STUDY OF THE GENETIC DIVERSITY OF SOME GENOTYPES OF MAIZE UNDER TWO LEVELS OF NITROGEN FERTILIZATION

The present study aimed to determine the genetic divergence of seven maize genotypes (Al-Maha, Sumer, Al-Fajr, Baghdad, 5018, 4 × 1 single hybrid, and 2 hybrid) under two varied levels nitrogen fertilization (92 276 kg N ha-1). experiment occurred in 2022 a randomized complete block design (RCBD) with split-plot arrangement three replications at College Agricultural Engineering Sciences, University Iraq. served as main plots, allocated subplots. results revealed that variance was higher than environmental for most traits, coefficient phenotypic variation close fertilization. Heritability (broad sense) 92 ha-1 (N1 level) highest traits. i.e., ear height, grains per row, ear, individual plant yield, yield unit area, days 50% male flowering, leaf length, rows 100-grain weight, values 92.556%, 90.760%, 90.123%, 95.007%, 88.976%, 89.974%, 88.748%, 85.521%, 89.690%, respectively. For level (N2 level), heritability broad sense high viz., flowering (91.546%), height (96.150%), (91.038%), length (92.454%), (98.108%), area dry weight (85.488%). cluster analysis divided into four five groups ha-1, These different could be due among resulting from their makeup origin.