Abstract:
A field experiment was conducted with 41 populations of Brassica napus at the
experimental field of Sher-e-Bangla Agricultural University, Dhaka to study the
variability and interrelationship among the advanced populations during November
2018 to March 2019. The experiment was laid out in Randomized Complete Block
Design (RCBD) with three replications. Analysis of variance for each trait showed
significance differences among the populations. The first two components with Eigen
value were greater than others. The utmost inter cluster distance was observed
between cluster I and V and the maximum intra-cluster distance was found in cluster
I. Phenotypic variances were higher than the genotypic variances for all the characters
studied. Days to 50% flowering (90.45) exhibited the highest value of heritability and
number of seeds per siliqua (47.71) exhibited the lowest value of heritability. The
significant positive correlation with seed yield per plant was found in days to 1
flowering, days to 50% flowering, number of primary branches per plant, number of
secondary branches per plant and number of siliqua per plant. Path co-efficient
analysis revealed that days to 1
st
flowering, days to 50% flowering, plant height,
number of secondary branches per plant, number of siliqua per plant and thousandseed
weight had the positive direct effect on yield per plant. Considering group
distance and other performance populations G
1
(Nap-2037), G
2
(Nap-10020), G
(Nap-10015), G
4
(Nap-10019), G
9
(Nap-084), G
13
(Nap-10009), G
(Nap-179), G
32
(Nap-0885), G
34
(BARI-8) and G
37
30
(Nap-205) might be suggested for
future hybridization program.
Description:
A Thesis
submitted to the Department of Genetics and Plant Breeding
Sher-e-Bangla Agricultural University, Dhaka
In partial fulfillment of the requirements
for the degree of
MASTER OF SCIENCE
IN
GENETICS AND PLANT BREEDING
