Abstract:
A research was conducted by using live parental genotypes of l3ra.tcica rupa and their
ten F3 progenies including reciprocals in the experimental thmi of Sher-e-Bangla
Agricultural University. Dhaka. during November 2006-March 2007 to study the
variation in different characters. correlation between pairs of characters and the direct
and indirect effect of different characters on seed yield per plant of the F3 matenals.
From the values of mean. range and cv (%) of seed yield and yield contributing
characters it was conlirmed that there were large variation present among the all
genotypes used in the experiment. The values of phenotvpic variances was higher than
the corresponding genotypic variances. Number of primary branches per plant, number
of secondary branches per plant. days to 50% Ilowcnng. length of siliqua. number of
seeds per siliqua. thousand seed weight and yield per plant showed least dit'Ibrence
between phcnotvpic and genotypic variances. The values of GC'V and PCV indicated
that there were considerable variation among the all characters except days to maturity.
ftc plant height, days to 50% flowering and number of siliquae per plant showed high
heritability with high genetic advance and genetic advance in percentage of mean.
Fifteen most promising plants with yellow seed and short a duration from six crosses
and lilly plants with brown seed and a short duration from eight crosses were selected
out of the ten crosses of- the F materials of Ilrwsica rapa. Yield per plant had
signilicant and highest positive correlation with thousand seed weight and yield per
plant showed also positive correlation with days to maturity lollowed by number of
seeds per siliquac, number of secondary branches per plant. length of siliqua and
number of siliquae per plant. The path co-efficient analysis exhibited that thousand seed
weight had the highest positive direct effect followed by days to 50% flowering, length
of siliqua. number of primary branches per plant. number of secondary branches per
plant. days to maturity and number of seeds per siliqua.
Description:
A Thesis
Submitted to the faculty of Agriculture,
Sher-e-Bangla Agricultural University, Dhaka
in partial fblfillment of the requirements
for the degree of
MASTER OF SCIENCE
IN
GENETICS AND PLANT BREEDING
SEMESTER: JANUARY- JUNE, 2008
