Agricultural Research Management Information System

Home
Research Summary
Search
About Us
- ARMIS
- Brochure
Contact Us
Report
User Request
Data Input
Help
- Operation Manual
  - PDF
  - Video
- Program Area & Commodity
We have reached 37600 number of research entries at this moment.

- Logout

Research Detail

Home
Research
Detail

Genetic Association and Path Coefficient Analysis Among Yield and Nutritional Traits of Tomato (lycopersicon Esculentum L.)

Shaila Sharmin
Department of Genetics and Plant Breeding, Bangladesh Agricultural University, Mymensingh-2202, Bangladesh

Afsana Hannan
Department of Genetics and Plant Breeding, Bangladesh Agricultural University, Mymensingh-2202, Bangladesh

Md Tahjib-Ul-Arif
Department of Biochemistry and Molecular Biology, Bangladesh Agricultural University, Mymensingh-2202, Bangladesh

G H M Sagor
Department of Genetics and Plant Breeding, Bangladesh Agricultural University, Mymensingh-2202, Bangladesh

Abstract/ Executive Summary:

The present study was conducted following randomized complete block design with three replications to evaluate the genetic variability of twenty five tomato genotypes for yield and nutritional traits and also their attributing factors. A wide range of variation was observed among the characters studied which have a great interest for tomato breeders. Heritability in broad and narrow sense for soluble solid in green and red tomato, total phenolic content, fruit diameter and seed/fruit was 93.23%, 98.58%, 99.92%, 99.37% and 96.15% respectively and for those traits, phenotypic influence was negligible. Leaf chlorophyll content and total phenolic content showed positive significant correlation with soluble solid (sugar) whereas pH showed negative correlation. Yield/plant was found highly significant and positively correlated with individual fruit weight, fruit diameter, seed/fruit, and plant height whereas soluble solid, leaf chlorophyll content, total phenolic content showed negative correlation. Path analysis revealed that soluble solid had positive direct effect with leaf chlorophyll content, pH of fruit juice and days to first flowering and negative direct effects with individual fruit weight, fruit diameter, plant height, fruit /bunch, whereas yield/plant showed positive direct effects with all above traits except soluble solids in red tomato, which clearly indicate inverse correlation between yield and nutritional components of tomato fruit. Further, principal component analysis found that four principal components contributed 75.1% of the total variability. Individual fruit weight, days to first flowering, pH of fruit juice, fruit/bunch and soluble solids in fruits were found to be the most important traits in PC1, PC2, PC3, PC4 and PC5, respectively. As soluble solid content, yield and its component traits have high heritability, therefore, improvement is also possible using breeding approaches.

Keywords: Tomato, Yield and contributing traits, soluble solid (sugar), Path analysis, Principal Components, organoleptic

Location: Department of Genetics and Plant Breeding, Bangladesh Agricultural University (BAU), Mymensingh

Start Date: 00-10-2017

End Date: 00-03-2018

Program Area: Variety and Species

Commodity: Tomato

Objectives:

The study was undertaken to determine the genetic association between different morphological and nutritional traits for further development and selection of superior nutritional rich high yielding tomato genotypes

Methodology:

The experiment was conducted at the experimental field, Department of Genetics and Plant Breeding, Bangladesh Agricultural University (BAU), Mymensingh during winter season (October 2017 to March 2018) on an upland soil. The experimental site was situated in the sub tropical climate zone, characterized by heavy rainfall during the months from May to September and scanty rainfall in the rest of the year. The experimental material consisted of 21 advanced tomato genotypes (Tm-131, Tm-134, Tm-181, Tm-206, Tm-219, Tm-299, Tm-337, V100589, V1005582, V1006484, V1006282, V1006015, V1057583, V100686, V1007282, V1005584, C-11, C-71, WP-7, Homeastid) and 4 varieties (BINA tomato 4, BINA tomato 8, BINA tomato 9 and BINA tomato 10) were planted in healthy plot to assess different yield and nutritional quality attributing traits. The experimental seed material was sown in pots on 10 October, 2017 and 30 days old seedlings were transplanted to the main field on 10 November, 2017 with spacing of 60 cm x 40 cm. Before transplanting the plot was brought to fine tilth by ploughing and harrowing. The recommended doses of fertilizers such as cowdung (10,000 kg/ha), Urea (250 kg/ha), TSP (250 kg/ha) and MP (150 kg/ha) were applied during cultivation. The experiment was conducted using Randomized Complete Block Design (RCBD) with three replications. Correlation, path analysis and principal component analysis were computed with the help of computer software MSTATC (Genetic analysis) , BASICA (path coefficient analysis) and Minitab 17 (PCA analysis) following the techniques suggested by Johnson et al. (1955); Hanson et al. (1956); Miller et al., (1991) and Lynch and Walsh (1998).

Source of Information: J Bangladesh Agril Univ 17(2): 187–193, 2019

Article Link (Online Journal): https://doi.org/10.3329/jbau.v17i2.41942

Funding Source:

Total Budget (Tk.) :

Achievement/Findings:

The characters showing high direct effect on yield/plant and soluble solid indicated that direct selection for these traits might be effective and there is a possibility of improving yield/plant and soluble solid in tomato through selection based on these characters. By analyzing seventeen different morphological and organoleptic characters, the presence of wide diversity among the genotypes was found. It was observed from the study of heritability, genetic advance, correlation coefficient, path coefficient analyses and principal component analysis that the individual fruit weight and diameter was the most important character related to the yield/plant than other traits; whereas, chlorophyll content and total phenolic content was the most important trait for soluble solids, although there is a bit inverse relations between soluble solids and yield/plant. The genotypes exhibited moderate to higher fruit yield with soluble solid (sugar) and other desirable traits; hence these are suggested to test under potential areas for identification of best cultivar for general cultivation. This analysis could be beneficial for the further breeding program for utilizing the genotypes and for effective selection for boosting yield and flavor in tomato.

Knowledge Management: