Assessment Studies on Genetic Variability Traits in Different Lines of Tomato (Solanum lycopersicum L.) (original) (raw)
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Journal of Pharmacognosy and Phytochemistry, 2020
59 genotypes of tomato including three checks were subjected to study the extent of variability present in the experimental material for yield and yield attributing traits at V.R.C., G.B.P.U.A. & T., Pantnagar, Uttarakhand, India for two consecutive years i.e. 2014 and 2015. Analysis of variance revealed the presence of high variability for all the 14 characters studied. Evaluation of 59 genotypes of tomato elucidated high magnitude of PCV as well as GCV for number of fruits/plant followed by average fruit weight (g), fruit yield (q/ha) and ascorbic acid (mg/100 g). The heritability coupled with genetic advance as per cent of mean were high for ascorbic acid (mg/100 g), number of fruits/plant, average fruit weight (g), fruit yield (q/ha), number of locules/fruit, pericarp thickness (mm) and number of fruits/cluster which suggests that these characters could be improved by selection.
Genetic variability and heritability studies in diverse tomato genotypes
Journal of Pharmacognosy and Phytochemistry, 2020
Tomato is one of the most important solanaceous vegetable that can be grown throughout the year, although its main cultivation season is autumn-winter. The present experiment was conducted utilizing twenty-five diverse genotypes of tomato in the autumn-winter season of 2018-19 for assessing the variability, heritability and genetic advance for different growth, reproductive, fruit morphological, yield and important quality attributes. High degree of variability was observed for all the traits that showed the traits were suitable for selection for further breeding purposes. GCV was higher than PCV for all the characters under study. High PCV, GCV and heritability coupled with high genetic gain was observed for plant height, number of fruits per truss, polar diameter, equatorial diameter, pericarp thickness, locule number, average fruit weight, fruit number per plant, yield per plant, TSS, lycopene content, β-carotene content and total yield. This indicated that additive gene action p...
Estimation of the existing variability in the available germplasm and knowledge about association of various traits is helpful for multiple trait selection and necessary to develop desirable genotypes of tomato. Keeping this in view, evaluation of genetic parameters and association studies were conducted in a set of 14 landraces of tomato for 8 quantitative traits over 2 seasons (2010/2011 -2011/2012) at Dara'a Center of Scientific Agricultural Research, GSAR, Syria. Highly significant differences were found among the genotypes for all the traits studied, indicating wide range of variability and providing ample scope for selecting the desirable types. The phenotypic coefficient of variation (PCV) was greater than the respective genotypic coefficient of variation (GCV) for all the traits, denoting the environmental factors influencing their expression to some degree or other. High estimates of broad sense heritability (h 2 ) and genetic advance as percent over mean (GA %) were observed for plant height, number of locules/fruit and pericarp thickness which might be assigned to additive gene effects. Correlation studies indicated that days to maturity, number of locules/fruit and pericarp thickness were positively and significantly correlated with fruit yield at both genotypic and phenotypic levels, indicating the importance of these traits as selection criteria.
2021
The genetic parameters were studied to elucidate the genetic variability, heritability, genetic advance and genetic advance as per cent over mean in tomato (Solanum lycopersicum L.). Sixty diverse genotypes were evaluated during the year 2019-20 at experimental research farm of the Haweli campus, College of Horticulture, Bagalkot, and Karnataka. The analysis of variance revealed highly significant difference among 60 genotypes for all 24 characters under study. Phenotypic coefficient of variation (PCV) was higher than genotypic coefficient of variation (GCV) for majority of the characters studied indicating influence of the environment on the trait expression. High heritability with high genetic advance as per cent of mean was observed for plant spread (98.2% and 35.76%), equatorial diameter (95.40% and 42.68%), polar diameter (96.00% and 38.97%), pericarp thickness (66.10% and 35.27%), fruit color (79.80% and 37.70%), fruit pH (91.40% and 31.99), lycopene (75.90% and 60.388%), titr...
The present research programme, Genetic variability, heritability and genetic advance for yield and yield attributes in tomato (Solanum lycopersicum L.), was carried out at Hill Millet Research Station, Waghai, The Dangs, NAU. Rabi season 2021-22. Fifty genotypes of tomato were evaluated in Randomized Block Design with three replications. The analysis of variance revealed highly significant variation among the genotypes for all the characters studied indicating considerable amount of variability among the genotypes. High GCV and PCV were observed for plant height, average fruit weight, total number of fruits per plant, total soluble solids, vitamin c. This indicates the existence of broad genetic base, which would be amenable for further selection. High heritability coupled with high genetic advance as per cent of mean was observed for plant height, average fruit weight (g), total number of fruits, yield per plant (kg/ha), total yield (t/ha), TSS and vitamin C content.
International Journal of Plant & Soil Science
The present experiment was conducted utilizing sixteen diverse genotypes of tomato in the autumn-winter season of 2022-23 for assessing the genetic variability, heritability and genetic advance for different growth, reproductive and yield attributes. Analysis of variance revealed significant differences among all the genotypes for all the characters. High degree of genetic variability was observed for all the traits that showed the traits were suitable for selection for further breeding purposes. GCV was higher than PCV for all the characters under study.High PCV accompanied by high GCV was recorded for fruit yield per plant (kg) and fruit yield per plot (kg), number of clusters per plant, plant height (cm), number of primary branches per plant, number of fruits per plant, locule number, average fruit weight (g), number of flower per cluster, however the difference between the PCV and GCV was paltry, which indicating the high contribution of genetic component in phenotypic expressio...
Journal of Pharmacognosy and Phytochemistry, 2020
The genetic parameters were studied to elucidate the genetic variability, heritability and genetic advance in tomato (Solanum lycopersicum L.). Evaluation of thirty genotypes of tomato was done in randomized block design at vegetable research farm, RPCAU, Pusa, Samastipur, Bihar. The genotypes exhibited a wide range of variability for all the characters studied. Phenotypic coefficient of variation (PCV) was higher than genotypic coefficient of variation (GCV) for all the characters studied. High heritability combined with high genetic advance was observed for the characters plant height, number of clusters per plant, number of flowers per cluster, number of fruits per cluster, number of fruits per plant, fruit length, fruit weight, fruit yield per plant, ascorbic acid and TSS. High heritability combined with high genetic advance indicates that additive gene action plays a major role in governing these traits and these traits can be improved by simple selection.
2014
Abstract: The genetic parameters, character association and path coefficient analysis between yield and yield contributing characters of different tomato genotypes were studied. The genotypes exhibited a wide range of variability for all the traits studied. The traits were also found to be highly heritable. High genetic advance as percentage of mean was exhibited for fruit weight/plant followed by number of fruits in three cluster/plant and number of flowers in three clusters/plant. Fruit yield had high positive r and r with total number of fruits atp g harvesting period and number of fruits in three clusters/plant. Plant height at flowering, number of flowers in three clusters/plant, days to flowering and total number of fruits at harvesting period also contributed yield directly. The results indicate that for increasing yield, selection should be based on plants bearing more fruits of larger size and weight. Key words: Genetic variability Tomato Lycopersicon esculentum Mill INTROD...