Genetic variation for plant architecture and yield components is essential for maize (Zea mays L.) improvement. This study assessed variation among 20 maize genotypes at the University of Agriculture, Faisalabad, during spring 2023, using a randomized complete block design with three replications. Ten traits were recorded: plant height, ear height, stem diameter, internodal length, cob length, rows per cob, seeds per row, 100-grain weight, cob diameter, and pith diameter. Data were analyzed by ANOVA, means were separated with Tukey's HSD test, and Pearson correlations were calculated among traits. Genotypes differed significantly (P < 0.01) for all traits. Stem diameter was strongly and positively correlated with plant height (r = 0.7664) and ear height (r = 0.6969), while 100-grain weight showed only weak positive correlations with cob length (r = 0.1559) and seeds per row (r = 0.0848). Genotype 2014 Sib had the highest plant height, ear height, and stem diameter. Genotype 113 had the highest 100-grain weight, cob diameter, and pith diameter. PBG3 (X) had the longest internodes, 6160 (X) the longest cobs, 110 the most rows per cob, and 129 the most seeds per row. Genotype 113 is a good option where high grain weight and large cobs are wanted, and 2014 Sib is a good option where tall plants with thick stems are needed. These results come from a single season, so they should be confirmed across more environments.
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