# Phenotypic stability and adaptability of wheat genotypes under organic and conventional farming systems over five years using AMMI and GGE biplot analysis

## TL;DR

This study compares the performance of seven wheat varieties under organic and conventional farming over five years to find stable and high-yielding types.

## Contribution

The study introduces a five-year comparative analysis of wheat genotypes under organic and conventional systems using AMMI and GGE biplot methods.

## Key findings

- Genotype IC8 showed the highest yield and stability, especially under organic conditions.
- Sids_12 and LOCAL were found to be unstable and less adaptable.
- P5 and IC17 performed well under conventional farming.

## Abstract

Organic agriculture is recognized for its sustainability, although it typically yields less than conventional systems. This study evaluated seven elite wheat genotypes (Triticum aestivum L.) over five years in a randomized complete block design with three replications, under both organic and conventional fertilization conditions. Integrated analyses using the AMMI model and GGE biplot revealed the significant effects of genotype, environment, and their interactions. The AMMI analysis showed that genotype IC8 achieved the highest mean yield (1.868 t ha-1) and the lowest AMMI stability value (ASV=0.474). This low ASV suggests high stability, indicating broad adaptability, especially under organic conditions. In contrast, Sids_12 (mean = 1.492 t ha-1; ASV=2.017) and LOCAL (mean = 1.304 t ha-1) exhibited great instability and specific adaptation. GGE biplot analysis explained 75.46% of the total variation (PC1 = 57.09%, PC2 = 18.37%), further confirming IC8’s stable performance across both systems while identifying P5 and IC17 as particularly responsive under conventional fertilization. These findings provide a basis for selecting wheat genotypes that balance high yield and stability, informing breeding strategies for sustainable crop production in both organic and conventional systems.