A study on the genetic diversity in tomato (Solanum lycopersicum L.) under Agro-climatic condition of Kanpur

Abstract

The selection of the best cultivars can be helped by the significant positive relationship between crop path correlation and phenotypic and genotypic performance. It was used in our study due to the significant importance of these factors. For this an experiment was conducted on different genotypes of tomato during 2022-23, with the aim ofestimate phenotypic and genotypic correlation between fruit yield and its contributing traits and to estimate direct and indirect effects of yield components on fruit yield. The experimental material for the study consisted of 18 genotypes including one check (Kashi Aman), laid in Randomized Complete Block Design with three replications. Observations were recorded on thirteen quantitative characters. The most important trait fruit yield per plant had exhibited highly significant and positive phenotypic correlation with marketable fruit yield per plant (0.934), followed by average fruit weight (0.786), equatorial diameter (0.528). Marketable fruit yield per plant, average fruit weight and equatorial diameter were found significantly a positively correlated among themselves. The higher magnitude of positive direct effect on fruit yield per plant was exerted by marketable fruit yield per plant (0.635) followed by average fruit weight (0.348). The higher magnitude of negative direct effect on fruit yield per plant was exerted by equatorial diameter (-0.011). While maximum positive indirect effect on total fruit yield per plant shown by marketable fruit yield per plant (0.378), followed by equatorial diameter (0.329). while negative indirect effect shown by polar diameter (-0.148) followed by number of fruits per cluster (-0.127).Thus, it can be inferred from the data above that selecting for these qualities will effectively enhance the crop for increased production and contributing traits.