Abstract:
The experiment was conducted using thirty crossing genotypes and six parents in F
2
generation of tomato (Solanum lycopersicum L.) under field condition for identifying their
inter genotypic variability, correlation, path co-efficient and genetic diversity by
considering their nineteen yield contributing characters at the experimental field of Shere-Bangla
Agriculture
University,
Dhaka,
Bangladesh.
For
all
the
characters
the
genotypes
significantly
different
from
each
other.
PCV
was
always
higher
than
GCV
for
all
the
traits.
High
heritability
was
observed
for
the
number
of
flower
per
cluster
(84.93%),
number
of
fruit
per cluster (90.30%), number of fruit per plant (99.77%), individual fruit weight
(99.61%), fruit length (91.84%), and yield per plant (93.16%). Positive correlation coefficient
for
both
genotypic
and
phenotypic
with
yield
was
found
for
leaf
width,
individual
fruit
weight, fruit length, fruit width, skin diameter and locule number. A positive direct
effect on yield per plant for the characters, leaf length, leaf width, number of cluster per
plant, number of flower per plant, individual fruit weight, fruit length, fruit width, relative
water content and P
H
was identified through path co-efficient analysis. The highest intercluster
distance was observed between II and IV (14.738) and the lowest inter-cluster
distance was observed between I and V (3.681). The highest intra-cluster distances were
observed in cluster III and the lowest intra-cluster distances were observed in cluster IV.
Based on cluster mean and agronomic performance the genotypes G6×G1 showed the
minimum days to first flowering and days to 50% flowering from cluster V. G6 showed
the maximum number of cluster per plant from cluster II. G7×G1 showed maximum
individual fruit weight from cluster IV. G6×G7 showed maximum fruit width and total
soluble solids from cluster V and G9×G7 showed maximum yield per plant from cluster
IV. Therefore, considering group distance and other agronomic performance these inter
genotypic crosses might be suggested for future breeding program.
Description:
A thesis
Submitted to the Faculty of Agriculture
Sher-e-Bangla Agricultural University, Dhaka,
in partial fulfillment of the requirements
for the degree of
MASTER OF SCIENCE
IN
GENETICS AND PLANT BREEDING
