Abstract:
An experiment was conducted to study on genetic divergence for yield and its
contributing characters among 32 genotypes of mungbean. The study was
carried out at the experimental field of the Department of Genetics and Plant
Breeding, Sher-e-Bangla Agricultural University, Dhaka- 1207 during period
of March to July, 2015. The results indicated that the genotypes differed
regarding all the characters studied. The phenotypic variance was higher than
genotypic variance in all the characters studied. The phenotypic coefficients of
variation were also higher than genotypic coefficients of variation in all the
characters studied. Moderate to high heritability was observed for all
characters. High heritability coupled with high genetic advance in percent
mean were observed for peduncles per plant, pods per plant, 100 seed weight
and seed yield per plant. The characters peduncle per plant and pods per plant
showed highly significant positive correlation with seed yield per plant. Days
to 50% flowering, branches per plant, branch length, peduncles per plant, pods
per plant, seeds per pod and 100 seed weight showed positive direct effect on
yield. All the genotypes were grouped into five clusters having 10, 10, 5, 5 and
2 genotypes, respectively. Cluster I and II comprised the maximum number
(10) of genotypes followed by cluster III and IV (5). The cluster V comprised 2
genotypes. The highest inter-cluster distance (42.06) was observed between the
clusters III and cluster IV and highest distant genotypes were G11 and G22
followed by G32 and G27. The lowest inter-cluster distance was observed
(18.05) between the clusters between clusters I and II, The lowest distance was
observed between genotype G8 and G9. Among the characters studied
peduncles per plant, pods per plant, 100 seed weight, seed yield per plant were
major characters that contributed most towards genetic divergence.
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