Assessment of genetic variability and heritability of vegetative, floral and fruit traits in tomato (Solanum lycopersicum L.)
DOI:
https://doi.org/10.55627/zoobotanica.003.03.1744Keywords:
Tomato, genetic variability, heritability, morphological characterization, coefficient of variationAbstract
Genetic diversity is crucial for tomato (Solanum lycopersicum L.) improvement. To assess this variability, a field experiment was conducted using eleven tomato varieties arranged in randomized complete block design with five replications. This study was designed to estimate genetic parameters for 19 vegetative and reproductive traits. Statistical analysis revealed significant differences among the genotypes for the majority of the traits, confirming the presence of substantial genetic diversity. The estimates of genotypic and phenotypic coefficients of variation (GCV and PCV) were highest for pulp weight and leaf rachis length, indicating a strong inherent genetic potential for selection. Fruit length recorded the highest genotypic (85.88) and phenotypic (104.44) variances. Heritability estimates were high for most traits crucial for yield, with the maximum value observed for fruit length (0.82). The combination of a pronounced level of heritability and substantial expected genetic advance for these traits appears to suggest that their expression is primarily controlled by gene action. Therefore, future breeding programs should prioritize direct selection for characters such as fruit length, pulp weight, and leaf architecture to achieve rapid genetic gain and enhance tomato yield productivity.
References
Arber, A. (1950). The natural philosophy of plant form. Cambridge University Press, Cambridge.
De Mori, G. and Cipriani, G. (2023). Marker-assisted selection in breeding for fruit trait improvement: a review. International Journal of Molecular Sciences, 24: 8984.
de Vicente, M.C. and Tanksley, S.D. (1993). QTL analysis of transgressive segregation in an interspecific tomato cross. Genetics, 134: 585–596.
Fadhilah, A.N., Farid, M., Ridwan, I., Anshori, M.F. and Yassi, A. (2022). Genetic parameters and selection index of high-yielding tomato F₂ populations. SABRAO Journal of Breeding and Genetics, 54: 1026–1036.
Falconer, D.S. and Mackay, T.F.C. (1996). Introduction to quantitative genetics. Longman, Essex.
Frary, A., Fritz, A., Lisa, A.F. and Tanksley, S.D. (2004). A comparative study of the genetic bases of natural variation in tomato leaf, sepal and petal morphology. Theoretical and Applied Genetics, 109: 523–533.
Frary, A., Fulton, T.M., Zamir, D. and Tanksley, S.D. (2004). Advanced backcross QTL analysis of a Lycopersicon esculentum × L. pennellii cross and identification of possible orthologs in the Solanaceae. Theoretical and Applied Genetics, 108: 485–496.
Huang, S., Gao, Y., Li, Y., Xu, L., Tao, H. and Wang, P. (2016). Influence of plant architecture on maize physiology and yield in the Heilonggang River valley. The Crop Journal, 5: 52–62.
Islam, M.S. and Khan, S. (1991). Variability and character association in tomato (Lycopersicon esculentum Mill.). Bangladesh Journal of Plant Breeding and Genetics. 4(1-2): 49-53.
Kaundal, M., Sharma, K. and Anand, H. (2024). Processing, value addition and post-harvest technology of tomato: a scoping review on global and Indian perspectives. Journal of Advances in Biology & Biotechnology, 27: 339–347.
Kavya, E., Saidaiah, P., Sivaraj, N., Geetha, A. and Komatireddy, R. (2021). Study of genetic variability, heritability and genetic advance for yield and yield parameters in tomato (Solanum lycopersicum L.) germplasm. Journal of Pharmacognosy and Phytochemistry, 10(1): 768–771.
Kumar, R., Das, S.P., Choudhury, B.U., Kumar, A., Prakash, N.R., Verma, R. and Mishra, V.K. (2024). Advances in genomic tools for plant breeding: harnessing DNA molecular markers, genomic selection and genome editing. Biological Research, 57: 80.
Kwon, S.H. and Torrie, J.H. (1964). Heritability and interrelationship among traits of two soybean populations. Crop Science, 4: 196–198.
Rasheed, A., Ilyas, M., Khan, T.N., Mahmood, A., Riaz, U., Chattha, M.B., Al Kashgry, N.A.T., Binothman, N., Hassan, M.U., Wu, Z. and Qari, S.H. (2023). Study of genetic variability, heritability and genetic advance for yield-related traits in tomato (Solanum lycopersicum Mill.). Frontiers in Genetics, 13: 1092201.
Rowland, S.D., Zumstein, K., Nakayama, H., Cheng, Z., Flores, A., Chitwood, D.H., Maloof, J.N. and Sinha, N.R. (2020). Leaf shape is a predictor of fruit quality and cultivar performance in tomato. New Phytologist, 226: 851–865.
Shashikanth. (2008). Genetic variability studies in tomato (Solanum lycopersicum Mill.). M.Sc. (Hons.) Agri. Thesis, University of Agricultural Sciences, Dharwad, India.
Singh, P., Bala, S. and Verma, S.B. (2022). PCV, GCV, heritability (broad sense) and genetic advance present in tomato germplasm with respect to yield and its component characters. Environment and Ecology, 40: 571–576.
Steel, R.G.D., Torrie, J.H. and Dickey, D.A. (1997). Principles and procedures of statistics: a biometrical approach. McGraw-Hill, New York.
Tufail, T., Bader Ul Ain, H., Noreen, S., Ikram, A., Arshad, M.T. and Abdullahi, M.A. (2024). Nutritional benefits of lycopene and beta-carotene: a comprehensive overview. Food Science & Nutrition, 12: 8715–8741.
van der Knaap, E. and Tanksley, S.D. (2003). The making of a bell pepper shaped tomato fruit: identification of loci controlling fruit morphology in Yellow Stuffer tomato. Theoretical and Applied Genetics, 107: 139–147.
Wu, R.L. (2000). Quantitative genetic variation of leaf size and shape in a mixed diploid and triploid population of Populus. Genetic Research, 75: 215–222.
Younas, H., Sadozai, K.N., Ali, A. and Ahmad, R. (2024). Technical efficiency and economic analysis of tomato production in Khyber Pakhtunkhwa: a stochastic frontier approach. Sarhad Journal of Agriculture, 40: 928–942.
Zannat, A., Hussain, M.A., Abdullah, A.H.M., Hossain, M.I., Saifullah, M., Safhi, F.A. and Hossain, M.S. (2023). Exploring genotypic variability and interrelationships among growth, yield and quality characteristics in diverse tomato genotypes. Heliyon, 9: e18854.
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