Vol. 11, Issue 12 (2022)

The goal of the current study was to better understand the type and extent of gene action in tomato for different yield and yield contributing traits. Twelve different lines of tomato were crossed in diallel fashion (excluding reciprocals) and tested for gene action investigations in three different environments. Analysis of variance of the components of genetic variation revealed that the additive variance component (D) and those of dominance components (H₁ and H₂) were found to be significant in all environments and data pooled over environments. This demonstrates how both additive and non-additive gene action are involved in the inheritance of characteristics. Hence, reliance should be placed on the development of superior lines with several desirable genes.