Assessment of genetic variability, heritability and genetic advance in Tomato

Behera, Mamata; Jagadev, P. N.; Das, S. K.; Pradhan, K.; Sahoo, Bibhuti Bhusan

doi:10.22271/chemi.2020.v8.i4h.10319

Cited by 7 publications

(7 citation statements)

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“…Earlier investigators, such as Eppakayala et al (2021) , studied significant variations for numerous traits in tomatoes. The conclusion in the current study aligned with the earlier research outcomes ( Ramzan et al, 2014 ; Behera et al, 2020 ). Days to 50% flowering indicated an early maturing attitude of parents/hybrids.…”

Section: Discussionsupporting

confidence: 92%

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Study of genetic variability, heritability, and genetic advance for yield-related traits in tomato (Solanum lycopersicon MILL.)

Rasheed

Ilyas²,

Khan³

et al. 2023

Front. Genet.

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Tomato is one of the most significant vegetable crops, which provides several important dietary components. Pakistan has a significant low tomato yield compared to other countries because of low genetic diversity and the absence of improved cultivars. The present study aimed to investigate the genetic variability, heritability, and genetic advance for yield and yield-related traits in tomato. For this purpose, eight tomato parents and their 15 crosses or hybrids were evaluated to study the relevant traits. Significant variation was observed for all studied traits. Higher values of the genotypic coefficient of variability (GCV) and phenotypic coefficient of variability (PCV) were recorded for yield per plant (YP) (kg) (37.62% and 37.79%), as well as the number of fruits per cluster (NFRC) (31.52% and 31.71%), number of flowers per cluster (24.63 and 24.67), and single fruit weight (g) (23.49 and 23.53), which indicated that the selection for these traits would be fruitful. Higher heritability (h2) estimates were observed for the number of flowers per cluster (NFC) (0.99%), single fruit weight (SFW) (g) (0.99%), and yield per plant (YP) (kg) (0.99%). Single fruit weight (SFW) (g) exhibited higher values for all components of variability. High genetic advance as a % of the mean (GAM) coupled with higher heritability (h2) was noted for the yield per plant (YP) (kg) (52.58%) and the number of fruits per cluster (NFRC) (43.91). NFRC and SFW (g) had a highly significant correlation with YP (kg), while FSPC had a significant positive association with YP (kg), and these traits can be selected to enhance YP (kg). Among the 15 hybrids, Nagina × Continental, Pakit × Continental, and Roma × BSX-935 were selected as high-yielding hybrids for further evaluation and analysis. These findings revealed that the best performing hybrids could be used to enhance seed production and to develop high-yielding varieties. The parents could be further tested to develop hybrids suitable for changing climatic conditions. The selection of YP (kg), SFW (g), NFC, and NFRC would be ideal for selecting the best hybrids.

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Section: Discussionsupporting

confidence: 92%

“…A higher h 2 coupled with the medium genetic advance indicated the need for single plant selection to improve the genotypes. The further crossing is obligatory to create desired variations if both components are low in traits ( Behera et al, 2020 ). SFW (g) had higher values for all components of variability.…”

Section: Discussionmentioning

confidence: 99%

Study of genetic variability, heritability, and genetic advance for yield-related traits in tomato (Solanum lycopersicon MILL.)

Rasheed

Ilyas²,

Khan³

et al. 2023

Front. Genet.

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“…The found strong genetic progress in percent mean for fruit clusters per plant, individual fruit weight, yield per plant, and fruits per cluster, along with their high heritability, suggests that these features might be effectively selected for. [19], [20], [21], [22], [23], [24]) and [25] have also published ndings that are similar to these. D50% F-Days to 50% owering, PHFF-Plant height at rst owering (cm), BPP-Branches per plant (no.…”

Section: Analysis Of Genetic Parameterssupporting

confidence: 56%

Evaluation of F2 Tomato Hybrids for Yield and Related Traits in Jima Geneti District, Western Ethiopia

Soresa

2024

Preprint

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Tomatoes are a vegetable crop grown by smallholder farmers in the Horro Guduru region, which is in the mid-latitude. Therefore, it is crucial to create high-yielding and resistant types of tomatoes. As a result, there has been little work done to tackle the issue and little knowledge on tomato erraticism. As a result, the experiment was created to assess tomato hybrids that were F2 segregated in order to measure variability, character association, and path coefficient analysis. In Jima Genet area, Western Ethiopia, in 2022 GC, an experiment involving 28 F2 tomato hybrids in RCBD with three replications was conducted. Significant variations were found between the F2 hybrids for each attribute according to analysis of variance. For the variables days to first flowering (pcv=8.81, gcv=8.12), fruit length (pcv=16.14, gcv=14.84), and fruit diameter (pcv=17.10, gcv=14.92), very minimal variations were found between the phenotypic coefficients of variation (PCV) and genotypic coefficients of variation (GCV). With the exception of flowers per cluster (47.83%), all yield-contributing traits showed high heritability (>50%). Fruit clusters per plant (105.11), fruits per plant (103.43), branches per plant (34.49), fruits per cluster (47.43), individual fruit weight (77.73), and fruit output per plant (108.25) all showed strong heritability linked to high genetic progress. To increase tomato fruit output, selection for such features may be useful. Plant heights at first blooming, flowers per plant, fruits per cluster, fruit clusters per plant, and fruits per plant with fruit output per plant were found to be significantly positively correlated both genotypically and phenotypically. Individual fruits per plant (0.674) and fruits per plant as a whole (1.096) had the most beneficial direct effects on fruit output per plant. To lessen the indirect influence of the other qualities during the creation of a high-yielding tomato variety, direct selection may be carried out with these traits serving as the primary selection criteria.

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“…Medium genetic advance along with high h 2 would be ideal for conducting single-plant selection for the improvement of genotypes. It is thus imperative to conduct further hybridization to create preferred variations if both the components are low in traits [36]. A higher genetic advance along with h 2 for an average weight of 10 bulbs, total soluble solids ( • Brix), and neck thickness (cm) confirms that an effective selection of these attributes would result from the presence of additive gene action [6].…”

Section: Discussionmentioning

confidence: 99%

“…In additive gene action, genes behave uniformly in the phenotype and do not control one another. The higher the number of genes, the stronger the phenotype [36]. It is thus essential to choose genotypes with high h 2 and genetic advances for attributes relevant to yields.…”

Section: Discussionmentioning

confidence: 99%

Genetic Variability and Diversity in Red Onion (Allium cepa L.) Genotypes: Elucidating Morpho-Horticultural and Quality Perspectives

Amir,

Sharangi,

Bal

et al. 2023

Horticulturae

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Onion (Allium cepa L.) is a prominent spice and vegetable crop farmed commercially worldwide. Variability is viewed as a key signal for any red onion enhancement effort. The current study was, therefore, carried out to learn about genetic variability and diversity among selected genotypes of 20 red onions at the C Block Farm, Bidhan Chandra Krishi Viswavidyalaya, India, during the winter (rabi) season of 2021–2022, in Randomized Complete Block Design (RCBD) with three replications. The characters, viz., average weight of bulbs (kg), neck thickness (cm), total soluble solids (°Brix), total sugar (%), and reducing sugar (%) demonstrated high heritability (97.38–99.97%) coupled with high genetic gain. Such traits were the least influenced by environmental effects, and additive gene action played a pivotal role in the manifestation of such characters. Traits with high heritability values (51.37–67.94%) demonstrate that the observed variability was under genetic control and provide an enormous range of possibilities for accomplishing selection depending on their phenotypic performances. For traits with moderate heritability, viz., bolting (%) and doubling (%), selection would be less effective but can still be given great importance. Based on correlation analysis, the character’s neck thickness, equatorial diameter, and polar diameter unveiled highly positive genetic correlation with the average weight of bulbs (0.120, 0.112; 0.194, 0.210 and 0.120, 0.112 for phenotypic and genotypic correlation coefficient values, respectively), which indicates that the average weight of a bulb would be increased by an increase in such components. According to path coefficient analysis, the equatorial diameter exhibited the most positive direct effect on the average weight of bulbs (0.968), followed by polar diameter (0.687) and neck thickness (0.159). A wide range of variations for qualitative traits, including foliage colour, leaf width, foliage behaviour, the degree of leaf waxiness, the shape of the bulb, and bulb skin colour were observed. Based on Mahalanobish D2 analysis, the genotypes were divided into four clusters. The highest number of genotypes was found in cluster I (eleven), followed by cluster IV (six genotypes) and cluster II (two genotypes). Cluster III had a single genotype and was monogenic. The study confirmed that a wide genetic variation prevailed in the onion genotypes taken under study, which could thereby be utilized in breeding programmes.

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Assessment of genetic variability, heritability and genetic advance in Tomato

Cited by 7 publications

References 0 publications

Study of genetic variability, heritability, and genetic advance for yield-related traits in tomato (Solanum lycopersicon MILL.)

Study of genetic variability, heritability, and genetic advance for yield-related traits in tomato (Solanum lycopersicon MILL.)

Evaluation of F2 Tomato Hybrids for Yield and Related Traits in Jima Geneti District, Western Ethiopia

Genetic Variability and Diversity in Red Onion (Allium cepa L.) Genotypes: Elucidating Morpho-Horticultural and Quality Perspectives

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