Vol. 35 No. 3 (2021): Advances in Horticultural Science
Articles

Genetic diversity in Colocasia esculenta and Xanthosoma mafaffa in Togo, West Africa

D. Bammite
Laboratoire de Physiologie et Biotechnologie Végétale, Faculté des Sciences, Université de Lomé, Boulevard Gnassingbé Eyadema, 01BP1515 Lomé, Togo.
P.J. Matthews
National Museum of Ethnology, Senri Expo Park 10-1, Osaka 565-8511, Japan.
Y.D. Dagnon
Laboratoire de Physiologie et Biotechnologie Végétale, Faculté des Sciences, Université de Lomé, Boulevard Gnassingbé Eyadema, 01BP1515 Lomé, Togo.
A. Agbogan
Laboratoire de Physiologie et Biotechnologie Végétale, Faculté des Sciences, Université de Lomé, Boulevard Gnassingbé Eyadema, 01BP1515 Lomé, Togo.
P. Agre
International Institute of Tropical Agriculture (IITA), Bioscience Center, PMB 5320, Oyo Road, Ibadan, Nigeria.
T.O. Akintayo
International Institute of Tropical Agriculture (IITA), Bioscience Center, PMB 5320, Oyo Road, Ibadan, Nigeria.
K. Odah
Laboratoire de Physiologie et Biotechnologie Végétale, Faculté des Sciences, Université de Lomé, Boulevard Gnassingbé Eyadema, 01BP1515 Lomé, Togo.
A. Dansi
Université Polytechnique d’Abomey, Faculté des Sciences et Techniques de Dassa, Laboratoire de Biotechnique, Ressources Génétiques et Amélioration des Espèces Animales et Végétales (BIORAVE), Bénin.
M. Abberton
International Institute of Tropical Agriculture (IITA), Bioscience Center, PMB 5320, Oyo Road, Ibadan, Nigeria.
K.S. Tozo
Laboratoire de Physiologie et Biotechnologie Végétale, Faculté des Sciences, Université de Lomé, Boulevard Gnassingbé Eyadema, 01BP1515 Lomé, Togo.
Published July 9, 2021
Keywords
  • Crop diversity,
  • new cocoyam,
  • SSR,
  • taro,
  • Togo
How to Cite
Bammite, D., Matthews, P. J., Dagnon, Y. D., Agbogan, A., Agre, P., Akintayo, O. T., Odah, K., Dansi, A., Abberton, M., & Tozo, K. S. (2021). Genetic diversity in Colocasia esculenta and Xanthosoma mafaffa in Togo, West Africa. Advances in Horticultural Science, 35(3), 255-267. https://doi.org/10.36253/ahsc-9689

Funding data

Abstract

Taro and new cocoyam are root and leaf crops commonly grown in tropical to warm temperate regions. In Togo, they are neglected and underutilised. Here we report the genetic diversity of 26 accessions of taro and 101 accessions of new cocoyam. Analysis of simple sequence repeats revealed low polymorphic information content of 0.43 and 0.25 in taro and new cocoyam, respectively. PCA scatterplots and Neighbour Joining dendrograms based on the SSR data clustered accessions into groups that more-or-less correspond to morphological diversity in both species. AMOVA within and between morphological groups revealed greater variances within groups than between. This indicates weak genetic differentiation between morphological groups, particularly for taro. Genetic diversity was greater among taro cultivars. Taro has a longer history of introduction and dispersal in Africa, and has had more opportunity for multiple introduction and local cultivar development. Different strategies are suggested for future development of these crops in Togo and Africa. For taro, further studies of existing diversity and recent experimental introduction, has spread widely in Africa with little genetic diversity. For this crop, international collaboration is needed to clarify taxonomy,  and to introduced further cultivars for evaluation under local conditions in Africa.

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