Genetic variability, character associations and path coefficient studies in tomato (Solanum lycopersicum L.) grown under terai region of West Bengal (original) (raw)

Studies on genetic variability, heritability and genetic advance for yield and quality traits in Tomato (Solanum lycopersicum L.)

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.

Morphology Based Genetic Variability Analysis and Identification of Important Characters for Tomato (Solanum lycopersicum L.) Crop Improvement

The present investigation was carried out to study the genetic variability for yield and yield attributes of tomato (Solanum lycopersicum L.). The pooled analysis of variance revealed significant variation among the genotypes studied for all the characters except primary branches plant 1. The genotype H-24 was found to be the best among the genotypes for yield (1309.50g plant 1) and fruit cluster plant 1 (37.33) and ultimately resulted in highest yield ha 1 (401.64q). The genotype 2012/TOLCVRES-3 had significantly highest for single fruit weight (71.33g). Another genotype, NDT-3 was the best for fruit diameter (6.47cm). Sel-35 had more fruits and fruit clusters plant 1. High GCV were observed for fruit cluster and fruits plant 1, single fruit weight, fruit yield plant 1 and fruit yield ha 1. High heritability coupled with high genetic advance was observed for fruits plant 1, single fruit weight, fruit yield plant 1, fruit clusters plant 1 and fruit yield ha 1 indicating the presence of additive gene effects which may be utilized for improvement through phenotypic selection for yield improvement. High heritability with moderate to low genetic advance was observed for days to 50% flowering and fruiting, first and last picking, plant height and fruit diameter. Fruit yield plant 1 was positively correlated with fruit diameter, single fruit weight and yield ha 1 suggesting that selection based on these characters would result better genotypes with higher yield. Path coefficient analysis study revealed positive direct effect for fruit diameter, single fruit weight, fruits and fruit cluster plant 1 on yield plant 1 and selection based on these characters would be more reliable for yield improvement.

Genetic Analysis of Growth, Yield and Quality Parameters in Tomato (Solanum lycopersicum L.) under Tropical Climate of Eastern Uttar Pradesh

Journal of Safe Agriculture, 2017

Research trial in three environments was carried out at Vegetable Research Farm of the Institute of Agricultural Sciences, Banaras Hindu University, Varanasi to assess the genetic variability in tomato genotypes during 2010. In general, phenotypic coefficient of variation was higher than the corresponding genotypic coefficients of variation for all the characters. Plant height, number of fruits per plant, average fruit weight, pericarp thickness and number of fruit per cluster exhibited high estimates of phenotypic as well as genotypic coefficient of variation indicating substantial scope of improvement in these traits in present material through selection. High heritability in narrow sense was recorded for plant height, number of primary branches per plant, number of fruits per plant, average fruit weight, pericarp thickness, ascorbic acid and number of fruit per cluster in all three environmental conditions. However, total yield per plant and total soluble solids content exhibited moderate magnitude of heritability (h2n) in both the environments. The presence of high extent of h2n for these characters indicated considerable magnitude of additive gene action which can be exploited by selection procedure for improving the characters due to its fixable nature. Higher estimates of h2b were recorded for most of the characters under study.High heritability in broad sense (h2b) coupled with higher expected genetic advance (%) recorded for plant height, number of fruits per plant, average fruit weight, pericarp thickness, titratable acidity, total soluble solids and number of fruits per cluster, indicated greater scope for further improvement in these traits in advance generations.

Assessment of genetic variability in tomato (Solanum lycopersicum L.) for yield and yield attributing traits

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...

Study of genetic variability, heritability and genetic advance for yield and yield parameters in tomato (Solanum lycopersicum L.) germplasm

Journal of Pharmacognosy and Phytochemistry, 2021

Forty genotypes of tomato were evaluated for yield and various yield attributing characters at PG student research farm, College of Horticulture, Rajendranagar, Hyderabad during Kharif, 2017. The experiment was laid out in Randomized Complete Block Design with three replications. High PCV and GCV were recorded for fruit weight (g), fruit yield per plant (kg), yield per ha (t) and total soluble solids indicating the existence of wider genetic variability for these traits in the genotypes. Low estimates of genotypic and phenotypic coefficient of variations were observed for per cent fruit set, days to first harvest, days to last harvest and ascorbic acid content suggesting narrow range of genetic variability for these traits. High heritability coupled with high genetic advance as per cent of mean indicates operation of additive gene action, which was observed in characters viz., plant height, days to first flowering, days to 50% flowering, number of flower clusters per plant, number of flowers per cluster, number of fruits per cluster, number of fruits per plant, number of marketable fruits per plant, days to first harvest, days to last harvest, fruit length, fruit width, fruit weight, fruit yield per plant, fruit yield per ha, total soluble solids, ascorbic acid content, lycopene content and beta-carotene, which showed high level of genetic advance indicating opportunity for better selection response. The results of genetic parameters from the present study may be helpful to the plant breeder in selection of elite genotypes from diverse genetic populations.

Genetic Variability and Character Association in Tomato (Solanum Lycopersicum L.)

Bangladesh Journal of Botany

The genetic variability and character association among important yield and attributing traits was studied in 20 genotypes of tomato. The magnus of the phenotypic coefficient of variation (PCV) for all characteristics was higher than the magnitude of the genotypic coefficient of variation (GCV). High PCV, GCV, and heritability accompanied by high genetic advance as per cent of mean was recorded for the number of fruits per plant, average fruit weight, number of flower clusters/plant, number of fruits per cluster, plant height, number of flowers per cluster and locule number, polar diameter, equatorial diameter, pericarp thickness, fruit yield/plant. Therefore, selection in early generations would be effective in the improvement of these traits. The trait inter-relationship studies revealed that for aiming at high-yielding tomato genotypes, selection based on average fruit weight, number of fruits per plant, polar and equatorial diameter, plant height, number of primary branches, day...

Studies on genetic parameters for yield and yield attributing traits in tomato (Solanum lycopersicum L.)

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.

Study on Genetic Variability, Heritability, Genetic Advance in Tomato (Solanum lycopersicum L.)

International Journal of Current Microbiology and Applied Sciences

An experiment was conducted to evaluation of genetic variability present in the twenty genotypes and observations were recorded on various yield and yield contributing characters. Analysis of variance showed the significant variability for all the studied characters. High values of GCV and PCV were observed for characters viz., number of fruits per plant (55.74, 56.21), number of locules per fruit (36.44, 37.15), average fruit weight (35.45, 35.97) fruit yield per plant (31.09,32.35) marketable fruit yield per plot (31.10, 32.36) and which indicates the presence of high genetic variation. High heritability coupled with high genetic advance observed for the traits viz., plant height, number of flowers per cluster, number of fruit set per cluster, average fruit weight, number of fruits per plant, fruit yield per plant, fruit yield per plot, fruit shape index, TSS 0 Brix, Ascorbic acid, Beta carotene, Pericarp thickness, Number of locules per fruit. Which indicates presence of additive gene action and demands for population improvement by selection K e y w o r d s

Genetic Variability, Character Association and Path Coefficient Analysis in Tomato (Lycopersicon Esculentum MILL.) Genotypes

2015

Genetic variability, correlation and path coefficient analysis was studied in thirteen tomato (Lycopersicon esculentum Mill.) genotypes for yield and its attributing characters. The analysis of variance revealed significant differences among the genotypes for all the characters studied indicating a high degree of variability in the material. The highest PCV and GCV were recorded for number of fruits, yield/plant, fresh weight, vitamin C and number of branches indicating presence of ample variation for these traits in the present material. In the present study, high estimates of heritability and genetic advance as per cent of mean were obtained for fresh weight and fruit diameter. Thus, selection of these traits is likely to accumulate more additive genes leading to further improvement of their performance and these traits may be used as selection criteria in tomato breeding program. The yield/ha exhibited significant positive correlation with plant height, number of branches, number...