Varietal differences in seed germination and seedling vigour characteristics in local and improved cowpea genotypes

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Research Paper 06/08/2023
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Varietal differences in seed germination and seedling vigour characteristics in local and improved cowpea genotypes

Olasoji Julius Oluseyi, Olosunde Adam Akinloye, Koh John Ochoche
Int. J. Agron. Agri. Res.23( 2), 20-27, August 2023.
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An experiment was conducted using twenty-two (accession, local and improved) cowpea genotypes evaluated for their laboratory seed quality attributes. The laboratory experiment was set-up in a complete randomized design with three replicates between February and March, 2023 at the Institute of Agricultural Research and Training, Obafemi Awolowo University, Moor Plantation, Ibadan, Oyo State. Data collected on seed quality attributes in the laboratory were subjected to analysis of variance. Treatment means were separated using Duncan Multiple Range Test at 5 % level of probability, correlation, and principal component analysis. Germination percentage ranged from 94.0 % for NGB07614 to 31.33 % for NGB07593. Germination percentage also had highly significant negative correlation with germination index, abnormal seedling, dead seed and seedling dry weight. Germination percentage also had positive and significant correlation with root length and seedling vigour index. Principal component analysis revealed that the seed quality attributes such as germination percentage, germination index, seedling vigour index, shoot length, root length and seedling dry weight contribute significantly to the variation within the 22 genotypes of cowpea evaluated. The cluster analysis for seed quality attributes included in this study placed cowpea genotypes into four clusters with sub clusters for each, except cluster four with only three genotypes of one accession, one local and one improved, respectively. The mean performance of laboratory seed quality attributes revealed that NGB07614, Abewere, 150-Ex and Modupe were outstanding in some of seed quality attributes. This shows that selection for superior seed quality traits is possible among these cowpea accessions.


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