Abstract:
A field experiment was conducted forty-three sesame (Sesamum indicum L.) genotypes at
Sher-e-Bangla Agricultural University, Dhaka, during the period of March 2022 to
August 2022 using Rrandomized Complete Block Design (RCBD) with three replications
to study the genetic variability and interrelationship for various traits among the
genotypes. The results revealed that there was a significant variation among the
genotypes for the studied traits. The phenotypic variances were higher than the genotypic
variances. High broad base heritability together with high genetic advance in percent of
mean was observed for number of secondary branches per plant (90.06%), 1000-seed
weight (99.31%) and seed yield per plant (97.89%) while moderate heritability for plant
height (59.81%). The significant positive correlation with seed yield per plant was found
for plant height (r
g
= 0.546, r
p
= 0.246), days to 50% flowering (r
g
= 0.587, r
= 0.448),
days to 80% maturity (r
g
= 0.615, r
p
= 0.321), number of primary branch (r
=
0.344), number of capsules per plant (r
g
= 0.775, r
= 0.275), number of seed per capsule
(r
g
= 0.320, r
p
= 0.240), height of first capsule (r
p
g
= 0.376, r
= 0.254) and 1000-seed
weight (r
g
= 0.377, r
p
p
= 0.373). Path co-efficient analysis revealed 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 the positive direct effect on yield per plant whereas,
internode length (-0.799) followed by and number of capsules per plant (-0.370) and days
to 50% flowering (-0.198) had the negative direct effect. Considering mean performance,
heritability and correlation analysis, the sesame genotypes G6, G12 and G36 for seed
yield per plant, and G26, G27 and G37 for early maturity could selected for further
improvement.
