Abstract:
A field experiment was conducted at the experimental farm of Sher-e-Bangla
Agricultural University with yard long bean genotypes during „Kharif’ season (June
2016 to September 2016). Ten characters were studied to find out the genetic
variability, heritability and genetic advance, correlation coefficient analysis, path
coefficient analysis and genetic divergence. The genotypes were significantly variable
for all of the characters studied. High genotypic and phenotypic coefficient of
variation was observed for number of pods per plant (28.00% and 28.46%) and pod
yield per plant (27.87% and 29.37%). Accordingly high heritability accompanied with
high genetic advance in percent of mean in number of pod per plant (96.78% and
56.74%), pod yield per plant (90.01% and 54.46%), pod diameter (64.39% and
26.2%) and hundred seed weight (91.21% and 23.37%) suggested that these
characters would be considered for varietal selection. The correlation studies revealed
that pod yield per plant showed significant positive correlation with no. of seed per
pod (0.932 and 0.767), no. of pods per plant (0.974 and 0.970) and significantly
negative correlation with dates to marketable harvest (-0.537 and -0.503) at genotypic
and phenotypic level. These characters would be considered for the selection a good
variety. Path analysis revealed days to first flowering (0.502), days to maturity
(1.269), number of pods per plant (0.600), pod weight (0.185) and number of seeds
per pod (0.143) had direct positive effect on pod yield per plant, indicating these traits
are the main contributors to pod yield per plant. The studied genotypes were clustered
into 3 groups with highest of inter-cluster distance between clusters I and III (79.856).
This indicates diverse genotypes from these two clusters, if involved in hybridization
may produce a wide spectrum of segregating population while the lowest inter-cluster
distance was observed between cluster II and III (34.640).
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
