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  1. 1 World News of Natural Sciences

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  1. 1 2025

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  1. 1 Adnan A. A.

  2. 1 Shittu E. A.

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Relationship Between Spectral Traits and Crop Vigour Scores to Grain Yield of Diverse Cowpea (Vigna unguiculata (L.) Walp.) Genotypes

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Adnan A. A., Shittu E. A.
World News of Natural Sciences
|
2025
|
vol. 58
150-162
EN
A field experiment was conducted at the Teaching and Research Farm of the Faculty of Agriculture, Bayero University Kano, during the 2023 dry season to determine the relationship between the leaf chlorophyll content and Normalized Difference Vegetation Index (NDVI) to grain yield among different cowpea genotypes. The treatments consisted of four diverse cowpea genotypes (IT90K-277-2, IT99K-573-1-1, UAM09-1046-6-2, and UAM09-1051-1) arranged in a randomized complete block design (RCBD) with three replications. Normalized Difference Vegetation Index (NDVI) and Soil-Plant Analysis Development (SPAD) were measured at different developmental stages to derive their relationships with grain yield. Data collected was subjected to a general analysis of variance (ANOVA). The results revealed a significant difference among the four cowpea genotypes for the measured traits. A positive and significant correlation was also observed among crop vigor score and grain yield at the different growth stages. The NDVI values measured during the different growth stages correlated significantly with the yield of all the genotypes, while SPAD had an inverse correlation with grain yield. It was concluded that the results could be used for the selection of genotypes based on SPAD and NDVI. Importantly, this study was limited to dry season evaluation where spectral parameters are at the minimum in the area under study.
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