| dc.description.abstract | Thirty inbred lines of maize were evaluated for ten parameters at the experimental field
of Hajee Mohammad Danesh Science and Technology University, Dinajpur, Bangladesh
during November 2016-April 2017 to study the genetic variability and diversity in maize
inbred lines. The experiment was laid out in randomized complete block design (RCBD)
with three replications. Mean performance, variability, heritability, coefficient of
variation and diversity analysis of yield and yield contributing characters namely Cob
height, plant height, cob length, cob diameter, number of kernel rows per cob, number of
kernels per row, number of kernels per cob, 1000 kernels weight, yield per plant and
pith weight were performed. The highest weight of 1000 kernels (494.3g) was obtained
from ML28, the lowest weight of 1000 kernels (213.96g) was recorded from ML21,
1000 kernels weight of phenotypic variation (82.24) was higher than the genotypic
variation (18.65) which indicates high environmental effect was supported by narrow
difference between phenotypic (23.64) and genotypic (5.36) co-efficient of difference.
Weight of 1000 kernels had inherent potential among the genotype high heritability
(68.83) for this trait along with high genetic advance in percentage of mean (33.51). All
the genotypes were grouped into four clusters. Cluster II was the largest cluster
comprising of sixteen maize genotypes followed by cluster I (9) and III (4). Cluster
distance denotes by the average inter and intra cluster distance are the approximate
measure of the cluster divergence. The maximum (8.34) inter-cluster divergence was
observed between the clusters II and IV and it was minimum (3.94) between clusters I
and III. The maximum value of inter –cluster distances indicated that the genotypes
belonging to the cluster II is far diverged from those cluster IV. Genotypes of cluster II
show high intra cluster distance indicating high degree of divergence among the
genotypes and also mean performance of genotypes of cluster II show higher result in
case of plant height and yield per plant. High degree of performances like plant height,
thousand kernel weight and yield per plant with diversified genotypes of cluster II are
suitable for selection as parents for future hybridization program. | en_US |
