Efficiency of Parametric and Non Parametric Indices as the Indicators of Grain Yield Stability of Bread Wheat (Triticum aestivum L.) Genotypes under Rainfall Conditions

Background: Under rainfall conditions, grain yield stability is one of the most important objectives breeding programs, especially in diverse environments. such analysis offers best solution for relative performance genotypes over The aims this study are selection adapted and stable bread wheat based on using some parametric non-parametric index. Methods: experiment was conducted during four consecutive agricultural seasons (2016/17-2017/18, 2018/19 2019/20) at level experimental station Setif (ITGC). Eight (08) were tested study. To calculate indices, we use STABILITYSOFT program. Result: association between Wricke’s ecovalence (Wi²), mean variance component (θᵢ) Stability (σ²ᵢ) indices with proved that growing under these conditions G1, G2, Hidhab, Arz, Wifak Ain Abid. In addition, index combination highest non G2 more semi-arid conditions. static dynamic concepts, bi CVi related to concept, while other associated concept. Overall, results confirmed Non-parametric methods suitable tools identify various environmental