Abstract:
A field experiment was conducted with 62 F₃ genotypes of Brassica napus L. at the
experimental field of Sher-e-Bangla Agricultural University, Dhaka to study the
correlation, path coefficient and genetic diversity analysis in f₃ generation
during November 2013 to February 2014. The genotypes were found significantly
different for all the characters studied. Comparatively phenotypic variances were
higher than the genotypic variances for all the characters studied. The high GCV
value was observed for number of secondary branches per plant (31.23) per plant.
Plant height, days to 50% flowering, number of siliqua per plant, siliqua length and
seed yield per plant showed high broad base heritability. The significant positive
correlation with seed yield per plant was found in plant height (0.368**), the number
primary branches per plant (0.332**), number of secondary branches per plant
(0.382**), number of siliqua per plant (0.549**) and siliqua length (0.037**). Path
coefficient analysis revealed that number primary branches per plant (0.678), number
of secondary branches per plant(0.182),plant height(0.582), days to 50% flowering
(0.390), days to 80% maturity (0.575) and thousand seed weight(0.289) had the
positive direct effect on yield per plant. The genotypes were grouped into five
clusters. The highest inter cluster distance was observed between cluster (17.392) I
and IV and the maximum intra cluster distance (0.83) was found in cluster IV.
Considering group distance and other agronomic performance genotypes G8, G14,
G19, G21, G47 and G55 might be suggested for future hybridization program.
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: JULY-DECEMBER, 2014
