Breeding Potential of Some Exotic Tomato Lines: A Combined Study of Morphological Variability, Genetic Divergence, and Association of Traits

Islam, Shafiul; Hassan, Lutful; Hossain, Mohammad Anwar

doi:10.32604/phyton.2022.017251

Cited by 10 publications

(6 citation statements)

References 37 publications

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“…Plant height, number of clusters, number of fruits per cluster, average fruit weight, rind thickness, and number of locules all had high estimates of heritability with high genetic advance as a percent over mean. These findings are consistent with those of Khan et al (2017) and Islam et al (2022). It could be assigned to be controlled by additive genes and phenotypic selection for their improvement could be accomplished through simple breeding methods.…”

Section: Resultssupporting

confidence: 92%

Estimation of Variability Parameters, Correlation and Path Coefficient Analysis in F2 Population of Tomato in the Cross Between Line 33-1 × La-1

NEVANI¹,

SRIDEVI²

2022

AJMBES

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Genetic variability, correlation and path coefficient analysis were the important parameters whichaid in the selection. For this study 300 F2 plants were used from the cross between Line 33-1 Ã LA-1. Thestudy showed that existence of large amount of genetic variability for all the characters studied viz., Plantheight, primary branches per plant, number of clusters, number of fruits per clusters, number of fruits perplant, average fruit weight, number of locules and fruit yield per plant exhibited higher values of genotypicand phenotypic coefficient of variation. Whereas, high heritability was exhibited by all characters exceptnumber of fruits per plant, while high genetic advance as per cent mean was exhibited by plant height,primary branches per plant, number of clusters, number of fruits per clusters, number of fruits per plant,average fruit weight, rind thickness, number of locules and fruit yield per plant. These characters can beeffectively improved through selection. Correlation indicated that yield was significantly and positivelyassociated with plant height, primary branches per plant, number of clusters, number of fruits per cluster,number of fruits per plant and average fruit weight. The number of clusters, average fruit weight, numberof fruits per cluster and number of fruits per plant had the most positive direct influence in path coefficientanalysis. To decrease the indirect influence of other traits during the creation of a high yielding tomatovariety, direct selection can be performed with these qualities as the primary selection criteria.

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Section: Resultssupporting

confidence: 92%

Estimation of Variability Parameters, Correlation and Path Coefficient Analysis in F2 Population of Tomato in the Cross Between Line 33-1 × La-1

NEVANI¹,

SRIDEVI²

2022

AJMBES

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“…High PCV and GCV recorded for most traits in the present study is an indication of high variability among the traits and possibility of improvement through selection. This supports the reports of Meena et al (2015) and Shafiul Islam et al (2022) on high PCV and GCV in tomato as reported for most of the considered traits in this study. The low PCV and GCV recorded for days to flowering is an indication of low variability among the genotypes for this trait while moderate PCV and GCV for pH level implies that the expression of this trait is equally influenced by additive and non-additive gene action.…”

Section: Discussionsupporting

confidence: 93%

“…This result is not in agreement with the findings of Tembe et al (2018) who reported that tomato genotypes with increased fruit size tend to have higher yields compared to those with smaller fruits. However, this contradicts the submissions of Shafiul Islam et al (2022) on the poor yield performance of tomato plants with tall plant architecture. The non-significant association between yield and nutritional values indicates that selection in favour of yield and yield related traits might reduce the frequency of genes associated with improved nutritional content in this population.…”

Section: Discussionmentioning

confidence: 76%

Genetic Variability in Nutritional Quality, Yield and Yield Attributes of Tomato (Solanum lycopersicum L.)

Anyaoha¹,

Adetula²,

Aderibigbe³

et al. 2023

Acta Univ. Agric. Silvic. Mendelianae Brun.

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The experiment was conducted to evaluate variability estimates for yield contributing and nutritional traits in 60 tomato (Solanum lycopersicum L.) hybrids and their parents. The trial was laid out in alpha lattice design and data pertaining to 13 quantitative, six nutritional and four qualitative characters have been presented. The estimates of mean, range, phenotypic coefficient of variation (PCV) and genotypic coefficient of variation (GCV) revealed significant phenotypic and nutritional variations among the genotypes for most of the characters under study. The principal component analysis showed that number of marketable fruits, number of non-marketable fruits, marketable yield, total yield, total number of fruits, number of fruits per cluster, fruit length and width, beta carotene, vitamin C, lycopene and acidity content contributed most to observed variations in the population. Five clusters were identified among the tomato population and they significantly associated with high nutritional content, high yield, yield contributing traits and fruit size related traits. For association among traits, moderate to very strong significant (P < 0.05) positive correlation was recorded for yield with number of branches (0.40), number of marketable fruit (0.84), number of non-marketable fruits (0.71), marketable yield (.98) and non-marketable yield (0.71). On the contrary, brix recorded weak negative significant correlation (-0.32) with non-marketable yield-while no significant association was observed between the agronomic and nutritional variables. Estimates of moderate to high heritability in the broad sense coupled with high genetic advance as a percentage of mean showed the feasibility of improving fruit nutritional quality, yield and yield contributing traits in this population through selection.

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“…A higher magnitude of GCV and PCV indicated the scope of selection as more variation results in an effective selection plan ( Islam et al, 2022 ). Usually, the magnitudes of PCV were, to some extent, higher than those of GCV for the given traits, demonstrating the role of the environment in the appearance of the trait.…”

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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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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Breeding Potential of Some Exotic Tomato Lines: A Combined Study of Morphological Variability, Genetic Divergence, and Association of Traits

Cited by 10 publications

References 37 publications

Estimation of Variability Parameters, Correlation and Path Coefficient Analysis in F2 Population of Tomato in the Cross Between Line 33-1 × La-1

Estimation of Variability Parameters, Correlation and Path Coefficient Analysis in F2 Population of Tomato in the Cross Between Line 33-1 × La-1

Genetic Variability in Nutritional Quality, Yield and Yield Attributes of Tomato (Solanum lycopersicum L.)

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

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