Genetic variability, inter-character correlation, and stability performance in cowpea for drought tolerance
Drought has consistently threatened cowpea [Vigna unguiculata (L.) Walp] production, and it has become important to identify drought-tolerant, stable, and high-yielding accessions from cowpea germplasm to accelerate breeding of new drought-tolerant varieties for sub-Saharan Africa (SSA). This study...
| Main Authors: | , , , , , , |
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| Format: | Journal Article |
| Language: | Inglés |
| Published: |
2025
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| Online Access: | https://hdl.handle.net/10568/176459 |
| _version_ | 1855516124961046528 |
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| author | Sansa, O. Ariyo, O.J. Ayo-Vaughan, M.A. Ekanem, U.O. Ntukidem, S. Abberton, M.T. Oyatomi, O. |
| author_browse | Abberton, M.T. Ariyo, O.J. Ayo-Vaughan, M.A. Ekanem, U.O. Ntukidem, S. Oyatomi, O. Sansa, O. |
| author_facet | Sansa, O. Ariyo, O.J. Ayo-Vaughan, M.A. Ekanem, U.O. Ntukidem, S. Abberton, M.T. Oyatomi, O. |
| author_sort | Sansa, O. |
| collection | Repository of Agricultural Research Outputs (CGSpace) |
| description | Drought has consistently threatened cowpea [Vigna unguiculata (L.) Walp] production, and it has become important to identify drought-tolerant, stable, and high-yielding accessions from cowpea germplasm to accelerate breeding of new drought-tolerant varieties for sub-Saharan Africa (SSA). This study assessed 112 cowpea accessions for drought tolerance and yield stability across three locations in 2 years using an 8 × 14 Alpha lattice design replicated thrice. Data collected were subjected to combined analysis of variance, broad-sense heritability, phenotypic, and genotypic correlations. Yield stability was assessed through the Additive Mean and Multiplicative Interaction (AMMI) and Genotype and Genotype × Environment (GGE) Biplot techniques. Significant variations were found among the accessions across the test environments for measured traits and reduction of grain yield due to water-stress. Genotypic correlations were higher in all the locations and environments. AMMI and GGE Biplot analysis both identified TVu-74 as the highest yielding accession and TVu-9913 as the most stable accession. Notable differences in response to drought stress indicated genetic variability and allowed the selection of drought tolerant accessions. The identified high-yielding and stable accessions could serve as potential parents in breeding climate-resilient cowpea varieties for SSA. |
| format | Journal Article |
| id | CGSpace176459 |
| institution | CGIAR Consortium |
| language | Inglés |
| publishDate | 2025 |
| publishDateRange | 2025 |
| publishDateSort | 2025 |
| record_format | dspace |
| spelling | CGSpace1764592025-12-08T09:54:28Z Genetic variability, inter-character correlation, and stability performance in cowpea for drought tolerance Sansa, O. Ariyo, O.J. Ayo-Vaughan, M.A. Ekanem, U.O. Ntukidem, S. Abberton, M.T. Oyatomi, O. germplasm climate resilience genotype environment interaction food security sub-Saharan Africa Drought has consistently threatened cowpea [Vigna unguiculata (L.) Walp] production, and it has become important to identify drought-tolerant, stable, and high-yielding accessions from cowpea germplasm to accelerate breeding of new drought-tolerant varieties for sub-Saharan Africa (SSA). This study assessed 112 cowpea accessions for drought tolerance and yield stability across three locations in 2 years using an 8 × 14 Alpha lattice design replicated thrice. Data collected were subjected to combined analysis of variance, broad-sense heritability, phenotypic, and genotypic correlations. Yield stability was assessed through the Additive Mean and Multiplicative Interaction (AMMI) and Genotype and Genotype × Environment (GGE) Biplot techniques. Significant variations were found among the accessions across the test environments for measured traits and reduction of grain yield due to water-stress. Genotypic correlations were higher in all the locations and environments. AMMI and GGE Biplot analysis both identified TVu-74 as the highest yielding accession and TVu-9913 as the most stable accession. Notable differences in response to drought stress indicated genetic variability and allowed the selection of drought tolerant accessions. The identified high-yielding and stable accessions could serve as potential parents in breeding climate-resilient cowpea varieties for SSA. 2025 2025-09-11T11:31:19Z 2025-09-11T11:31:19Z Journal Article https://hdl.handle.net/10568/176459 en Open Access application/pdf Sansa, O.O., Ariyo, O.J., Ayo-Vaughan, M.A., Ekanem, U.O., Ntukidem, S.O., Abberton, M.T., & Oyatomi, O.A. (2025). Genetic variability, inter-character correlation, and stability performance in cowpea for drought tolerance. Journal of Crop Improvement, 39, (1): 43-68. |
| spellingShingle | germplasm climate resilience genotype environment interaction food security sub-Saharan Africa Sansa, O. Ariyo, O.J. Ayo-Vaughan, M.A. Ekanem, U.O. Ntukidem, S. Abberton, M.T. Oyatomi, O. Genetic variability, inter-character correlation, and stability performance in cowpea for drought tolerance |
| title | Genetic variability, inter-character correlation, and stability performance in cowpea for drought tolerance |
| title_full | Genetic variability, inter-character correlation, and stability performance in cowpea for drought tolerance |
| title_fullStr | Genetic variability, inter-character correlation, and stability performance in cowpea for drought tolerance |
| title_full_unstemmed | Genetic variability, inter-character correlation, and stability performance in cowpea for drought tolerance |
| title_short | Genetic variability, inter-character correlation, and stability performance in cowpea for drought tolerance |
| title_sort | genetic variability inter character correlation and stability performance in cowpea for drought tolerance |
| topic | germplasm climate resilience genotype environment interaction food security sub-Saharan Africa |
| url | https://hdl.handle.net/10568/176459 |
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