African Journal of
Agricultural Research

  • Abbreviation: Afr. J. Agric. Res.
  • Language: English
  • ISSN: 1991-637X
  • DOI: 10.5897/AJAR
  • Start Year: 2006
  • Published Articles: 6214

Full Length Research Paper

Genotype×environment interaction and stability analysis of soybean genotypes for yield and yield components across two locations in Nigeria

Jandong, E. A.
  • Jandong, E. A.
  • Department of Agronomy, Taraba State University, P. M. B. 1167, Jalingo, Taraba State, Nigeria.
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Uguru, M. I.
  • Uguru, M. I.
  • Department of Crop Science, Faculty of Agriculture, University of Nigeria, Nsukka, Enugu State, Nigeria.
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Okechukwu, E. C.
  • Okechukwu, E. C.
  • Department of Crop Science, Faculty of Agriculture, University of Nigeria, Nsukka, Enugu State, Nigeria.
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  •  Received: 26 June 2019
  •  Accepted: 03 October 2019
  •  Published: 30 November 2019

Abstract

A multilocational evaluation of 20 soybean genotypes was conducted in two distinct locations (Nsukka in Derived Savanna agro-ecology and Jalingo in northern Guinea Savanna) of Nigeria in 2015 and 2016 cropping seasons. The main objective of this study was to assess the genotype-by-environment interaction (G x E) for specific traits such as number of pods, pod weight, seed yield and yield stability. The results revealed highly significant differences among the genotypes and locations for all the traits except for seed yield. Genotype by environment interaction was not significant for all the traits except for days to 50% flowering indicating relative consistency in time of flowering among the genotypes across the locations and year. The genotype, Ashuku produced the highest yield in the two locations. However, the most stable genotypes across the locations were Dadinkowa and Vom while the ideal environments were Jalingo 2016 (ENV2) and Nsukka 2016 (ENV4) which produced 14.0 and 14.5 g, respectively. Similarly, Akwanga was discriminated as the overall best genotype across the two locations.

Key words: Genotype, biplot, environment, yield stability.