African Journal of
Plant Science

  • Abbreviation: Afr. J. Plant Sci.
  • Language: English
  • ISSN: 1996-0824
  • DOI: 10.5897/AJPS
  • Start Year: 2007
  • Published Articles: 807

Full Length Research Paper

Grain yield and stability of selected early and medium duration cowpea in Ghana

Theophilus Kwabla Tengey
  • Theophilus Kwabla Tengey
  • Cowpea Improvement Program, CSIR-Savanna Agricultural Research Institute, P. O. Box 52, Nyankpala, Ghana.
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Emmanuel Yaw Owusu
  • Emmanuel Yaw Owusu
  • Cowpea Improvement Program, CSIR-Savanna Agricultural Research Institute, P. O. Box 52, Nyankpala, Ghana.
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Francis Kusi
  • Francis Kusi
  • Cowpea Improvement Program, CSIR-Savanna Agricultural Research Institute, P. O. Box 52, Nyankpala, Ghana.
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George Yakubu Mahama
  • George Yakubu Mahama
  • Cowpea Improvement Program, CSIR-Savanna Agricultural Research Institute, P. O. Box 52, Nyankpala, Ghana.
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Frederick Justice Awuku
  • Frederick Justice Awuku
  • Cowpea Improvement Program, CSIR-Savanna Agricultural Research Institute, P. O. Box 52, Nyankpala, Ghana.
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Emmanuel Kofi Sei
  • Emmanuel Kofi Sei
  • Cowpea Improvement Program, CSIR-Savanna Agricultural Research Institute, P. O. Box 52, Nyankpala, Ghana.
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Ophelia Asirifi Amoako
  • Ophelia Asirifi Amoako
  • Cowpea Improvement Program, CSIR-Savanna Agricultural Research Institute, P. O. Box 52, Nyankpala, Ghana.
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Mohammed Haruna
  • Mohammed Haruna
  • Cowpea Improvement Program, CSIR-Savanna Agricultural Research Institute, P. O. Box 52, Nyankpala, Ghana.
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  •  Received: 20 December 2020
  •  Accepted: 10 February 2021
  •  Published: 31 March 2021

Abstract

Changes in climate are a major driver for climate-smart crops with short duration on-field and adaptation to diverse growing conditions. This study evaluated the performance of nine early duration and 10 medium duration cowpea genotypes at six locations within the Guinea and Sudan savanna zones of Ghana. Genotypes for each maturity group were laid out in a Randomized Complete Block Design with three replications for each location. There were significant (p<0.001) genotype, environment and genotype x environment effects of the cowpea genotypes of both maturity groups for grain yield. Among the early duration cowpea tested, GGE biplot analysis revealed SARI-2-50-80, SARI-13-17-2, IT99K-1122, SARI-3-11-80, and IT07K-299-6, respectively, as having high yield and stable performance across the six test environments; and out-performed the check variety, Kirkhouse Benga. With the medium duration trials, IT86D-610, IT10K-837-1, and SARI-6-2-6 had high yields, which were comparable to the check, Padituya. IT10K-837-1 was the most stable and had a relatively shorter maturity period.  Grain yield performance of early duration cowpea was discriminated by three mega environments while only two mega environments discriminated grain yield of medium duration cowpea. The selected genotypes could be used in hybridizations or released as cowpea varieties in the country.

 

Key words: Genotype x environment, maturity period, multi-location, biplot analysis, genetic variability.

Copyright © 2024 Author(s) retain the copyright of this article.

This article is published under the terms of the Creative Commons Attribution License 4.0

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