Abstract:
A field experiment was conducted with 29 genotypes of tomato (Lycopersicon
esculepuum) considering 13 fruit related characters at the experimental farm of Sher-eBangla
Agricultural University, Dhaka. during October 2011 to February 2012. The
objectives of the study were to assess the genetic diversity among the genotypes, to know
the association of traits, direct and indirect relation between yield contributing characters
and to screen out the suitable parents group for hybridization. The phenotypic variances
were higher than the genotypic variances. The significant positive correlation with fruit
yield per plant was found in fruit diameter, number of locules per fruit, number of
clusters per plant, number of fruits per plant and fruit weight. Path coefficient analysis
showed that fruit weight had maximum positive direct effect on fruit yield followed days
to first fruit setting, fruit diameter, number of clusters per plant and number of fruits per
plant. Multivariate analysis techniques were used to classify 29 tomato genotypes. The
genotypes were grouped into five clusters. Both cluster I and cluster V contained the
highest number of genotypes and cluster H contained the lowest number of genotypes.
The highest inter-cluster distance was found between cluster I and 111 and the lowest
inter-cluster distance was observed between cluster I and If. On the other hand, the
highest intra cluster distance was found in cluster II and the lowest intra cluster distance
was observed in cluster I. Cluster I consists of nearest cluster with D2 values cluster II &
farthest cluster with D2 values cluster III. The value of Vector I and Vector II revealed
that both Vectors had positive values for days to first flowering, fruit diameter, number
of locules per plant and number of fruits per plant indicating the highest contribution of
these traits towards the divergence among the genotypes. Considering all the characters
06 (SARI Tomato4) and Gio (BD-7260); G& (SARI Tomato4) and G73 (BAR!TomatoII);
G6 (BAR!Tomato4) and G (BARI Tomato-3); 65 (BAR!Tomato-3) and G (BD7301)
may be suggested for future hybridization program.
Description:
A Thesis
Submitted to the Faculty of Agriculture,
Sher-e-Baxigla Agricultural University, Dhaka,
in partial fulfillment of the requirements
for the degree of
MASTER OF SCIENCE
IN
GENETICS AND PLANT BREEDING
