Abstract:
A field experiment was conducted with twenty five 14 genotypes of Brassica
napus L. and a check variety at the experimental field of Sher-e-Bangla
Agricultural University. Dhaka to study the variability, correlation and direct
and indirect effect of different characters on seed yield per plant during
November 2012 to March 2013. The phenotypic variances were higher than the
genotypic variances. Genotypie and phenotypie variances were observed
among all the 174 progenies for all the characters studied. The high GCV value
was observed for yield per plant. Days to 50% flowering showed high
heritability with moderate genetic advance in percent of mean. Yield per plant
had significant and positive association with number of primary branches per
plant, number of siliqua per plant. The path co-efficient analysis revealed that
plant height, primary branches, days to 50% tlowering, days to 50% maturity,
siliqua length, number of seeds per siliqua, 1000 seed weight had the negative
direct effect on yield per plant. Number of siliqua per plant had the positive
direct effect on yield per plant.Ten most promising crosses with short duration
and higher yield per plant were selected from the F4 materials.
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
SEMESTER: JANUARY-JUNE, 2014