Nwosu Et Al

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.1
and
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:
olaraich75@yahoo.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.

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