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Effect of water deficit at different stages of development on the yield components of cowpea (Vigna unguiculata L. Walp) genotypes

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Relation http://oar.icrisat.org/10622/
http://dx.doi.org/10.5897/AJB2017.16347
10.5897/AJB2017.16347
 
Title Effect of water deficit at different stages of
development on the yield components of cowpea
(Vigna unguiculata L. Walp) genotypes
 
Creator Abdoul Karim, T D
Sanoussi, A
Maârouhi, I M
Falalou, H
Yacoubou, B
 
Subject Cowpea
Crop Yield
Genetics and Genomics
Water Resources
Legume Crops
 
Description Cowpea cultivation is widespread in West Africa where it is an important source of protein. This study
is aimed at determining the effects of water deficit applied at different stages of cowpea development
on yield and its components (pod number, seed number, seed yield, aerial biomass yield, harvest index
and root biomass of the plant). The experiments were carried out in pots during the rainy season of
2016 under natural conditions of illumination, temperature and relative humidity. Three water regimes
were applied to plants at different stages of cowpea development: total suspension of watering at
flowering phase (43 days after sowing) (S1); suspension of watering at the beginning of pod formation
on the 46th day after sowing (S2); and normal watering as control until harvest (S0). At the water regime
level, yield components had higher values in S0 followed by S2. The lowest values were obtained at S1
level. The root to aerial biomass ratios was higher under water deficit than in the control. In conditions
of water deficiency, Suvita2, IT96D-610, and ISV128 genotypes gave the highest seed yields and Tiligré
the lowest yield. The harvest index showed a genotypic variation according to the water regime. Suvita2
and ISV128 gave the best harvest index in all water regimes. This study may have contributed to the
selection of genotypes adapted to drought.
 
Publisher Academic Journals
 
Date 2018-02-28
 
Type Article
PeerReviewed
 
Format application/pdf
 
Language en
 
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Identifier http://oar.icrisat.org/10622/1/Toudou%20et%20a.%202018_water%20stress%20stages%20of%20cowpea%20genotypes.pdf
Abdoul Karim, T D and Sanoussi, A and Maârouhi, I M and Falalou, H and Yacoubou, B (2018) Effect of water deficit at different stages of development on the yield components of cowpea (Vigna unguiculata L. Walp) genotypes. African journal of biotechnology, 17 (9). pp. 279-287. ISSN 1684-5315