GENETIC
DIVERSITY OF FRUIT DEVELOPMENT RELATED TRAITS OF TOMATO
M. F. Islam, J. Rahman*, M.S. Islam and A. Akbar
*Correspondence
author: jamilsau@gmail.com
Abstract
Twenty-nine
genotypes of tomato (Lycopersicon esculentum
Mill.) were evaluated at Sher-e-Bangla Agricultural University,
Dhaka, during October 2011 to February 2012 following randomized complete block
design to assess the magnitude of genetic divergence in genotypes using
Mahalanobis’s D2 and Rao’s canonical variate analysis for thirteen fruit
related parameters. The twenty-nine inbreds formed five distinct clusters. The
intra-cluster distance was low indicating that the genotypes within the same
clusters were closely related. The highest inter-cluster distance was observed
between clusters I and III and the lowest between clusters I and II. The
clusters I and V each contained the highest number of genotypes. Cluster V
showed the highest mean values for fruit yield per plant, fruit weight, fruit
diameter and locule number, while cluster II showed the highest mean values for
fruits per plant and branches per plant. Cluster I had the lowest mean values
for first flowering and fruit setting traits. Days to first flowering, fruit
diameter, locule number and fruits per plants showed maximum contribution
towards total divergence among different characters studied. Based on the
medium to high inter-cluster distance, per se performances and desirable
traits, we selected fourteen tomato genotypes viz. BARI Tomato-4, BARI
Tomato-11, BD-7260, BARI Tomato-3, BD-7301 and BD-7761 for future hybridization
program. Crossing between these genotypes would have higher chance to obtain heterosis
with high performing crosses of desirable characters.
Keywords: Genetic diversity, germplasm,
fruits, and tomato.
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Return Volume: Journal of Experimental Biosciences 5(1): January 2014
