Abstract:
The experiment was conducted with the aim of assessment of the genetic
variability,heritability,character association, path analysis of F
7
population of
Brassica napus L. from November 2019 to February 2020.In this experiment, fortythree
genotypes
of
Brassica
napus
L.
were
evaluated based on randomized complete
block design with three replications at the experimental field of Sher-e-Bangla
Agricultural University, Dhaka.The genotypes were found significantly variable for
all the eleven characters and From the values of mean. range and CV (%) of seed
yield and yield contributing characters it was confirmed that there were considerable
variation present among all the genotypes used in the experiment.The values of GCV
and PCV indicated that there was least variation present among most of the
characters.Comparatively, phenotypic variances were higher than the genotypic
variances for all the characters studied. The high GCV and PCV value were observed
for number of seed yield per plant (38.06 and 4.57 respectively). Seed yield per plant
(99.47) exhibited the highest value of heritability followed by number of siliquae per
plant (97.08). The significant positive correlation for seed yield per plant was found
with days to maturity (0.186) and thousand seed weight (0.659). Path co-efficient
analysis revealed that days to 50% flowering, number of primary branch, siliquae
length, number of siliqua per plant, number of seed per siliquae and thousand seed
weight had the positive direct effect on yield per plant.. Considering genetic analysis
and other agronomic performance genotypes G6 (P1), G14 (P2), G18 (P2) and G9
(P3) might be suggested as promising high yielding lines with early maturity as
fulfillment of farmer’s demand.
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
