Stability Stress and Adaptation Deviation from regression (S²di) Krishicode February 23, 2026 (Last updated: February 23, 2026) 1 minute read 0 comments Deviation from Regression (S²dᵢ) Eberhart & Russell Stability Model Formula: S²dᵢ = Σ(Y − Ŷ)² ÷ (n − 2) Overall Mean Yield (Ȳ) Regression Coefficient (bᵢ) Environment 1 – Yield (Y₁) Environment 1 – Index (I₁) Environment 2 – Yield (Y₂) Environment 2 – Index (I₂) Environment 3 – Yield (Y₃) Environment 3 – Index (I₃) Environment 4 – Yield (optional) Environment 4 – Index (optional) Calculate S²dᵢ S²dᵢ: — Interpretation: — Post navigation Previous: Stress Tolerance Index (STI)Next: Regression Coefficient (bᵢ) Calculator Leave a Reply Cancel replyYour email address will not be published. Required fields are marked *Comment * Name * Email * Website Save my name, email, and website in this browser for the next time I comment. Related Stories Stability Stress and Adaptation Multi-Location Mean Yield Calculator Krishicode February 23, 2026 0 Stability Stress and Adaptation Genotype × Environment Interaction Index Krishicode February 23, 2026 0 Stability Stress and Adaptation Regression Coefficient (bᵢ) Calculator Krishicode February 23, 2026 0
