ESTIMATION
OF GENETIC VARIABILITY, HERITABILITY AND GENETIC ADVANCE IN AGRO-MORPHOGENIC AND
NUTRITIONAL TRAITS OF TOMATO (Solanum lycopersicum
L.) GENOTYPES
T.T.A. Bhuiyan, M.M. Rahman, M.R. Islam, M.M.A. Laylin,
and N. Zeba
*Corresponding author: naheed0359@hotmail.com
Abstract
An experiment was conducted at Sher-e-Bangla
Agricultural University, Dhaka, Bangladesh during the Rabi season of 2012
to study the genetic variability and inheritance in different agro-morphogenic and
nutritional traits of tomato. The genotype BARI
tomato-2 showed the best performance for number of cluster per plant, number of
fruits per cluster, number of fruits per plant, single fruit weight, fruit
length, fruit diameter and fruit yield per plant. In terms of % of Brix
content, lycopene content and vitamin C content, genotype BD-7760, BARI tomato
8 and BD 7762 showed the best performance respectively. The number of fruit
yield per plant showed highest range of variation (2275.91-408.38) g with the
highest mean value (1157.83) g. Narrow gap between PCV and GCV for days to
maturity, plant height, number of branches per plant, number of cluster per
plant, number of fruits per cluster, number of fruits per plant, fruit length
and fruit yield per plant suggested that environmental influence was minor on
the expression of the genes controlling these traits and selection based upon the
phenotypic expression of these characters would be effective for the
improvement of this crop. High heritability coupled with high genetic advance
in percent of mean were observed in plant height,
number of cluster per plant, number of fruits per plant, single fruit weight,
fruit length, fruit diameter and percent of Brix. Hence, these characters are
highly heritable and there is a wide scope for improvement through
selection of these traits. Most likely the heritability of these traits is due
to additive gene effects and selection may be effective in early generations
for these traits.
Key words: Genetic variability, Tomato,
Heritability and Genetic advance.
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