Abstract:
A field experiment was carried out in Randomized Complete Block Design
(RCBD) with three replications at the experimental field of Sher-e-Bangla Agricultural
University (SAU), Dhaka during the Kharif season of 2022 to examine the genetic
variability, correlation, and path analysis based on 12 characters of 43 sesame genotypes.
Analysis of variance exhibited significant differences among the genotypes for most of
the characters except the number of capsules per plant. The phenotypic variance and
phenotype coefficient of variation were relatively higher than the respective genotypic
variance and genotypic coefficient of variation for all the characters. High broad sense
heritability together with high genetic advance in percent of mean was observed for
number of secondary branches per plant (90.1%), 1000-seed weight (99.3%), and seed
yield per plant (97.9%) while moderate heritability for days to 50% flowering (59.8%).
The correlation coefficient analysis revealed that seed yield per plant had a significant
positive correlation with plant height, days to 50% flowering, days to 80% maturity,
number of primary branches per plant, number of capsules per plant, number of seeds per
capsule, height of the first capsule, and 1000-seed weight. It appears from path coefficient analysis that plant height (0.856), days to 80% maturity (0.227), number of
primary branches per plant (0.467), number of secondary branches per plant (0.441),
capsule length (0.258), and number of seeds per capsule (0.213) had a positive direct
effect on the yield per plant whereas, internode length (-0.799) followed by number of
capsules per plant (-0.370), and days to 50% flowering (-0.198) had a negative direct
effect. Based on mean performance, heritability, and interrelationship, the genotypes G6,
G12, and G36 for seed yield per plant, and the genotypes G26, G27, and G37 for early
maturity could be selected for further varietal improvement of sesame.
