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Response of Cowpea Genotypes to Drought Stress in Uganda

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dc.contributor.author Mwale, Saul Eric
dc.contributor.author Ochwo-Ssemakula, Mildred
dc.contributor.author Sadik, Kassim
dc.contributor.author Achola, Esther
dc.contributor.author Okul, Valentor
dc.contributor.author Gibson, Paul
dc.contributor.author Edema, Richard
dc.contributor.author Singini, Wales
dc.contributor.author Rubaihayo, Patrick
dc.date.accessioned 2022-11-22T09:42:49Z
dc.date.available 2022-11-22T09:42:49Z
dc.date.issued 2017
dc.identifier.citation Mwale, S.E., Ochwo- Ssemakula, M., Sadik, K., Achola, E., Okul, V., Gibson, P., Edema, R., Singini, W. and Rubaihayo, P. (2017). Response of Cowpea Genotypes to Drought Stress in Uganda. American Journal of Plant Sciences, 8, 720-733. https://doi.org/10.4236/ajps.2017.84050 en_US
dc.identifier.uri https://doi.org/10.4236/ajps.2017.84050
dc.identifier.uri http://repository.mzuni.ac.mw/handle/123456789/365
dc.description.abstract Moisture stress is a challenge to cowpea production in the drought prone areas of eastern and north eastern Uganda, with yield losses of up to 50% reported. Genotypes grown by farmers are not drought tolerant. This study was therefore, undertaken at Makerere University Agricultural Research Institute Kabanyolo to identify cowpea genotypes tolerant to drought. Thirty cowpea accessions comprising of Ugandan landraces and released varieties, Brazilian lines, Makerere University breeding lines, elite IITA germplasm and seven IITA drought tolerant lines as checks were screened for drought tolerance at vegetative and reproductive stages. The experiment was designed as a 2 × 37 factorial and laid out in a split-plot arrangement, 37 genotypes of cowpea at two soil moisture stress levels (T1, no stress and T2, severe stress) with all factorial combinations replicated two times in a screen house. The genotypes showed considerable variability in tolerance to drought. Genotypes were significantly different for chlorophyll content (P ≤ 0.01), efficiency of photosystem II (P ≤ 0.05), non-photochemical quenching (P ≤ 0.05), recovery (P ≤ 0.01), delayed leaf senescence (P ≤ 0.01), grain yield (P ≤ 0.01), 100 seed weight (P ≤ 0.05), number of pods per plant and number of seeds per pod (P ≤ 0.001). There was a high significant positive correlation between chlorophyll content and efficiency of photosystem II (r = 0.75, P ≤ 0.001) implying that chlorophyll content and efficiency of photosystem II could be used as efficient reference indicators in the selection of drought tolerant genotypes. Genotypes SECOW 5T, SECOW 3B, SECOW 4W, WC 30 and MU 24 C gave relatively high yields under stress and no stress conditions, maintained above mean chlorophyll content, efficiency of photosystem II and had good recovery scores from stress and thus were tolerant to drought stress induced at both vegetative and reproductive stages. en_US
dc.language.iso en en_US
dc.publisher Scientific research publishing en_US
dc.subject Drought Tolerance en_US
dc.subject Moisture Stress en_US
dc.subject Non-Photochemical Quenching en_US
dc.subject Split Plot en_US
dc.title Response of Cowpea Genotypes to Drought Stress in Uganda en_US
dc.type Article en_US


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