Maize (Zea mays L.) is an important cereal crop especially for developing countries like Pakistan where ever increasing population is facing the shortage of food. Maize along with other cereal crops can fulfill the future requirement of country. It gives more yields as compared to all other cereal crops. The material consisted of 20 genotypes was sown in randomized complete block design (RCBD) with two replications. Observations on following traits like Plant height, ear height, chlorophyll content, stem diameter, cob placement, cob length, cob diameter, rows/cob, kernels/row, total grains/cob, 100 -grain weight and grain yield per plant were recorded on maturity. Analysis of variance showed that all the genotypes were significantly different from each other for all the above parameters. Correlation and path coefficient analysis was applied to study association among different plant parameters and to study the direct and indirect effects of those parameters to grain yield per plant. The grain yield per plant had positive significant correlation with plant height, ear height, stem diameter, cob placement, cob length, cob diameter, rows per cob, total grains per plant and 100 -grain weight at the genotypic level. The path coefficient analysis showed that the traits like stem diameter, cob placement, cob length, kernels/row, 100grain weight had positive direct effect on grain yield per plant. While traits like plant height, ear height, chlorophyll content, cob diameter, rows per cob and total grains/cob exhibited negative direc t effect on grain yield per plant. The maximum positive direct effect on grain yield per plant was shown by 100-grain weight while maximum negative direct effect was shown by chlorophyll content.
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