Abstract:
An experiment was conducted to study genetic divergence and morphological
characterization and yield potentiality of ten difThrcnt onion genotypes. The
study was carried out at the experimental farm, Dept. of Genetics and Plant
Breeding, SAU. during November. 2007 to April. 2008. The results indicated
that different genotypes showed significant variation regarding all the
characters studied. Maximum differences of genotypic and phenotypic
variances and coefficient of variation as well as high heritability coupled with
high genetic advance were observed for most of the traits. The maximum bulb
yield (524.64 g) per plant was noticed in the genotype SAU-B-G-7. The same
genotype also showed highest performance in respect of no. of bulb per plant.
The genotype SAU-B-G- I matured within minimum days (108.00) which
showed the lowest (32.39 g) bulb yield among the materials under study.
Cluster II comprised maximum number of genotypes (6) followed by cluster
III. I, and IV. fl,e highest inter genotypic distance was observed between
genotypes SAU-B-G- I and SAU-B-G-7 (3.483). The inter cluster distance
was maximum between the cluster I and IV (9.083). Among the characters
diameter of floral stock (1.1473) and days requircd for visible appearance of
shoot (0.1220) were major characters that contributed mostly toward genetic
divergence.
Description:
A Thesis
Submitted to the Faculty of Agriculture,
Sher-e-Bangla Agricultural University. Dhaka,
in partial flulfiliment of the requirements
for the degree of
MASTER OF SCIENCE
IN
GENETICS AND PLANT BREEDING
SEMESTER: JANUARY-JUNE, 2009
