Abstract:
An experiment on oleiferous Hra.s'sica napus L. was conducted at the experimental field
to evaluate diallel analysis for ten different characters. Out of fifteen crosses, the parent
Nap-9908 was the best general combiner for number of siliquae per plant, seed per
siliqua and seed yield per plant. The parent Nap-205 was the best general combiner for
plant height parent Nap-9901 was the best general combiner for days to maturity and
Nap-lOS for number of primary branches per plant. The parent Nap-9905 was the best
combiner for siliqua length and parent Nap-I 30 for thousand seed weightlhe higher
magnitude of (JC'A variance was observed than that of SCA variance for plant height
days to maturity, no. of primary branches per plant, number of siliquae per plant, siliqua
length, seeds per siliqua, seed yield per plant and thousand seed weight. The SCA
estimates of various characters revealed that Nap-9908 x Nap- 130 was the best
combination for plant height Nap-9905 x Nap-205 for no. of primary branches per plant.
Nap-9901 x Nap-205 for secondary branches, Nap-9908 x Nap-9901 for number of
siliqua per plant. Nap-9901 x Nap-205 for siliqua length. Nap-9901 x Nap-205 for seeds
per siliqua, Nap-9905 x Nap-205 for seed yield per plant and Nap-lOS x Nap-9908 for
thousand seed weight were the best cross combinations. The Vr-Wr graph indicate over
dominance for plant height, days to flowering, primary branches per plant siliquae per
plant, seeds per siliqua, siliqua length and thousand seed weight. Partial dominance was
observed for secondary branches per plant and seed yield per plant. The graphical
analysis also indicates wide genetic diversity among the parents.
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
