International Journal of
Biodiversity and Conservation

  • Abbreviation: Int. J. Biodivers. Conserv.
  • Language: English
  • ISSN: 2141-243X
  • DOI: 10.5897/IJBC
  • Start Year: 2009
  • Published Articles: 625

Full Length Research Paper

Relationship between flower, immature pod pigmentation and seed testa of cowpea

K. F. Egbadzor1*, I. Amoako-Attah2, E. Y. Danquah1, S. K. Offei3, K. Ofori4 and Opoku-Agyeman M. O.5
  West Africa Centre for Crop Improvement, University of Ghana, Accra, Ghana. 2Cocoa Research Institute of Ghana, New-Tafo, Eastern Region, Ghana. 3College of Agriculture and Consumer Sciences, University of Ghana, Accra, Ghana. 4Crop Science Department, University of Ghana, Accra, Ghana. 5Council for Scientific and Industrial Research (CSIR) – Plant Genetic Resources Research Institute (PGRRI), Bunso, Eastern Region, Ghana.
Email: [email protected]

  •  Accepted: 09 July 2012
  •  Published: 30 September 2012



Seed testa colour is the first morphological lead to the recognition of preferred cowpea varieties. Differences among a population of four segregated lines of a cowpea accession were examined at the CSIR – PGRRI experimental fields during 2010. These four lines descended from cowpea accession Gh4524 and are distinguished based on their grain testa colour. The different grain coat colours were examined in relation to flower colour and immature pod pigmentation. It was observed that definite relationship existed between these traits in the cowpea lines studied. The lines segregated from the original population in the ratio, 9:3:3:1. Heterozygosity decreased by 30% from the S0 to S1. The result of the experiment demonstrates that some land races under conservation are mixtures of pure lines. Effort to prevent the loss of genetic diversity in such germplasm is recommended.


Key words: Cowpea, coat colour, heterozygosity, germplasm, pigmentation.