African Journal of
Biotechnology

  • Abbreviation: Afr. J. Biotechnol.
  • Language: English
  • ISSN: 1684-5315
  • DOI: 10.5897/AJB
  • Start Year: 2002
  • Published Articles: 12182

Full Length Research Paper

Evaluation of the diversity in qualitative traits of Bambara groundnut germplasm (Vigna subterranea (L.) Verdc.) of Côte d’Ivoire

Beket Séverin BONNY
  • Beket Séverin BONNY
  • Breeding and Crop Husbandry Unit, Faculty of Natural Sciences, Nangui Abrogoua University, 02 BP 801, Abidjan 02, Côte d’Ivoire.
  • Google Scholar
Dagou SEKA
  • Dagou SEKA
  • Breeding and Crop Husbandry Unit, Faculty of Natural Sciences, Nangui Abrogoua University, 02 BP 801, Abidjan 02, Côte d’Ivoire.
  • Google Scholar
Koffi ADJOUMANI
  • Koffi ADJOUMANI
  • Breeding and Crop Husbandry Unit, Faculty of Natural Sciences, Nangui Abrogoua University, 02 BP 801, Abidjan 02, Côte d’Ivoire.
  • Google Scholar
Kouamé Guillaume KOFFI
  • Kouamé Guillaume KOFFI
  • Breeding and Crop Husbandry Unit, Faculty of Natural Sciences, Nangui Abrogoua University, 02 BP 801, Abidjan 02, Côte d’Ivoire.
  • Google Scholar
Léonie Clémence KOUONON
  • Léonie Clémence KOUONON
  • Breeding and Crop Husbandry Unit, Faculty of Natural Sciences, Nangui Abrogoua University, 02 BP 801, Abidjan 02, Côte d’Ivoire.
  • Google Scholar
Raoul Sylvère SIE
  • Raoul Sylvère SIE
  • Breeding and Crop Husbandry Unit, Faculty of Natural Sciences, Nangui Abrogoua University, 02 BP 801, Abidjan 02, Côte d’Ivoire.
  • Google Scholar


  •  Received: 31 October 2018
  •  Accepted: 14 December 2018
  •  Published: 02 January 2019

Abstract

The objectives of this study were to assess phenotypic diversity of Bambara groundnut germplasm from Côte d’Ivoire using qualitative traits and to understand the genetic diversity at different levels. Hundred and one accessions collected from four agro-ecological zones (central, eastern, northern, western) were characterized in a randomised complete block design with three replications. Thirteen qualitative traits were recorded from seedling emergence to physiological maturity of the crop species. All recorded traits were found to be polymorphic with three or four phenotypic classes. The results revealed a considerable amount of phenotypic variation in the germplasm studied. The phenotypic variation was expressed in color, shape, texture, flexibility, growth habit, pilosity and hardness in both the aerial organs and the underground pods. Cluster analysis grouped together accessions into six genetically distinct groups independently to their geographical origin, suggesting seeds exchanges between growing-zones. The chi-square analysis highlighted the presence of phenotypic variability within and between accessions from each agro-climatic zone for most of the traits evaluated indicating some adaptive forms related to the four zones. Estimates of Shanon-Weaver diversity index (H’) for all agro-climatic zones ranged from 0.32 to 0.66 with a mean of 0.46. The northern zone appeared phenotypically more diversified (H' = 0.66) than the others. These results are useful to ensure efficient germplasm collection, conservation and management strategies.

 

Key words: Bambara groundnut, accession, agroclimatic zones, phenotypic diversity, qualitative traits.