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CBN-V Video
Archives - S6-25
Diversity Analysis of African Landraces of Cassava as Assessed with
Agrobotanical Traits and Molecular Markers
Raji A.A.1,2,
A.G.O. Dixon1, I. Fawole2 and M. Gedil1
1. International Institute of Tropical Agriculture, Ibadan, Nigeria
A.Raji@cgiar.org
2. Department of Crop Protection and Environmental Biology,
University of Ibadan, Ibadan, Nigeria
The genetic relationships among 500 African landraces collected from
different parts of the continent were assessed by both agrobotanical
traits and molecular markers. Based on cluster analysis of the
agrobotanical traits, the landrace population was differentiated
into 12 groups. Cluster analysis of the AFLP and RAPD data provided
similar genetic relationships of the population. The AFLP technique,
however, detected a much higher level of polymorphism and
subsequently a better result of the diversity structure of the 12
cluster groups than the RAPD analysis. Two hundred AFLPs obtained
from 20 primer combinations were able to discriminate between
certain genotypes, which could not be distinguished using 65 RAPDs.
The level of variation detected within the cassava landrace
population indicated that an expanded germplasm collection might be
necessary to ensure a broader representation of the African
cultivars.
2007©
Donald Danforth Plant Science Center All rights reserved.
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