Genetic Variability and Heritability Studies of Some Genotypes of Maize (zea Mays L.) in Mubi, Adamawa State

Agronomic and morphological techniques were used to evaluate the genetic variability of 25 genotypes of maize obtained from International Institute of Tropical Agriculture, Ibadan, Oyo State; Michika and Mubi, Adamawa State, Nigeria during 2018 and 2019 rainy season at the Food and Agricultural Organization/Tree Crop Production Research Farm, Adamawa State University, Mubi. The objectives of the study were: to determine the genetic variation among 25 genotypes of maize and to identify and select the most promising genotype(s) with respect to yield and yield related traits. Twenty - five genotypes of maize were evaluated in a Randomized Complete Block Design replicated three times. Twenty agronomic traits were collected: plant height, plant diameter, leaf width, leaves/plant, number of ears/plant, days to first and 50% tasseling, days to first and 50% silking, days to first and 50% maturity, cob length and diameter, kernel rows/cob and kernels/row. Other parameters collected include seed thickness, length and width, 100 grain weight and grain yield/hectare. The results revealed highly significant differences (P