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Character Association and Path Analysis of Tomato (solanumlycopersicuml.)

Md. Sarowar Alam
Regional Agricultural Research Station (RARS), BARI, Akbarpur, Moulvibazar, Bangladesh

Md. Nurul Huda
Department of Genetics and Plant Breeding, Bangabandhu Sheikh MujiburRahman Agricultural University, Gazipur, Bangladesh

Md. Sadiqur Rahman
Regional Agricultural Research Station (RARS), BARI, Akbarpur, Moulvibazar, Bangladesh

A.K.M. Azad
Bangladesh Forest Research Institute, Moulvibazar, Bangladesh

Md. Mizanur Rahman
Regional Agricultural Research Station (RARS), BARI, Akbarpur, Moulvibazar, Bangladesh

Mohammad Mainuddin Molla
Regional Agricultural Research Station (RARS), BARI, Akbarpur, Moulvibazar, Bangladesh

Abstract/ Executive Summary:

The study was conducted at the vegetables research field and laboratory of the Regional Agricultural Research Station, Akbarpur, Moulvibazar, Bangladesh to find out the inter-relationship among the characters studied. Correlation and path analysis was executed in twenty-three tomato genotypes for thirteen yield contributing characters. The correlation coefficients were ascertained to detect the studied character interrelationships. Yield (t/ha) was showed positive and highly significant correlated with yield per plant (r =0.99) followed by individual fruit weight (r =0.72), fruit breadth (r =0.67), number of locules per fruit (r =0.67) and pericarp thickness (r =0.66) which indicated that yield could be enhanced by improving these traits. Path coefficient analysis indicated the cause and effect relationship among yield (t/ha) and its components. Yield per plant exhibited the highest positive direct effect (1.018) on yield (t/ha) followed by the number of flowers per inflorescence (0.212) and pericarp thickness (0.155). Fruit breadth (-0.279) showed the highest negative direct effect on yield (t/ha) but it had a highly significant positive correlation with Yield (t/ha) (r=0.67). High direct effect on yield (t/ha) was revealed by the characters that indicated direct selection in favor of these traits might be feasible. Selection based on these characters has great potential for improving yield (t/ha). The studied characters explained almost all variability towards yield signified by considerably very low residual effect (0.004606).

Keywords: Tomato, Correlation analysis, Path-coefficients analysis, Traits, Direct effect.

Location: At the vegetables research field and laboratory of the Regional Agricultural Research Station, Bangladesh Agricultural Research Institute, Akbarpur, Moulvibazar, Bangladesh

Start Date: 00-10-2014

End Date: 00-04-2015

Program Area: Variety and Species

Commodity: Tomato

Objectives:

Present research work has been conducted to study the correlation and path coefficient analysis to estimate associations among desired traits and their direct and indirect contributions toward yield.

Methodology:

The experiment was conducted at the vegetables research field and laboratory of the Regional Agricultural Research Station, Bangladesh Agricultural Research Institute, Akbarpur, Moulvibazar, Bangladesh during October 2014 to April 2015. Twenty three tomato genotypes were used in the present study and the experiment was laid out in randomized complete design with 3 replications. The unit plot size was 4.8m × 1.0m. Seeds were sown on 25 October 2014 and 31 days old seedlings were transplanted in the main field on 25 November, 2014 maintaining 60 cm × 40 cm plant spacing. Manure and Fertilizers were applied @ 10 ton well decomposed cow dung, 550 kg Urea, 450 kg TSP and 250 kg MP, Gypsum 121 kg, Zinc sulphate 15 kg and Boric acid 12 kg per hectare. Half of the quantity of cow dung, half amount of TSP and entire amount of gypsum and boric acid were applied during land preparation. The remaining half of cow dung and TSP was applied during pit preparation before a week of planting. The entire urea and MP were applied in 3 equal installments at 21, 35 and 50 days after transplanting. Irrigation, intercultural operation and pest management were done as and when necessary. Data on plant height (cm), days for 50% flowering, number of flowers per inflorescence, number of fruits per cluster, individual fruit weight (g), fruit length (cm) and diameter (cm),pericarp thickness (cm), number of locules per fruit, number of fruits per plant, number of seeds per fruit, % Brix (TSS), yield per plant (kg.) and yield (t/ha) were recorded. The correlation coefficients were calculated as per Snedecor (1957). Path coefficients were estimated according to Dewey and Lu (1959), where yield (t/ha) was kept as resultant variable and other contributing characters as causal variables. Correlation and Path analysis were conducted by using R (version 3.1.2) computer software (R Core Team, 2014).

Source of Information: Biosci. Agric. Res. 22(01): 1815-1822

Article Link (Online Journal): https://doi.org/10.18801/jbar.220119.223

Funding Source:

Budget:

Total Budget (Tk.) :

Achievement/Findings:

Fruits yield per plant, number of flowers per inflorescence, pericarp thickness and individual fruit weight were the most important contributors to yield (t/ha) in tomato. Thus, emphasis should be given for the selection of these characters for the development of high yielding with quality rich tomato varieties.

Knowledge Management: Journal