Abstract:
The present experiment was conducted by using eighteen advanced genotypes of
Soybean (Glycine max L. Merrill) for selecting most promising genotypes at the
experimental field of Sher-e-Bangla Agricultural University (SAU), Sher-e-
Bangla Nagar, Dhaka-1207 during the period from mid-December, 2018 to mid-
April, 2019 based on some morphological traits. The experiment consisted of one
factor with three replications. The results indicated that the genotypes differed
regarding all the characters studied. The phenotypic variance and coefficient of
variation were higher than the genotypic variance and coefficient of variation in
all the characters studied. Moderate to high heritability was observed for all
characters except leaf length and number of primary branches per plant. High
heritability coupled with high genetic advance in percent mean were observed for
germination percentage, days to 50% flowering, plant height, number of pod per
plant, number of seeds per plant and thousand seed weight. The characters
germination percentage, days to 50% flowering, plant height, leaf length, number
of pod per plant, number of seeds per pod and number of seeds per plant showed
positive direct effect on yield. Therefore, importance had to be given for these
characters in further breeding program to improve soybean yield. All the
genotypes were grouped into four clusters having 5, 2, 6 and 5 genotypes,
respectively. Cluster III comprised the maximum number (6) of genotypes
followed by cluster I(5) and IV(5). The highest inter cluster distance (26.186) was
observed between the cluster I and II. Likewise highest distant genotypes were
G11(AGS-205) and G18 (BINA SOYBEAN 3) (1.362). Among the characters
studied days to 50% flowering, number of primary branches per plant, number of
seeds per pod, thousands seed weight were the important component characters
having higher contribution to the genetic divergence of soybean. As a result, these
traits could be emphasized during selection of parents for hybridization.
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
