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The present study was conducted at Maize Research Centre, Agricultural Research Institute,
Rajendranagar, Hyderabad during Rabi, 2012-13 to determine the various parameters of genetic
variability, broad sense heritability and genetic advance estimates in newly developed 86 maize
genotypes. Analysis of variance revealed that the mean sum of squares due to genotypes showed
significant differences for all the 12 characters studied. Traits yield per plant, plant height, ear height,
number of kernels per row, 100-kernel weight were showed high heritability accompanied with high to
moderate genotypic and phenotypic coefficient of variation and genetic advance which indicates that
most likely the heritability is due to additive gene effects and selection may be effective in early
generations for these traits. Whereas high to moderate heritability along with low estimates of genetic
advance were observed for days to 50 per cent tasseling, days to 50 per cent silking, shelling percentage,
ear length and days to maturity ear girth and number of kernel rows per ear.
Key Words: Maize, Heritability, Genetic Advance, Genotypic and Phenotypic coefficient of variation
(PCV and GCV).