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Accueil | Français » Publications » Articles scientifiques » Genetic diversity of Jatropha curcas L. in Senegal compared with exotic (...)

Genetic diversity of Jatropha curcas L. in Senegal compared with exotic accessions based on microsatellite markers

2014. Bassiaka Ouattara • Khadidiatou Ndoye Ndir • Mame Codou Gueye •
Ibrahima Die´dhiou • Adeline Barnaud • Daniel Fonceka • Ndiaga Cisse´ •
Elie Léonard Akpo • Diégane Diouf

Abstract  : Significant efforts have been undertaken in
West Africa to increase biofuel production with the
expectation to alleviate the dependency on fossil
energies and to reduce rural poverty by diversifying
cultivated crops. In this context, Jatropha curcas L., a
shrub belonging to Euphorbiaceae family, has gained
great interest because of its oil which can be converted
to biodiesel. It is also highly adaptable to marginal soils
due to its drought-tolerant characteristics. Characterisation
of J. curcas germplasm in Senegal could be an important input for its better management and in
identifying genotypes that could be used in breeding
program. Genetic diversity of 103 accessions including
82 accessions from different agro ecological zones in
Senegal and 21 exotic accessions was assessed through
33 microsatellite markers. All the markers gave
amplifications at the expected band size. Only one
microsatellite marker, JCT17, was polymorphic showing
3 alleles and allows distinguishing 2 accessions
from Burkina Faso. The surprisingly low level of
genetic variation might be because introduction of J.
curcas in Senegal seems to have been done from one or
a few origins and the species has not regained genetic
diversity since then due to vegetative propagation.
Cultivation of J. curcas at large scale may face to
vulnerability to pests and require many cautions. They
are necessity to widen the genetic base of J. curcas in
Senegal via new introductions from its centre of origin.

Keywords : Genetic diversity - Jatropha curcas -
Microsatellite marker - Senegal