| dc.description.abstract | Twenty nine 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 2014-April 2015 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, coefficient of variation and diversity analysis of yield and
yield contributing characters namely plant height, cob height, cob length, cob
diameter, number of cobs per plant, tassel length, number of kernel rows per cob,
number of kernels per row, total number of kernels per cob, 1000 grains weight were
performed. The highest weight of 1000 grains (376.333g) was obtained from ML8,
the lowest weight of 1000 grains (307.8g) was recorded from ML19, 1000 grains
weight of phenotypic variation (335.029) was higher than the genotypic variation
(59.52) which indicates high environmental effect was supported by narrow
difference between phenotypic (99.58) and genotypic (41.97) co-efficient of
difference. Weight of 1000 grains had inherent potential among the genotype high
heritability (17.766) for this trait along with high genetic advance in percentage of
mean (36.29). All the genotypes were grouped into five clusters. Cluster I was the
largest cluster comprising of nine maize genotypes followed by cluster II(6) and III
(6). Cluster distance denotes by the average inter and intra cluster distance are the
approximate measure of the cluster divergence. The maximum inter-cluster
divergence was observed between the clusters I (32.84) and II (15.68) and it was
minimum between clusters III (11.75) and IV (4.66). The maximum value of inter –
cluster distances indicated that the genotypes belonging to the cluster II is far
diverged from those cluster V. Both vectors (vector I and Vector II) were positive for
plant height, cob height, cob length, cob diameter. So these four characters had the
highest contribution towards the divergence among 29 maize inbred lines. Intra
cluster distance was much lower than the inter cluster one, suggesting, heterogeneous
and homogeneous nature between and within groups. | en_US |
