Significant Role of Environment on Different Vegetative Characteristics of Some Maize Varieties Available in Bangladesh in Respect of Variance, Heritability and Genetic Advance

Md. Deluar Hossain, Md. Shahidur Rashid Bhuiyan, Firoz Mahmud, Naheed Zeba, Md. Rafiqul Islam

Abstract:

The experiment was conducted for screening superior variety in respect of vegetative characteristics. In this experiment 50 maize varieties were used. The experiment conducted was laid out in randomized complete block design with three replications. For screening superior maize varieties, the analysis of variance was done. Analysis of variance revealed significant differences among the genotypes for all the characters studied. In respect of cob height, the phenotypic variance (63.19) was higher than the genotypic variance (51.86) and the phenotypic coefficient of variation (10.70%) was higher than the genotypic coefficient of variation (9.69%). Phenotypic variance (553.46) was higher than the genotypic variance (271.15) in case of plant height and genotypic (7.83%) co-efficient of variation. The differences between phenotypic variances (1.11) and genotypic variances (0.60) were relatively low for leaves per plant. Leaves per plant showed moderate heritability (53.79%) along with low genetic advance in percentage of mean (9.12%) revealed the possibility of predominance of both additive and non additive gene action in the inheritance of this trait. In case of leaf length, the phenotypic variance and genotypic variance were 54.07 and 33.05, respectively and high heritability (61.12) coupled with moderate genetic advance in percent of mean (10.64) attributed to both additive and non-additive gene actions. Phenotypic and genotypic variance for leaf breadth was observed 0.79 and 0.51, respectively. High heritability (64.54) coupled with moderate genetic advance in percent of mean (13.45) attributed to both additive and non-additive gene actions. The phenotypic coefficient of variation (10.12%) was higher than the genotypic coefficient of variation (8.13%), which suggested that environment has a significant role on the expression of this trait.

Keywords:

Advance genetics, Heritability, Maize, Variance, Vegetative characteristics

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