Abstract
Seven statistical procedures including; simple correlation, path analysis, multiple linear regression, stepwise regression, factor analysis, principal components and cluster analysis were used to study the relationship between wheat grain yield and its components under drought conditions of Saudi Arabia. Results revealed that number of spikes/m
2, 100-grain weight, weight of grains/spike and biological yield were the most effective variables influencing grain yield. Based on the results, it is reasonable to assume that high yield of wheat plants under drought conditions could be obtained by selecting breeding materials with high spikes/m
2, 100-grain weight, weight of grains/ spike and biological yield.