Journal of Innovative Agriculture, Volume 8, Issue 2 : 52-58. Doi : 10.37446/jinagri/rsa/8.2.2021.52-58
Research Article

OPEN ACCESS | Published on : 30-Jun-2021

Genotype x environment interaction and stability of drought tolerant durum wheat

  • Alemayehu Zemede Lemma
  • Ethiopian Institute of Agricultural Research (EIAR), Addis Ababa, Ethiopia.
  • Firew Mekbib
  • Haromaya University, P.O.Box:138, Dire-Dawa, Ethiopia.

Abstract

Genotype x environment interaction is of great interest for selecting cultivars for variable environment. The objectives were to evaluate presence of genotype by environment interactions and identify stable genotypes using different stability parameters. Twenty five selected durum wheat genotypes grown in randomized complete block design with three replications over six environments in main rainy season. The combined analysis of variance indicated that highly significant variations among genotypes, environments and their interactions on grain yield. The largest variation was accounted by environments, followed by GEI and then genotypes. The stability analysis using parametric measures identified G-24 as the most stable genotype followed by G-23 with above average grain yield. Stability parameters showed similar rankings of genotypes with different magnitudes and identified Genotypes 1, 24, 4, 10 and 17 as the most stable genotypes. As per the AMMI analysis the first two IPCAs showed significant variations and explained about 61% of GEI. GGE biplot categorized the environments in to two mega environments where Akaki and Gimbichu grouped together and that of Debre-Zeit light and black soil and Alemtena in the second mega environment and Minjar remained alone.

Keywords

AMMI, ASV, durum wheat, biplot, stability

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