| dc.description.abstract | The experiment was conducted at the experimental field of the Department of Genetics and Plant
Breeding of Hajee Mohammad Danesh Science and Technology University, Dinajpur-5200, during,
the period from November, 2018 to April, 2019 with 3 white maize and 12 yellow maize genotypes.
The experiment was laid out in Randomized Complete Block Design (RCBD) with three replication
and Least Significant Difference (LSD) test was done at 5% level of probability. In this study
genotypic and phenotypic variances, genetic advance, genotypic and phenotypic co-efficient of
variation, simple correlations and linear regression were investigated for grain yield and other ten
morphological characters among the genotypes of maize. The genotypes differed significantly for all
traits studied. Genetic coefficient of variation was high for leave length at 30 days after sowing
(36.52cm), cob length (22.97cm), pith weight (23.95g), kernel per cob (25.34) and yield per plant
(37.74g). Root length at 105 DAS (68.74cm), root length at 120 DAS (68.74cm), leaves per plant at
30 DAS (70.27), leave length at 90 DAS (67cm), leave length at 105DAS (73.50cm), leave length at
120 DAS (73.50cm), cob diameter (69.18cm) showed moderately high yield potential and very high
for rest of the characters. Genotypic advance in percentage of mean was low for root length at 105
DAS i.e. RL105 (7.50cm), RL120 (6.95 cm), LL90 (7.34 cm), LL105 (8.77 cm), LL120 (8.77 cm),
cob diameter (4.77 cm), 100-kernel weight (5.21g) and high for PH105 (21.09 cm), PH120 (21.09
cm), RL30 (25.18 cm), RL75 (26.93 cm), LPP60 (25.28), LPP75 (30.61), LPP90 (28.28), LPP105
(34.86), LPP120 (34.86), LL30 (74.83), LL45 (26.62), LL60 (22.42), cob length (45.95 cm), cob
weight (49.02g), kernel per cob (51.68g), yield per plant (77.34g) and the rest characters were
moderate. Final plant height at 120DAS (PH120) exhibited significant negative association with RL45
(-0.39*), RL60 (r=-0.66**), RL75 (r=-0.81**), RL90 (r=-0.57**) and for others were positive. Leaves
per plant at 120DAS (LPP120) exhibited positive association with LL30(r=0.04), LL60 (r=0.22), cob
diameter (r=0.26) and negative association with LL45 (r=-0.13) and other traits showed significant
positive relation to each other. The regression coefficient for independent variable like root length at
45 days after planting i.e. RL45 (R2
= 0.008, p>0.05), is not significant linear regression and the
corresponding scatter plot with the dependent variable yield per plant exhibited positive linear
regression for rest of the independent variables. In considering morphological traits and yield
potential, BARI Bhutta-14 performed outstanding superiority. | en_US |
