorghum accessions, with 39.6 % of the genotypes having a compact elliptic panicle shape, followed by 26.2 % having a loose erect panicle, 18.2 % having a loose drop, and 16 % having a compact oval or curved shape (Table 3). ...
... Previous sorghum research has shown similar results, with a high Shannon-Weaver diversity index for qualitative traits [53]. In contrast, Sawadogo et al. [32] found the lowest Shannon diversity index for panicle extraction and the highest Shannon-Weaver diversity for grain color. ...
It is essential to comprehend genetic diversity for the conservation and effective utilization of crop genetic resources. There is limited information on genetic resource collection, phenotypic characterization, and conservation of sorghum genotypes in Ethiopia, particularly in the southern region. The study was conducted at the Jinka Agricultural Research Centre during the 2021 cropping season, to quantify and qualitatively assess the morphological diversity of sorghum genotypes. 225 genotypes were evaluated using a simple lattice design replicated twice. Data on 8 qualitative traits were collected and subjected to the Shannon-Weaver diversity index (H′) and multivariate analyses and data on 17 quantitative traits were subjected to multivariate analyses. The estimate of H′ ranged from 0.46 for grain color to 0.95 for panicle compactness and shape. Panicle exsertion, midrib color, pericarp color, awns, grain covering, and panicle compactness and shape were the most effective traits for distinguishing among sorghum genotypes. The first three and six principal components explained (59.0 %) and (76.5 %) of the total variation for qualitative and quantitative traits, respectively. A cluster analysis based on qualitative and quantitative traits identified five and four distinct groups, respectively. The highest inter-cluster distance was found between cluster I and V (D2 = 98.72) for qualitative, while the highest intercluster distance was found between cluster II and IV (D2 = 55.40) for quantitative traits. Within and between clusters, the intra and inter-cluster distances ranged from 1.60 to 7.61 and 14.64–55.40 units, respectively. The observed genetic distance exhibited within and among clusters has to be exploited for the selection of the most divergent parents in future breeding programs
... In this study, 55.1 % of the genotypes exhibited slight panicle exertion, followed by 36 % that were exserted, 5.8 % that were well exserted, 1.3 % with peduncle re-curved, and 1.8 % with the panicle covered by leaf sheath. These findings are consistent with the previous results reported by Derese et al. [31], in sorghum, where 26.32 % of the genotypes showed exserted panicles, while 73.68 % had well-exserted panicles, and Sawadogo et al. [32] in sorghum found that most of the genotypes had panicle exsertion of 86.21 %, while a small proportion of 13.79 %) had no panicle exsertion. Panicle compactness (inflorescence type) varied greatly among sorghum accessions, with 39.6 % of the genotypes having a compact elliptic panicle shape, followed by 26.2 % having a loose erect panicle, 18.2 % having a loose drop, and 16 % having a compact oval or curved shape (Table 3). ...
... Previous sorghum research has shown similar results, with a high Shannon-Weaver diversity index for qualitative traits [53]. In contrast, Sawadogo et al. [32] found the lowest Shannon diversity index for panicle extraction and the highest Shannon-Weaver diversity for grain color. ...
It is essential to comprehend genetic diversity for the conservation and effective utilization of crop genetic resources. There is limited information on genetic resource collection, phenotypic characterization, and conservation of sorghum genotypes in Ethiopia, particularly in the southern region. The study was conducted at the Jinka Agricultural Research Centre during the 2021 cropping season, to quantify and qualitatively assess the morphological diversity of sorghum genotypes. 225 genotypes were evaluated using a simple lattice design replicated twice. Data on 8 qualitative traits were collected and subjected to the Shannon-Weaver diversity index (H′) and multivariate analyses and data on 17 quantitative traits were subjected to multivariate analyses. The estimate of H′ ranged from 0.46 for grain color to 0.95 for panicle compactness and shape. Panicle exsertion, midrib color, pericarp color, awns, grain covering, and panicle compactness and shape were the most effective traits for distinguishing among sorghum genotypes. The first three and six principal components explained (59.0 %) and (76.5 %) of the total variation for qualitative and quantitative traits, respectively. A cluster analysis based on qualitative and quantitative traits identified five and four distinct groups, respectively. The highest inter-cluster distance was found between cluster I and V (D 2 = 98.72) for qualitative, while the highest inter-cluster distance was found between cluster II and IV (D 2 = 55.40) for quantitative traits. Within and between clusters, the intra and inter-cluster distances ranged from 1.60 to 7.61 and 14.64-55.40 units, respectively. The observed genetic distance exhibited within and among clusters has to be exploited for the selection of the most divergent parents in future breeding programs.
... The assessment of heritability and genetic advance is used in breeding numerous crops. There are popular publications of genetic studies on rice (Demeke et al., 2023), maize (Asare et al., 2022), sorghum (Sawadogo et al., 2023) and others. ...
Creating high-yielding cultivars with improved grain quality is a major priority in durum wheat breeding. Variability, her-itability and genetic advance were studied for the following traits: grain yield, plant height, productive tillering, spike length, number of spikelets per spike, number of kernels per spike, kernels weight per spike, thousand kernel weight, protein content, wet gluten content, SDS-sedimentation value, yellow pigments content, vitreousness and test weight of 90 durum wheat genotypes of different origins. The phenotypic coefficient of variation (PCV) was established to be higher than the genotypic coefficient of variation (GCV) for all studied traits, which reflects the impact of the environmental conditions on the variation of these traits. The highest phenotypic (PCV-41.66%) and genotypic (GCV-41.39%) coefficients of variation were established for sedimentation value. High broad-sense heritability coefficients (h 2 BS) were established for almost all studied traits. The heritability for these traits ranged from 54.74% for number of kernels per spike to 98.72% for SDS-sedimentation value. The lowest coefficient of heritability was established for kernels weight per spike-5.5%. High genetic advance as a percentage of the mean was calculated for the following traits: SDS-sedimentation value (84.71%) and grain yield (20.95%). A high herita-bility coefficient combined with high genetic advance was found for the following traits: SDS-sedimentation value and grain yield. This shows the presence of additive gene effects in the exression of these traits and therefore direct selection by these traits is possible under our conditions.
Groundnuts (Arachis hypogaea L.), is a crucial food and oil crop in the tropics, require genetic variability assessment for efficient breeding programs using appropriate parameters like genetic coefficient of variation, heritability estimates, association among yield related traits and genetic advance. This study aims to identify genotypes with desirable traits to improve yield and adaptability, contributing to better crop improvement strategies. The study used a randomized complete block design with three replications, consisting of fourteen selected genotypes. Quantitative traits were used to estimate genetic variability parameters, heritability, and genetic advance. The analysis of variance revealed significant differences (p < 0.005) for all studied traits, indicating greater variability in genotypes. Characters exhibited different levels of variability, heritability, and genetic advance among the genotypes. The estimate of the broad-sense heritability ranged from 13.33% to 33.33% for canopy spread and days to maturity respectively. Low to high phenotypic coefficient of variation (PCV) and genotypic coefficient of variation (GCV) were recorded. The study found that traits such as number of branches, pods per plant, fresh and dry plant weight, kernel yield, pod yield, and shelling percentage showed high genotypic coefficient of variation, moderate broad sense heritability, and high genetic advance. These traits can be beneficial for groundnut improvement through effective phenotypic selection, resulting in high expected genetic gain. The study found that pod yield is significantly correlated with kernel yield, grain length, grain width, 100-seed weight, fresh and dry 100-pod weight, and number of pods per plant. Kernel yield is positively correlated with the number of branches per plant, pod per plant, fresh and dry 100-pod weight, 100-seed weight, grain length, and grain width. In addition, the first four principal components accounted for 90.37% of total variation in all morphological traits.
