Abstract:
An experiment was conducted to study the morphological characterization and
genetic diversity in okra genotypes at the experimental field of Genetics and
Plant Breeding Department, Sher-e-Bangla Agricultural University from
November 2007 to April 2008. The experiment was laid out in Randomized
Complete Block Design (RCBD) with three replications. The present study was
undertaken with it view to asses the performance of twenty okra genotypes in
order to know the genetic parameter and variability of eleven quantitative
characters and finally assessing the genetic diversity among these genotypes.
Significant differences among the different genotypes for all characters were
observed. The mean performance of the genotypes as the days to 50%
flowering (67.18 days), days to edible maturity (81.70 days). plant height
(69.16 cm), height to 1 node from the ground (14.02 cm). number of branches
per plant (3.15), number of pods/plant (10.00), length of pod (10.10), diameter
of pod (1.59 cm), individual pod weight (12.75 g), number of seeds/pod (54.80)
and yield/plant (144.13 g) respectively were recorded. Iligh heritability (>60%)
was observed for days to flowering, days to edible maturity, plant height
height to l node from the ground, number of branches per plant, number of
pods/plant, diameter of pod, individual pod weight, number of seeds/pod and
yield/plant. For knowing the genetic diversity of okra genotypes, multivariate
analysis was done by using Genstat. As per ICA, 1)2 and cluster analysis, the
genotypes were grouped into 5 clusters. Cluster 1, 11, III. IV and V composed of
4. 2, 5, 5 and 4 genotypes, respectively. PCA showed 97.55 % variation against
first three eigen values. The highest intra-cluster distance (1.126) was found in
cluster II and lowest (0.2628) in cluster I among the five clusters. Considering
that the G7 , G9 and 0 from cluster 111. 01 from cluster 1. GI() from cluster 11
and Gs and 01 3 from cluster 1V were considered to be better parent for efficient
hybridization. Therefore, considering group distance and the agronom i c
performance, the inter genotypic crosses between 67 and G, 07 and 05, G7 and
Glo. G7 and G G9 and GI, G9 and 05, 69 and Glo, G9 and G13, Gil and l, Gll
and G. G and 010, 0i and 013 C1 and G. 0 and 010. 01 and °13, Cc and
010 G10 and might he considered for efficient hybridization programme.
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
SEMESTER: JULY—DECEMBER 2008
