An experiment was conducted to study the variability parameters, correlations and path coefficients for nine metric traits in the F2 populations of 28 crosses derived through Diallel Mating System in tetraploid wheat. Significant genotypic differences were observed for all the traits studied indicating considerable amount of variation generated in the segregating population for each character. The highest genotypic and phenotypic coefficient of variation was observed for yield per plant followed by productive tillers per plant. Similarly, high heritability and genetic advance were also observed for these traits along with spike length and days to 50 per cent flowering indicating the scope for their improvement through simple selection. Positive and significant correlation of yield per plant with spike length and productive tillers per plant was observed, while days to 80 per cent maturity showed negative and significant association with spike length, plant height and protein content. Spike length showed the highest positive direct effect on yield per plant followed by productive tillers per plant. Spike length via productive tillers per plant had the highest indirect positive effect on yield per plant.