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Zerbo G.C.,Center National Of Semences Forestieres Cnsf | Soloviev P.,Association Pour la Promotion de lEducation et de la Formation A lEtranger | Jacques D.,Direction Generale Agriculture | Lompo D.,Center National Of Semences Forestieres Cnsf | And 2 more authors.
Bois et Forets des Tropiques | Year: 2012

In 2002, the National Tree Seeds Centre launched an improvement programme for Acacia senegal in Burkina Faso, and is now considering possibilities for distributing plant material from high-quality grafted gum trees. The research conducted to date has focused on grafting techniques and on the best time of year for grafting to take place. Of the 4 techniques tested, the success rate for chipbudding was very low at around 9 %, while the other 3, terminal cleft grafting, side grafting and whip grafting, produced success rates of 40 % to 53 %. Regarding the most suitable times of year, no significant variations in success rates for terminal cleft grafting were observed between December and March, the two periods tested. This technique, used to produce stock grafted with plant material from productive adult gum trees, could become an additional method to the plant production system based on population selection and seed tree orchards. However, further data are needed on the medium-term behaviour of the grafted stock before promoting the establishment of gum plantations of this type on a large scale. Source


Thiombiano D.N.E.,University of Ouagadougou | Lamien N.,Institute Of Lenvironnement Et Of Recherches Agricoles Inera | Dibong D.S.,University of Douala | Boussim I.J.,University of Ouagadougou | Belem B.,Center National Of Semences Forestieres Cnsf
Science et Changements Planetaires - Secheresse | Year: 2012

In Burkina Faso, rural households experience a food shortage period occuring early in the rainy season and lasting until the next crop harvest period. During this period, farmers rely on edible fruits or leafy plant species for their daily food needs. To contribute to farmers' food security, the identification and cultivation of these plants is a necessity. The present study took place in the Sudano-Sahelian zone. Its overall objective was to contribute to farmers' food security. Its specific objectives were : i) to identify the edible fruits and leafy tree species in two localities during the food shortage period ; ii) to identify priority species that are used during this period ; and iii) to determine the forms of their valorization. Data were collected using a semistructured questionnaire supplemented by interviews with key informants and exercises dealing with the classification of preferential species. Results show that the most commonly used strategy during the food shortage period is the consumption of fruits, leaves and flowers harvested from local woody species. In total, 9 species were cited by informants at Pobé-Mengao and 13 species at Nobéré. Boscia senegalensis, Balanites aegyptiaca and Leptadenia hastata are priority species at Pobé-Mengao while Vitellaria paradoxa, Parkia biglobosa and Lannea microcarpa are priority species at Nobéré. In the context of climate change, there is an urgent need to conserve and domesticate these species. Source


Sacande M.,Royal Botanic Gardens | Sina S.,Center National Of Semences Forestieres Cnsf | Oubida R.W.,Center National Of Semences Forestieres Cnsf
Seed Science and Technology | Year: 2010

Seeds of Parkia biglobosa, stored for < 1 to up to 20 years at 4°C at the Centre National de Semences Forestieres, Burkina Faso, were assessed for their viability as affected by previous handling conditions. Germination was assessed in sand at ambient temperatures of ca. 25°C, following pre-treatment in sulphuric acid (H2SO4, 98%). A ten minute acid scarification treatment, the recommended pre-treatment for fresh seeds, was also optimum for germinating stored seeds, independently of their storage durations. From the different accessions studied, there was strong evidence that the rapidly reduced viability of seeds was mainly due to a failure to initially reduce moisture content (MC) to a level safe for storage, and maintain it at that MC during storage. The observed elevations of seed MC during storage at 4°C in the seedbank were partially explained by inappropriate handling during regular sub-sample withdrawals of seeds, allowing water uptake through re-equilibration with high relative humidities. Subsequently, the viability of those seeds decreased rapidly. For one seed lot for which MC was maintained at 5.6% during 11 years of storage, germination was 95%. The recommended seed MC of ca. 5% for long term storage corresponded to a water sorption level of about 10% RH for P. biglobosa. Better monitoring and handling procedures for conserving seeds are needed in order to improve their longevity during storage. Source


Soloviev P.,Center National Of Semences Forestieres Cnsf | Jacques D.,Direction Generale Agriculture | Zerbo G.C.,Center National Of Semences Forestieres Cnsf | Lompo D.,Center National Of Semences Forestieres Cnsf
Bois et Forets des Tropiques | Year: 2010

The main economic value of Acacia senegal lies in its capacity for producing gum arabic. In Burkina Faso, the decline of natural stands of A. senegal and the low gum arabic productivity in some cases have prompted the development of a genetic improvement programme. Its main objective is to produce reproductive plant material capable of creating productive gum plantations. The two improvement methods chosen are selection of seed-tree stands and the creation of seed orchards of "plus trees". The methodology involved studies of the average gum arabic production of trees in 8 natural stands, 12 plantations and 3 trials using local and foreign provenances, taking criteria into account for gum quality, tree health and production of woody material. The results showed, in particular, wide variability in the "average gum production" criterion, both between and within stands. Our studies led to the selection of three stands supplying reproductive forest material classified as "selection" material according to OECD criteria, and to the establishment of a seed orchard of "plus trees" to supply reproductive forest material in the medium term complying with the "qualified" category. The results obtained open up prospects for trade in improved seeds and development of a genetic improvement programme at sub-regional level. Source

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