Assessment of Some Cowpea (Vigna unguiculata L.) Genotypes for Quantitative and Qualitative Traits

  • Q. O. Oloyede-Kamiyo
  • B. O. Lawal
  • K. T. Kareem
  • O. O. Odeyemi
  • O. J. Adelakun
Keywords: Cowpea (Vigna unguiculata), crop improvement, improved varieties, landrace, mineral composition


The qualitative and quantitative traits, as well as nutritional composition of six cowpea genotypes were assessed to determine their worth for improvement purposes. The experiment was conducted at the research site of the Institute of Agricultural Research and Training (IAR&T) Ibadan in 2018 and 2020. The genotypes comprised of three improved varieties and three landraces. The experiment was laid out in a randomized complete block design in three replicates. Combined analysis of variance, means, coefficient of variation, and correlation analysis were conducted on the data collected. Mean squares for year and genotype were significant for most of the traits. Virus incidence and severity were significantly higher in ART/98-12 and least in Cotonou. Number of pods per peduncle was highest in Ife BPC (5) and least in Cotonou (2). Number of days to 50% flowering was least in Cotonou and ART/98-12 (46 days). Seed weight per plot was highest in Cotonou (0.35kg/m2) and least in Oloyin (0.003kg/m2). Crude protein was significantly higher in Oloyin (23.92%) and least in ART/98-12 (21.15%). Calcium, magnesium and potassium were highest in Cotonou. Cotonou, a landrace, is a promising genotype for improvement for yield and earliness.


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eISSN: 0300-368X