Abstract:
This research was carried out at experimental field of Sher-e-Bangla Agricultural
University, Dhaka, to study the variability, correlation, path analysis and genetic
diversity during November 2018 to February 2019 growing seasons with 38
populations. The genotypes were found significantly variable for most of the characters.
The maximum plant height was observed by the population G11. Maximum primary
branches per plant G9. Comparatively phenotypic variances were higher than the
genotypic variances for most of the characters studied. The high GCV value was
observed for number of secondary branches per plant (27.20). Days to maturity (70.73)
exhibited the highest value of heritability followed by seed yield per plant (67.69) while
1000 seed weight (12.49) exhibited the lowest value of heritability. High heritability
with high genetic advance as percent of mean was noticed for secondary branch per
plant (43.83), total siliqua per plant (33.52), seed yield per plant (30.96). The significant
positive correlation with seed yield per plant was found in number of primary branches,
total number of siliqua, days to maturity. Path co-efficient analysis revealed that days
to 50% flowering (0.286), days to maturity (0.212), plant height (0.069), root length
(0.164), primary branches (0.375), total siliqua per plant (0.383), siliqua length (0.067)
and 1000 seed weight (0.082) had the positive direct effect on yield per plant. On the
basis of cluster analysis, all the genotypes were classified in six clusters. The highest
inter cluster distance was observed between cluster I and IV (34.61). The lowest intercluster
distance was observed between clusters IV and V (3.20). Considering group
distance and other agronomic performance populations G9 (Nap205 x Nap2013), G16
(Nap248 x Nap9901), G23 (Nap9908 x Nap0130), G29 (Nap9905 x Nap2037), G30
(Nap248 x Nap2012) and G31 (Nap9906 x Nap2001) might be suggested for future
breeding programme.
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
