Genetic Variability and Inter-relationship among Grain Yield and It’s Components in Maize (Zea mays L.)

Abstract

The present investigation was carried out to estimate genetic variability, correlation and path coefficient analysis for fifteen yield attributing traits of twenty maize genotypes in the kharif -2021 season at Field Experimentation Center, Department of Genetics and Plant Breeding, Naini Agricultural Institute, Sam Higginbottom University of Agriculture Technology and Sciences, Uttar Pradesh in Randomized block design replicated thrice. Among 20 genotypes, VL-19403(66.8g) and VL-19465(65.5g) genotypes were found to be superior for grain yield per plant over the check (Shaktiman-5). High GCV and PCV were observed for grain yield per plant, number of grains per row, number of grain rows per cob, harvest index, cob weight, ear height and biological yield per plant. Maximum heritability conjoined with higher genetic advance for the traits grain yield per plant, plant height, ear height, harvest index, biological yield and cob weight. Grain yield per plant was significantly strong association with harvest index, number of grains per row, cob weight, cob girth, cob length, ear height at both levels. The trait days to 50% tasselling had high direct positive effect on grain yield per plant at genotypic level and biological yield per plant had high direct positive effect on grain yield per plant at phenotypic level.