Kouakou Et Al

Kouakou et al

Greener
Journal of Agricultural Sciences,
 Vol. 5 (5),
pp. 
190-203, September
2015.

ISSN: 2276-7770  

Research Paper

Abstract

 

Yam is an important food
crop in Côte d’Ivoire.
 Nevertheless, its production is facing many
constraints including the inability to distinguish cultivated varieties
from one another. Thus, different varieties and species are designated by the
same names from one region to the other and vice versa, the same varieties are
called differently. The absence of major descriptors, which are easy to use is
the main cause of this confusion. The objective of this study is to
propose agro-morphological descriptors easy to identify, for
a better determination of yam varieties of D. alata.
A total of 91 accessions of yam of D. alata species were used.
These accessions were observed using morphological parameter. Eight simple
agro-morphological descriptors which are easy to describe were identified as major dichotomous
keys for the determination of the D. alata species. These
characters have been selected based on the discrimination they permit to
operate. Using them, four varietal groups were formed: Pyramid, Douoblé,
 Brazo and Bêtê-Bêtê.

 

Keywords: Yam, Dioscorea alata, morphological
characterization, dichotomous keys, varietal groups.

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