Genetic diversity analysis in elite lines of tomato (Solanum lycopersicum L.) for growth, yield and quality parameters (original) (raw)
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QUANTIFICATION OF GENETIC DIVERSITY ANALYSIS FOR THE IMPROVEMENT OF CULTIVATED TOMATO GENOTYPES
Fourteen commercial cultivars of tomato were investigated to understand the extent genetic diversity through 17 yield attributes. Based on D 2 statistics 14 genotypes were grouped into four clusters. The highest inter-cluster distance was observed between clusters I and III (38.17) and lowest in between the clusters I and II (6.23). The result revealed that yield/plant (46.2%) contributed maximum to the total divergence followed by fruit weight (28.7%) and thickness of pericarp (17.5%). Cluster III showed highest mean for primary branches/plant, number of fruits/plant, fruit length, fruit width, fruit weight, pedicel length, harvesting period and yield/plant. Cluster IV showed highest mean for leaflet length and width, number of leaflets/leaf, flowers/cluster, number of fruits/cluster and thickness of pericarp. Clusters I and III produced maximum lowest mean for almost all characters. Therefore, genotypes belonging to the clusters III and IV may be used as potential parents for future hybridization to produce new high yielding tomato lines with desired traits.
Assessment of genetic diversity through D2 analysis in tomato (Solanum lycopersicon L.))
The present experiment was conducted during spring-summer 2013 to study genetic variability, correlation, path coefficient analysis, and genetic diversity for quantitative and qualitative traits in tomato in vegetable research farm Hisar. Using Mahalanobis D 2 statistics method, the 27 genotypes were grouped into nine clusters, indicating the presence of diversity for different traits. The cluster I had the highest number containing 16 genotypes followed by cluster III and VII containing three and two genotypes respectively. However, the cluster II, IV, V, VI, VIII and IX were solitary. The maximum intra-cluster distance was recorded within cluster III (10.88) and the maximum inter-cluster distance between cluster VI and VII (20.80), indicating the existence of wide genetic variability. Based on mean performances, the cluster VIII with single genotype ranked first and appeared to contain the potential genotype.The cluster VIII and II registered high plant height. The genotypes included in clusters V and VIII took less number of days to 50% flowering (29.67). The cluster III registered high fruit yield per plant (1004.60), average fruit weight (38.07), and ascorbic acid (28.7) can be utilised in breeding programme for enhancing their respective characters. The cluster IX had high number of fruits per plant (40.53). Based on cluster mean analysis these genotypes can be used in crop improvement programme in tomato for above-mentioned characters.
2018
The present study was carried out during Rabi seasons of 2016-17 and 2017-18 at Main Experiment Station of Department of Vegetable Science, Narendra Deva University of Agriculture and Technology, Narendra Nagar (Kumarganj), Faizabad (U.P.) India. The experimental materials of the study comprised of 54 treatments of tomato [40 F1’s and 14 parental lines (10 lines viz., NDT-1, NDT-2, NDT-3, NDT-4, NDT-5, NDT-6, NDT-7, NDT-8, Azad T-6, Arka Saurabh and 4 testers viz., Pusa Ruby, Punjab Chhuhara, Arka Vikash and Arka Meghali]. The 14 parents were involved in a crossing programme to develop a line × tester set (10 lines + 4 testers + 40 F1’s). The experimental materials (40 F1’s and 14 parental lines) were evaluated in Randomized Complete Block Design (RBD) with three replication having each experimental unit with spacing of 60cm × 50cm with plot size of 1.2m ×3.0m.The observations were recorded on eighteen characters, viz., days to 50 % flowering, days to first fruit set, days to first ...
International Journal of Advanced Research in Biological Sciences (IJARBS), 2017
Tomato germplasm is a rich wellspring of Genetic differences. Examination work began from the month of March in NARC, Islamabad Pakistan. Spent very nearly Sixteen weeks here. Being a Plant Breeding and hereditary qualities understudy our principle center was on rearing and advancement of different assortments inside of the genotype. Right from the begin we were appointed to take a shot at Agro-Morphological Traits of Tomato. Every one of the examination with respect to Agro-Morphological Traits was completed to concentrate on the conduct Tomato's distinctive genotypes. Distinctive sorts of test were doing to perform examination work in innovative research centers of PMAS-AAUR. Every one of these regions of examination venture was profoundly fascinating. To sum things up, we got a fortune of commonsense information by doing this examination. The goal of the present study was to describe tomato germplasm through morphological attributes. This study will be useful for varietal improvement, hybrid seed creation and distinguishing proof of attractive genotypes from germplasm.
International Journal of Chemical Studies
The material for the present study comprised of 37 genotypes of tomato. The experiment was laid out in a randomized block design (RBD) with three replications for each treatment. Quantitative character were recorded such as plant height (cm), Number of primary branch, Days to 1 st flower, fruit weight (g), equatorial diameter (cm), polar diameter (cm), pericarp thickness (mm), locule number, fruit yield plant-1 (kg). On the basis of Analysis of variance, significant differences were observed among the genotypes for all the characters under study. The high (> 30%) Genotypic Coefficient of Variation (GCV) and Phenotypic Coefficient of Variation (PCV) were observed for yield per plant (i.e., 57.31% and 58.14%, respectively) followed by fruit weight (i.e., 35.27% and 35.49%, respectively). The presence of high GCV for fruit yield per plant and fruit weight suggested the possibility of improving and fixing these characters through employing selection breeding. high heritability (>60%) coupled with high genetic advance as per cent of mean (>20%) were evident for all the characters under study indicated possibility of improvement of those traits through selection due to existence of additive gene effect. From combined study of correlation and path analysis suggested the characters viz., polar diameter, number of primary branches and equatorial diameter found to be most important selection criteria in crop improvement of tomato.
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...
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.
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...
Journal of Horticultural Sciences
Evaluation of 35 genotypes of tomato for yield, quality and fruit characters under net-house revealed that PCV was higher than GCV for most traits. High heritability, with moderate to high GCV and genetic gain, was recorded for number of fruits per plant, yield per plant, fruit weight, number of fruit-clusters per plant, polar diameter and number of flower-clusters per plant indicating, that, these characters could be improved by simple selection. Total yield per plant had positive and highly significant correlation with number of fruit-clusters per plant, number of flowerclusters per plant and fruit weight. Number of locules per fruit showed positive and significant correlation with fruit weight and equatorial diameter but, significant negative correlation with polar diameter. Maximum direct contribution to total yield per plant was made by number of fruits per plant, followed by number of locules per fruit.