O. Souleymane, M. Salifou, M. Hamidou, S. Amir Rice, selection, stability, genotypes, interaction 2-9 8(1) 2024 January 2024 Selection index is effective selection criterion that has often been used in many breeding programs for diverse crops including rice. Ten (10) rice promising lines and a local check were assessed for yield, selection index and selection index stability over 3 locations in southern west of Niger republic. The experimental design was a randomised complete bloc design with three replications. Genotypes showed good performances in terms of yield, yield components and index selection. 3 different mega environments were observed with the two being close and slightly overlapped. The ideal environment to screen for high index selection was the environment 1. The genotypes TXD 88, WAB 2101-WAC4-1-TGR1-WAT B6 and Gambiaka performed well in environment 3 and 1, while the winners in environment 2 were genotypes WAB 2056-1-FKR-4, WAB 2056-2-FKR2-5-TGR1-B and JARIBU 220. The most stable genotypes across environments were WAB 2076-WAC2-TGR1-B, TXD 88, WAB 2101-WAC4-1-TGR1-WAT B6, L-22-26-WAC B-TGR4-B and WAB 2125-WAC B-1-TGR3-WAT B8, while the ideal was the genotype WAB 2101-WAC4-1-TGR1-WAT B6. These varieties are promising candidates for farmer’s adoption and release.