Temegne Et Al

Temegne et al

Greener Journal of Agricultural Sciences Vol. 6 (7), pp. 209-225, August 2016.

 ISSN: 2276-7770 

Research Paper

Manuscript Number: 062716107


(DOI: http://doi.org/10.15580/GJAS.2016.8.062716107)

 

Agro-morphological
Characterization of Cassava (Manihot
esculenta
Crantz) Collected in the Humid Forest and Guinea Savannah
Agro-ecological
Zones of Cameroon

 

Temegne Nono Carine1,4*,
Mouafor Boris Igwacho2,

Ngome Ajebesone Francis3

 

1University
of Yaoundé I, Faculty of Science, Department of Plant
Biology,
P.O. Box 812 Yaoundé, Cameroon.

2University
of Yaoundé II, Faculty of Science Economics and Management,
P.O Box 18 Soa, Cameroon.

3Institute
of Agricultural Research for Development (IRAD), P.O Box 2123 Yaoundé,
Cameroon.

4University of
Bamenda, Higher Technical Teacher Training College, Department of Civil
Engineering and Forestry Techniques, P.O. Box 39 Bambili, Cameroon.


Abstract

Background: Cassava (Manihot esculenta Crantz) is an
important crop in Cameroon where leaves and tubers are eaten. However, its
genetic variability remains unexplored in Cameroon. Local varieties are
precious genetic resources because of their diversity. Mastery of this
diversity is an important basis for crop improvement through plant breeding
programs.

Methods: Local cassava accessions
(89) were collected mainly in four regions belonging to the Humid Forest and Guinea Savannah agro-ecological
zones. These accessions have been planted with the objective to characterize
them, based on qualitative and quantitative agro-morphological traits. The
experiment was carried out in experimental station of IRAD Nkolbisson,
Cameroon.

Results: Significant differences
(p<0.05) were observed for all the 14 analysed quantitative traits.
Coefficients of variation of quantitative traits range from 11.85% (number of
leaf lobes) to 55.75% (weight of shoot). Of the 14 quantitative traits studied,
7 had high coefficients of variation (CV>20%). The remaining 7 traits
exhibit low variations. Root yields of 10 to 13 t/ha was observed with some of
the accessions. The Principal Component Analysis for quantitative traits and
Multiple Correspondence Analysis for qualitative traits revealed high dispersion
of the accessions. On the cluster analysis for qualitative traits the
accessions were classified in three groups. The dendrogram with the
quantitative traits produced three main cluster groups of the cassava
accessions evaluated.

Conclusion: This work showed the variation in
agronomic traits existing among cassava accessions in the forest and savannah
agro-ecological zones of Cameroon that could be exploited to enhance cassava
breeding programs.

Keywords: cassava accessions,
genetic diversity, agro-morphological descriptors, principal component
analysis, multiple correspondence analysis.

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