In order to understand gene actions for sodicity tolerance, grain yield and its components in rice, six basic generations (P₁, P₂, F₁, F₂, BC₁ and BC₂) were evaluated in a target environment. Based on combining ability and heterosis studies, five hybrids viz., FL 478 / IR 64, BPT 5204 / IR 64, RNR 57979 / FL 478, TETEP / FL 478 and TETEP / BPT 5204 were selected to undertake generation means analysis. In selected crosses, using F₁s as female parents and respective two parents (P1 and P2) as male parents, back crosses viz., BC₁ (F₁ / P₁) and BC₂ (F₁ / P₂) were effected. Thus, all six generations viz., P₁, P₂, F₁, F₂, BC₁ and BC₂ were built up in each five selected cross combinations. The 14 physio-morphological traits recorded were days to 50 percent flowering, plant height, number of productive tillers per plant, panicle length, number of filled grains per panicle, spikelet fertility percentage, 100-grain weight, single plant yield, dry root weight, dry shoot weight, root: shoot ratio, Na⁺: K⁺ ratio, chlorophyll content and proline content. Generation means analysis of the data revealed that all these traits exhibit significant non-allelic interactions and suggest that complex epistatic interactions are more important in controlling sodicity tolerance traits.