Greetty Williams https://orcid.org/0000-0001-6296-7725 Anbuselvam Yesudhas


Most of the tomato genotypes are inbred in nature, indicating the need to assess and characterize germplasm accessions as they are the reserve for genotypes with desired traits. Documentation on morphological traits is quite informative in tomato breeding programs since higher levels of diversity on morphological traits are associated with genotypes with lower genetic diversity when assessed using molecular markers. The present investigation aimed to evaluate morphological diversity in tomato germplasm accessions. Morphological characterization was performed in 104 genotypes acquired from various sources. Thirty-three morphological traits, such as seedling, plant, inflorescence and fruit, were scored based on the tomato descriptors. Out of 33 characters studied, 26 traits exhibited diverse modalities, 4 traits exhibited varied classes in genotypes and 3 traits did not show any variants. Qualitative characterization highlighted greater variability among genotypes, as witnessed by their diverse modalities for each trait. The collected data was subjected to Agglomerative Hierarchical Clustering following Ward’s method. Cluster analysis and dendrogram construction displayed genetic diversity's richness in the germplasm accessions. Cluster analysis placed these 104 genotypes in six clusters. The largest cluster comprised 55 genotypes, whereas the smallest cluster had three. Agglomerative Hierarchical Clustering helped to find similarities between genotypes. This efficiently assigned genotypes into groups and thus provided guidelines for parental selection in tomato hybridization and breeding programmes. 




Clustering, Germplasm, Morphological characterization, Parental selection, Variability

Agrawal, T., Hirons, M. & Gathorne-Hardy, A. (2021). Understanding farmers' cropping decisions and implications for crop diversity conservation: Insights from Central India. Current Research in Environmental Sustainability 3, 100068.
Barrett, D.M., Beaulieu, J.C. & Shewfelt, R. (2010). Color, flavor, texture, and nutritional quality of fresh-cut fruits and vegetables: desirable levels, instrumental and sensory measurement, and the effects of processing. Critical Reviews in Food Science and Nutrition 50, 369-389.
Bauchet, G. & Causse, M. (2012). Genetic diversity in tomato (Solanum lycopersicum) and its wild relatives. Genetic Diversity in Plants 8, 134-162.
Bergougnoux, V. (2014). The history of tomato: from domestication to biopharming. Biotechnology Advances 32, 170-189.
Bhattarai, K., Louws, F.J., Williamson, J.D. & Panthee, D.R. (2016). Diversity analysis of tomato genotypes based on morphological traits with commercial breeding significance for fresh market production in eastern USA. Australian Journal of Crop Science 10, 1098-1103.
Cebolla-Cornejo, J., Roselló, S. & Nuez, F. (2013). Phenotypic and genetic diversity of Spanish tomato landraces. Scientia Horticulturae 162, 150-164.
Chen, K.Y., Cong, B., Wing, R., Vrebalov, J. & Tanksley, S.D. (2007). Changes in regulation of a transcription factor lead to autogamy in cultivated tomatoes. Science 318, 643-645.
García-Gusano, M., García-Martínez, S. & Ruiz, J.(2004). Use of SNP markers to genotype commercial hybrids and Spanish local cultivars of tomato. Tomato Genet Coop Rep 54, 12-15.
Hui, F., WANG, W.-h., Na, X., Bo, L., ZHANG, T. & CHEN, H. (2008). Inheritance of several plant type characters in truss tomato. Agricultural Sciences in China 7, 535-541.
IPGRI, 1996. Descriptors for Tomato (Lycopersicon Spp.). Bioversity International.
Jin, F., Xue, J., Jia, Y. & Liu, Z. (2006). The cluster analysis on tomato germplasms. Acta Agri. Boreali-Sin 21, 49-54.
Jomova, K. & Valko, M. (2013). Health protective effects of carotenoids and their interactions with other biological antioxidants. European Journal of Medicinal Chemistry 70, 102-110.
Kalloo, G. (2012). Genetic improvement of tomato. Springer Science & Business Media.
Kenneth, O. (2016). Agro-morphological and nutritional characterization of tomato landraces (Lycopersicon species) in Africa. University of Nairobi.
Khachik, F., Carvalho, L., Bernstein, P.S., Muir, G.J., Zhao, D.Y. & Katz, N.B. (2002). Chemistry, distribution, and metabolism of tomato carotenoids and their impact on human health. Experimental Biology and Medicine 227, 845-851.
Kotsanopoulos, K.V. & Uddin, M.N. (2022). Authenticity of Tomato. Authenticity of Foods of Plant Origin. CRC Press, pp. 83-104.
Kulus, D. (2022). Genetic diversity for breeding tomato. Cash Crops: Genetic Diversity, Erosion, Conservation and Utilization, 505-521.
Mata-Nicolás, E., Montero-Pau, J., Gimeno-Paez, E., Garcia-Carpintero, V., Ziarsolo, P., Menda, N., Mueller, L.A., Blanca, J., Cañizares, J. & Van der Knaap, E. (2020). Exploiting the diversity of tomato: the development of a phenotypically and genetically detailed germplasm collection. Horticulture Research 7.
Paran, I. & Van Der Knaap, E. (2007). Genetic and molecular regulation of fruit and plant domestication traits in tomato and pepper. Journal of Experimental Botany 58, 3841-3852.
Peralta, I.E. & Spooner, D.M.(2007). History, origin and early cultivation of tomato (Solanaceae). Genetic Improvement of Solanaceous crops 2, 1-27.
Rick, C. & Holle, M. (1990). Andean Lycopersicon esculentum var. cerasiforme: genetic variation and its evolutionary significance. Economic Botany 44, 69-78.
Saini, R.K., Nile, S.H. & Park, S.W. (2015). Carotenoids from fruits and vegetables: Chemistry, analysis, occurrence, bioavailability and biological activities. Food Research International 76, 735-750.
Salim, M.M.R., Rashid, M.H., Hossain, M.M. & Zakaria, M. (2020). Morphological characterization of tomato (Solanum lycopersicum L.) genotypes. Journal of the Saudi Society of Agricultural Sciences 19, 233-240.
Saltveit, M.E. (2005). Fruit ripening and fruit quality. Tomatoes. Cabi Publishing Wallingford UK, pp. 145-170.
Shoba, D., Vijayan, R., Robin, S., Manivannan, N., Iyanar, K., Arunachalam, P., Nadarajan, N., Pillai, M.A. & Geetha, S. (2019). Assessment of genetic diversity in aromatic rice (Oryza sativa L.) germplasm using PCA and cluster analysis. Electronic Journal of Plant Breeding 10, 1095-1104.
Sušić, Z., Zdravković, J., Pavlović, N. & Prodanović, S. (1999). Selecting features for estimating genetic divergence of tomato genotypes (Lycopersicum esculentum Mill.). Genetika 31, 235-244.
Tieman, D., Zhu, G., Resende Jr, M.F., Lin, T., Nguyen, C., Bies, D., Rambla, J.L., Beltran, K.S.O., Taylor, M. & Zhang, B. (2017). A chemical genetic roadmap to improved tomato flavor. Science 355, 391-394.
Traore, C.O., Tarpaga, W.V., Bourgou, L. & Rouamba, A. (2019). Agromorphological evaluation within a collection of local tomato (Solanum lycopersicum L.) populations collected in Burkina Faso and Mali. African Journal of Agricultural Research 14, 1726-1736.
Vats, S., Bansal, R., Rana, N., Kumawat, S., Bhatt, V., Jadhav, P., Kale, V., Sathe, A., Sonah, H. & Jugdaohsingh, R. (2022). Unexplored nutritive potential of tomato to combat global malnutrition. Critical Reviews in Food Science and Nutrition 62, 1003-1034.
Vishwanath, K., Prasad, R., Hm, P. & Kpr, P. (2014). Characterization of tomato cultivars based on
morphological traits. Annals of Plant Sciences, 3 (11), 854-862
Zhang, Q., Zhang, X., Zheng, Q., Yao, M. & Yang, Z. (2022). Characteristics of compound low-temperature and limited-light events in southern China and their effects on greenhouse grown strawberry. Theoretical and Applied Climatology 150, 155-165.
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Qualitative characterization and clustering in tomato (Solanum lycopersicum L.) germplasm accessions. (2023). Journal of Applied and Natural Science, 15(3), 900-907. https://doi.org/10.31018/jans.v15i3.4523
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Qualitative characterization and clustering in tomato (Solanum lycopersicum L.) germplasm accessions. (2023). Journal of Applied and Natural Science, 15(3), 900-907. https://doi.org/10.31018/jans.v15i3.4523