Nwosu et al Greener Journal of Agricultural Sciences Vol. 4 (5), pp. 211-219, June 2014. ISSN: 2276-7770 Research Paper Manuscript Number: 031014141 DOI: http://dx.doi.org/10.15580/GJAS.2014.5.031014141 Genetic Variability and Correlations in Rainfed Tomato (Solanum spps.) Accessions in Ibadan, Nigeria Nwosu D.J.*1, Onakoya O.A.1, Okere A.U.1, Babatunde A.O.1and Popoola A.F.2 1National Centre for Genetic Resources and Biotechnology, P.M.B. 5382, Moor Plantation, Ibadan, Nigeria. 2Department of Soil Science, Federal University of Technology, Minna.Niger state, Nigeria. *Corresponding Author’s Email: email@example.com Abstract: The extent of genetic variability among 19 accessions of tomato (Solanum spp.) was studied using genetic variability parameters as a basis for harnessing of the crop. Four weeks old seedlings were transplanted in a well levelled field with 0.6 x 0.6 spacing and replicated three times in randomized complete block design. High significant differences among the accessions for all attributes studied. Cluster analysis based on 37 agro-mophological attributes separated accessions into two distinct groups according to the fruit types i.e. cherry and classic fruit types. Values for genotypic and phenotypic coefficients of variation showed variability among the accessions. Correlation analysis showed fruit per plant is positively and significantly correlated to plant height, number of branches per plant and leaf length. Very high genetic advance and heritability estimates for leaf length, leaf width, days to flower, days to 50% flowering, number of fruits per plant, fruit length, fruit diameter, fruit weight and 1000 seed weight suggest simple inheritance system and thus amenability for these attributes to selection in tomato improvement. Keywords: Tomato, attributes, variance, heritability, genetic advance, inheritance. Return to Content View [Full Article – PDF] [Full Article – HTML] [Full Article – Epub] Reference: Agarwal S and Rao A (2000). Tomato lycopene and its role in human health and chronic diseases. CMAJ 163(6):739-44. Akanbi CT and Oludemi FO (2003). Effect of processing and packaging on the lycopene content of tomato products. International Journal of Food Production 7:139-151. Eid MH (2009). Estimation of heritability and genetic advance of yield traits in wheat (TriticumaestivumL.) under drought conditions.International Journal of Genetics and Molecular Biology 1(7): 115- 120. FAOSTAT (2010). Food and Agricultural Commodities Production; Available online: http://faostat.fao.org (accessed 21 July 2012). Fehmida A and Ahmad SD (2007).Morphological comparisons of three tomato cultivars from Azad Jammu and Kashmir, Pakistan.Sarhad Journal of Agriculture 23 (2): 313-318. Fufa H, Baenziger PS, Beecher I, Dweikat V, Graybosch RA and Eskridge KM (2005).Comparison of phenotypic and molecular marker-based classifications of hard red winter wheat cultivars.Euphytica 145: 133-146. Hidayatullah S, Ahmed J, Ghafoor A and Mahmood T (2008).Path coefficient analysis of yield components in tomato (Lycopersiconesculentum).Pakistan Journal of Botany 40(2): 627-635. Hu X, Wang H, Chen J and Yang W (2012).Genetic diversity of Argentina tomato varieties revealed by morphological traits, simple sequence repeat, and single nucleotide polymorphism markers.Pakistan Journal of Botany 44(2): 485-492. IBPGR (1997).Descriptors for tomato (Lycopersicom spp.).International Board for Plant Genetic Resources. Rome, Italy, pp. 24-36. Johnson HE, Robinson HF and Comstock RE (1955).Estimates of genetic and environmental variability in soyabean.Agronomy Journal47: 314-318. Kanyomeka L and Shivute B (2005). Influence of pruning on tomato production under controlled environments. AgriculturaTropicaetSubtropica 32(2): 79-81 Kwon YS, Park SG and Yi SY (2009).Assessment of genetic variation among commercial tomato (Solanumlycopersicum L.) varieties using SSR markers and morphological characteristics.Gene and Genomics 31(1): 1-10. Mohanty BK (2002). Studies on variability, heritability inter relationship and path analysis in tomato. Annals of Agricultural Research 2(1): 65-69. Mohammed SM, Ali EE and Mohamed TY (2012).Study of heritability and geneticvariability among different plant and fruit characters of tomato (SolanumlycopersiconL.).International Journal of Scientific & Technology Research 1(2): 55-58. National Centre for Genetic Resources and Biotechnology (NACGRAB) and National Agriculture Seed Council (NASC) (2013) Catalogue of crop varieties released and registered in Nigeria. Volume 5. Iowa State University, USA. Parnse, MC (1957). Genetics of quantitative characters in relation to plant breeding.Indian Journal of Genetics. 17: 318-328. Sainju MU, Dris R and Singh B (2003).Mineral nutrition of tomato.Food Agriculture & Environment 1 (2): 176-183. SAS Institute (2002) Statistical systems version 9. SAS Institute Inc. Cary, NC27513, USA. Shuaib M, Alam Z, Zahir A, Waqar A, Taufiq A and Ikhtiar K (2007) Characterization of wheat varieties by seed storage protein electrophoresis.African Journal of Biotechnology 6: 497- 500. Singh RK and Chaudhary BD (1985) Biometrical methods in quantitative analysis.Kaljuni Publishers, New Delhi, India. Singh AK and Raj N (2004) Variability studies in tomato under cold arid condition of Ladakh. HorticultureJournal 17:67-72. Snedecor GW and Cochran WG (1967) Statistical Methods, 6th ed., Iowa State University Press. USA. Songsri P, Joglloy S, Kesmala T, Vorasoot N, Akkasaeng CPA and Holbrook C (2008). Heritability of drought resistant traits and correlation of drought resistance and agronomic traits in peanut.Crop Science 48: 2245-2253. Tasisa J, Belew D, Bantte K and Gebreselassie W (2011).Variability, heritability and genetic advance in tomato (Lycopersiconesculentum Mill.) genotypes in West Shoa, Ethiopia.American-Eurasian Journal of Agriculture & Environmental Science 11(1): 87-94. Tazeen M, Nadia K and Farzana NN (2009.) Heritability, phenotypic correlation and path coefficient studies for some agronomic characters in synthetic elite lines of wheat. Journal of Food, Agriculture and Environment 7(3-4): 278-282. Ullah MZ, Hasan MJ, Chowdhury AZMKA, Saki AI and Rahman AHMA (2012).Genetic variability and correlation in exotic cucumber (CucumissativusL.) varieties.Bangladesh Journal of Plant Breeding and Genetics 25(1): 17-23 Weising K, Nybom H, Wolff K and Kahl G (2005).Application of DNA fingerprinting in plant sciences. In: DNA fingerprinting in plants: Principles, Methods and Applications, CRC Press, Boca Raton, pp. 235-276.