African Journal of
Plant Science

  • Abbreviation: Afr. J. Plant Sci.
  • Language: English
  • ISSN: 1996-0824
  • DOI: 10.5897/AJPS
  • Start Year: 2007
  • Published Articles: 707

Article in Press

Genotype x environment interaction and grain yield stability of maize (Zea mays L.) hybrids tested in multi-environment trials at mid-altitude sub-humid agro-ecology of Ethiopia.

Belay Garoma, Sintayehu Alamirew, Bitew Tilahun, Zelalem Tafa, Temesgen Chibsa, and Berhanu Tadesse

  •  Received: 28 May 2019
  •  Accepted: 06 August 2019
Testing of genotypes in multi-environments is an important to estimate genotype x environment interaction (GEI) and identify stable genotypes with superior performance. The study was to evaluate different maize hybrids at multi-environments as well as to identify high yielding and stable maize hybrids. Twenty maize hybrids were tested across eight environments in a randomized complete block design in the 2015 cropping season. Combined analysis of variance and AMMI analysis showed that genotype, environment and GEI effect were highly significant (p < 0. 01) for grain yield. Genotype, environment and GEI explained 6.62, 84.87 and 4.50% of the total experimental variations, indicating the importance of environment for variations in maize grain yield. Mean grain yield of tested hybrids ranged from 4.98 t ha-1 in G2 to 7.51 t ha-1 in G16 As evident from significant GEI, performances of the hybrids were inconsistent across environments indicated that suitable to specific environment. Rank of hybrids using GGE biplot indicated that G18 (BH 546) had high grain yield and more stable across tested environments. This study identified maize hybrids with high grain yield and stable across environments that need to be further validated for possible new maize variety release and / or commercial production.

Keywords: Genotype x Environment Interaction, stability, yield, GGE biplot