Genetic Associations Analysis for Fruit Yield and Its Contributing Traits of Indeterminate Tomato (Solanum lycopersicum L.) Germplasm under Open Field Condition

Abstract

The study was initiated to generate genetic information on characters associations for tomato germplasm under open field condition. Nineteen indeterminate tomato germplasm were evaluated to estimate the nature and magnitude of associations of different characters with fruit yield and among themselves at Vegetable Research Farm, Department of Horticulture, SHIATS, Allahabad (India) during 2012-2013. The experiment was conducted using a Randomized Complete Block Design (RCBD) with three replications. Estimates of genetic parameters revealed that fruit yield was significantly and positively correlated with number of flowers per plant (0.2894 and 0.2891) followed by number of fruits per plant (0.4480 and 0.4486) and fruit weight (0.6223 and 0.6230) at genotypic and phenotypic level, respectively, strong association of these traits revealed that the selection based on these traits would ultimately improve the fruit yield and it is also suggested that hybridization of genotypes possessing combination of above characters is most useful for obtaining desirable high yielding segregation. In order to obtain a clear picture of the inter relationship between fruit yield per plant and its components, direct and indirect effects were measured using path coefficient analysis. Fruit weight had a very high positive direct genotypic and phenotypic effect 0.9566 and 0.9442, respectively on fruit yield per plant followed by number of flowers per plant, fruit set per cent, number of fruits per plant, TSS o Brix, plant height, radial diameter of fruit, leaf curl incidence per cent and days to 50% flowering. The characters showed high direct effect on yield per plant indicated that direct selection for these traits might be effective and there is a possibility of improving yield per plant through selection based on these characters. Residual effect was considerably low (0.0611 and 0.0751) which indicated that characters included in this study explained almost all variability towards yield.

Genetic analysis of agronomic and biochemical variables among different tomato (Solanum lycopersicum L.) accessions

“…Ascorbic acid (mg/100 g) showed significant and positive association with number of fruits plant -1 , fruit set percentage and TSS at genotypic and phenotypic level. The result was in full agreement with earlier studies by Meena and Bahadur (2015b) for TSS. Path coefficient analysis: Yield is the sum total of the several component characters which directly or indirectly contributed to it.…”

“…This is in agree-ment with the results found by Ogwulumba and Ugwuoke (2013) genotypic and phenotypic level, indicating that fruit yield may be obtained in an indirect manner with selection for increase in the number of fruits per plant. Similar types of findings were also reported by Das et al (1998), Haydar et al (2007), Hidayatullah et al (2008), Islam et al (2010), for fruit yield plant -1 , Meena and Bahadur (2015b) for fruit set percentage and fruit yield plant -1 . Its association with the character like fruit weight, radial diameter of fruit and leaf curl incidence was negative and significant which indicated that as the number of fruits increases, the individual fruit weight and radial diameter would decreases.…”

“…Hence, path coefficient analysis was used to make partition of the correlation coefficient of the different characters studied to know direct and indirect effects on yield. The information obtained helps in giving proper weightage to the various characters during selection or other breeding programme so that the improvement of desirable traits can be achieved effectively (Bhatt, 1973;Meena and Bahadur, 2015b). The results of the present investigation on path coefficient analysis as presented in Table 4 revealed that fruit weight had a very high positive direct genotypic and phenotypic effect 1.1298 and 1.1116, respectively on fruit yield plant -1 (Fig.…”

Exploring the breeding potential of Mexican tomato landraces

“…Previous studies have reported that positive association between yield and total number of fruits per plant is frequently detected on populations derived from different parental germplasm. Meena and Bahadur (2015) observed on indeterminate tomato that yield had a low correlation with total number of fruits per plant (0.19). However, McGiffen et al (1994), in processing tomato, reported a higher positive correlation value between yield and total number of fruits per plant (r = 0.76).…”

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

“…Sewall Wright (1921) is considered the first one that applied path analysis technique in genetics to quantify interrelationships, while the first application of this technique in breeding reported by Dewey and Lu (1959). In spite of much previous studies on path analysis in plant breeding and the appraisal of the available literature on tomato (Maurya et al 2011;Manoj 2011;Roa et al 2013;Pemba et al 2014;Meena and Bahadur 2015), this investigation is the first report applying path analysis to describe the cause and effect of electrolytes leakage on yield as a form of indirect selection for heat tolerance in tomato. According to our results, it could be recommended that the utilization of electrolytes leakage in tomato as indirect selection in early stage of plant development for discover the promising genotypes and discard the susceptible ones.…”