Studies on Genetic Variability, Heritability and Genetic Advance Estimates in Newly Developed Maize Genotypes (Zea Mays L.).

ABSTRACT

The present study was carried out at Research farm, College of Agriculture, ANGRAU, Rajendranagar, Hyderabad during kharif, 2011 to determine the various parameters of genetic variability, broad sense heritability and genetic advance estimates in newly developed 65 maize genotypes. Analysis of variance revealed that the mean sum of squares due to genotypes showed significant differences for all the 11 characters studied. High to moderate estimates of GCV and PCV were recorded for Grain yield, number of kernels per row, 100-kernel weight, ear length and plant height which represents considerable variability and offers scope for genetic improvement through selection. Grain yield, number of kernels per row, 100-kernel weight, ear length and ear height had high GCV estimates with high heritability. Moderate estimates of genetic advance with high heritability was recorded for Grain yield, number of kernels per row, 100-kernel weight, ear length, ear height and plant height which further leads to improvement of traits under selection. Thus provides better opportunities for selecting plant material for these traits in maize breeding program.