Journal of
Plant Breeding and Crop Science

  • Abbreviation: J. Plant Breed. Crop Sci.
  • Language: English
  • ISSN: 2006-9758
  • DOI: 10.5897/JPBCS
  • Start Year: 2009
  • Published Articles: 409

Full Length Research Paper

GGE biplots to analyze soybean multi-environment yield trial data in north Western Ethiopia

Mulugeta Atnaf*
  • Mulugeta Atnaf*
  • Pawe Research Center, Ethiopian Institute of Agricultural Research, P. O. Box, 25, Pawe, Ethiopia.
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Sisay Kidane
  • Sisay Kidane
  • Pawe Research Center, Ethiopian Institute of Agricultural Research, P. O. Box, 25, Pawe, Ethiopia.
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Seltene Abadi
  • Seltene Abadi
  • Pawe Research Center, Ethiopian Institute of Agricultural Research, P. O. Box, 25, Pawe, Ethiopia.
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Zelalem Fisha
  • Zelalem Fisha
  • Pawe Research Center, Ethiopian Institute of Agricultural Research, P. O. Box, 25, Pawe, Ethiopia.
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  •  Accepted: 18 November 2013
  •  Published: 29 November 2013

Abstract

The study was undertaken with the objective to examine the nature and to quantify the magnitude of genotype x environment interaction effects on soybean [Glycine max (L.) Merr.] grain yield and to determine the winning genotype (s) for test environments in north western Ethiopia. The experiment was executed at four different locations of Ethiopia for two consecutive years (2007 and 2008) using thirty two genotypes including two checks. Randomized complete block design with three replicates was employed. The combined analysis of variance over environments explained soybean grain yield was significantly (p<0.001) affected by environments (25.58%), genotypes (14.87%) and genotype x environment interaction (59.55%). The result depicted differential performance of soybean genotypes at different test environments and hence the interaction was crossover type. The genotype main effect plus genotype x environment interaction (GGE) biplots were applied to analyze and visualize pattern of the interaction component. The first two principal components (PC1 and PC2) of the GGE explained 63.4% with PC1=41.6 and PC2=21.8 of the GGE sum of squares using environment standardized model. Genotypes, G13 (TGX-1998-29F), G3 (TGX-849-313D), and G7 (TGX-1889-29F) combined both high mean yield and high stability performance across the test environments and could be characterized as an ideal genotypes.
 
Key words:  Glycine max, genotype plus genotype x environment interaction (GGE), Ethiopia, stability, yield.