Variability and Character Association in F2 Segregating Population of Different Commercial Hybrids of Tomato (<i>Solanum lycopersicum</i> L.)

Abstract

ABSTRACT:The F2 segregating generations of exotic tomato hybrids were studied to measure variability, character association and path coefficient analysis. Analysis of variance for each trait showed significant differences among the genotypes. Very little differences were observed between phenotypic coefficients of variation (PCV) and genotypic coefficients of variation (GCV) for the traits days to first flowering (pcv=9.21, gcv=7.82), fruit length (pcv=17.14, gcv=14.84) and fruit diameter (pcv=17.10, gcv=14.92). High heritability (>50%) was observed for all the yield contributing characters except flowers per cluster (47.83%). High heritability associated with high genetic advance was observed for fruit clusters per plant (105.11), fruits per plant (103.43), branches per plant (34.49), fruits per cluster (47.43), individual fruit weight (77.73) and fruit yield per plant (108.25). Selection for such traits might be effective for the fruit yield improvement of tomato. Significant positive genotypic and phenotypic correlation was observed between plant height at first flowering, flowers per plant, fruits per cluster, fruit clusters per plant, fruits per plant with fruit yield per plant. Fruits per plant showed the highest positive direct effect (1.096) on fruit yield per plant followed by individual fruits per plant (0.674). Direct selection may be executed considering these traits as the main selection criteria to reduce indirect effect of the other characters during the development of high yielding tomato variety. @ JASEM

Genetic Analysis of F2 Population of Tomato for Quantitative Traits in the Cross Bushbeef X Nagina

“…Analyzed data showed that variance of genotype (Vg) was lower than the variance of phenotype (Vp) in the F2 populations for all the traits under study. Same were the findings of Mohamed et al [12] and Gosh et al [13] except for fruit-length and fruit diameter in his study .In the F2 population higher difference was noted between Vg and Vp for the traits Flowers/cluster, Fruits/cluster, Fruit weight, fruits/ plant and Yield/plant while lower difference was found between Vg and Vp for the traits like Fruit diameter and Fruit length as shown in table-1. High difference between Vg and Vp indicates that environment has more contribution in the phenotypic appearance of the traits than their genetic make-up.…”

Population Parameters and Path-Coefficient Analysis of Tomato Grown under Heat Stress

“…Heritability coefficient was found to be high for all studied traits including yield/ Plant and its components under heat stress condition (Rashwan, 2016). Similar values of heritability were also noticed by several authors among them (Ghosh 2010;Jiregna et al 2011;Kamel et al 2010).…”

Character Association and Path Coefficient Analysis in Tomato (Solanum lycopersicum L.)

“…The number of fruits per plant (0.753, 0.855) had highest positive direct effect on the fruit yield followed by average fruit weight ( Number of fruits per plant exhibited positive direct effect on fruit yield as reported by Singh et al, (2006), Ara et al, (2009), Ghosh et al, (2010 and Ullah et al, (2015). Similarly, Singh et al, (2006), Ara et al, (2009), Dar et al, (2011 and Tiwari et al, (2013) also reported that average fruit weight exerted positive direct effect on fruit yield.…”