Abstract:
The present research was undertaken to determine the genetic variability,
correlation among different yield contributing characters of mungbean (Vigna
radiata L.). The experiment was laid out in Randomized Complete Block
Design (RCBD) with three replications. The research was done based on 33
genotypes collected from Bangladesh Agricultural Research Institute,
considering eight quantitative characters during Kharif season from March to
June, 2017 in research farm of Sher-e-Bangla Agricultural University. The
analysis of variance showed significant variation in all the traits studied. The
phenotypic variances were greater than the genotypic variances with little
differences in all traits except plant height, number of branches per plant and
pods per plant. High heritability coupled with high genetic gain was observed
in days to 50% flowering, plant height, pod length, 100 seed weight and seed
yield per plant which indicated the effect of additive genes. In the correlation
study seed yield per plant had highly significant positive relation with number
of pods per plant, number of branches per plant and number of seeds per pod.
Pods per plant followed by pod length showed the highest positive direct effect
on the seed yield per plant. Selection of these traits might cause the probability
of simultaneous improvement of mungbean. The genotypes were grouped into
four clusters by diversity (D
2
) analysis where cluster I comprised 13 genotypes
and cluster III and IV had 6 genotypes in each. The highest inter cluster
distance was found between cluster II and cluster IV (10.425) and intra cluster
distance in cluster II (2.45). Principal component analysis revealed first two
components contributed 68.11% towards genetic diversity in mungbean.
Therefore, it might be concluded that considering group distance and other
agronomic performance G
1
(BD-6874), G
2
(BD-6875), G
14
(BD-6904), G
(BD-6929), G
(BD-6932) had potential for improvement for further
hybridization in breeding 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
