Abstract:
The experiment was conducted with thirty four BC1F, progenies of Brassica napus and one
check variety at the experimental farm of Sher-e-Bangla Agricultural university. Dhaka-
1207, during november, 2010 to March, 2011 to study the variability, correlation and path
analaysis in BC, F, generation of Brassica napus. Comparatively phenotvpic variances were
higher than the genotypie variances for all the characters studied. The high OCY value was
observed for number of secondary branches per plant. High heritability with low genetic
advance in percent of mean was observed for number of seeds per siliqua, siliqua length and
thousand seed weight indicating that non-additive gene effects were involved for the
expression of these characters and selection for such traits might not be rewarding. Iligh
heritability with high genetic advance in percent of mean was observed for number of siliqua
per plant and seed yield per plant indicating that these traits were under additive gene control
and selection for genetic improvement for these traits would be effective. The results of
correlation revealed that yield per plant had positive association with plant height, days to
50% (lowering and days to maturity. Path co-efficient analysis revealed that plant height,
days to 50% flowering, days to maturity and thousand seed weight had the positive direct
effect on yield per plant. Whereas, number of primary branches per plant, number of
secondary branches per plant, number of siliquae per plant, number of seeds per siliqua and
siliqua length had the negative direct effect on yield per plant.
Description:
A Thesis
Sufimited to the Faculty of Agricufture,
Sher-e-Bangla Agricultura University, Dhaka,
in partial filfillment of the requirements
for the Degree of
MASTER OF SCIENCE
IN
GENETICS AND PLANT BREEDING
SEMESTER: JULY-DECEMBER, 2012
