Relationship between environmental factors, tapping dates, tapping intensity and gum arabic yield of an Acacia senegal plantation in western Sudan

Ballal, M. E.; Siddig, E. A. El; Elfadl, Mohamed; Luukkanen, Olavi

doi:10.1016/j.jaridenv.2005.01.024

Cited by 35 publications

(25 citation statements)

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“…Ramly (2012) emphasised the benefits of improving the technical know-how in the treatments and activities associated with gum production even if collectors generally learn the above-mentioned good practices through contact with other collectors. Finally, environmental factors are important in the production of gum arabic: Wekesa et al (2010) and Ballal et al (2005) found that rocky soils, high soil temperatures and high rainfall lead to better yields.…”

Section: Quality Aspects and Gum Arabic Qualitymentioning

confidence: 99%

3. Quality challenges and opportunities in the pineapple supply chain in Benin

Arinloye¹,

Boekel²

2016

Quality and Innovation in Food Chains

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Section: Quality Aspects and Gum Arabic Qualitymentioning

confidence: 99%

3. Quality challenges and opportunities in the pineapple supply chain in Benin

Arinloye¹,

Boekel²

2016

Quality and Innovation in Food Chains

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“…Cet ensemble de données confirme l'existence d'une grande variabilité de cette caractéristique au Burkina Faso, situation qui semble également exister dans les populations d'autres pays (Ballal et al, 2005 ;Raddad et Luukkanen, 2006). Le calcul de ces coefficients de variation dans l'essai de provenances de Djomga (tableau V) donne des chiffres variant entre 38 % et 112 % pour les quatre populations provenant du Sénégal, mais ces données doivent être interprétées avec précaution étant donné le faible nombre d'arbres par provenance pris en compte.…”

Section: Variabilité Intra-peuplementunclassified

“…Au Burkina Faso, les données fournies par Zerbo (2005), étudiant la production de gomme dans quatre peuplements naturels, permettent d'estimer le coefficient de variation inter-peuplements à environ 25 %. Au Soudan, les estimations varient de 25 à 44 % (Ballal et al, 2005 ;Raddad, Luukkanen, 2006).…”

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Acacia senegal au Burkina Faso : stratégie d'amélioration génétique

Jacques¹,

Zerbo²,

Soloviev³

et al. 2010

Bois for. trop.

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Acacia senegal au Burkina Faso : stratégie d'amélioration génétique B O I S E T F O R Ê T S D E S T R O P I Q U E S , 2 0 1 0 , N° 3 0 4 ( 2 ) 35 A M É L I ORATI ON GÉ N É TI Q U E / LE P OIN T SUR… RÉSUMÉ ACACIA SENEGAL AU BURKINA FASO : STRATÉGIE D'AMÉLIORATION GÉNÉTIQUEDepuis près de dix ans, le Centre national de semences forestières développe un programme d'amélioration génétique d'Acacia senegal en vue d'accroître la production de gomme arabique au Burkina Faso. Différentes mesures pratiquées dans huit peuplements naturels ainsi que dans trois tests de provenances suivis pendant un à trois ans ont permis d'évaluer diffé-rents paramètres génétiques. Les résultats obtenus montrent une grande variabilité de la production au sein des provenances, qui se traduit par une héritabilité génoty-pique significative. La variabilité au niveau individuel apparaît encore plus élevée, la production des arbres les plus performants atteignant plus d'un kilo de gomme par an. Un effet « année » sur la production est également observé. Sur la base de ces résultats, les gains potentiels par sélection génétique sont estimés à partir de différents scénarios en prenant en compte la sélection au niveau des populations ainsi qu'au niveau individuel. La sélection individuelle semble être la plus efficace même si un gain significatif est aussi attendu par la sélection de peuplements à graines. Les dispositifs existants et en cours d'installation devraient permettre de poursuivre ce travail d'amélio-ration génétique aboutissant à la création de variétés améliorées. Enfin, le bon comportement de plusieurs provenances étrangères permet également d'entrevoir la possibilité d'élaborer un programme d'amélioration génétique à l'échelle ré-gionale, couvrant une grande partie de l'Afrique sahélienne. Mots-clés :Acacia senegal, amélioration génétique, gain génétique, héritabilité, gomme, Burkina Faso. ABSTRACT ACACIA SENEGAL IN BURKINA FASO: A GENETIC IMPROVEMENT STRATEGYFor almost ten years, The National Forest Seeds Centre has been developing a genetic improvement programme for Acacia senegal with a view to increasing Burkina Faso's gum arabic production. Different measurements in 8 natural stands and 3 provenance trials monitored over one to three years were used to assess various genetic parameters. The results show wide variability in production by provenance, reflected in significant genotype heritability. Individual variability is even higher, with the best trees producing over 1 kilogram of gum per year. A "year" effect on production was also observed. Based on these results, potential gains through genetic selection were estimated for different selection scenarios both at population and individual scale. Individual selection seems to be the most effective, but significant gains are also expected from selection of seed-tree populations. Work on genetic improvement to create improved varieties will continue through trials already under way or now becoming established. Finally, the promising behaviour of several foreign provenances sugges...

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“…is a multipurpose agro-forestry tree, native to the arid and semi-arid lands of Sub-Saharan Africa but found as far as the Indian sub-continent. It grows to a height of 5-12 m, with a trunk up to 30 cm in diameter (Fagg & Allison 2004) and is valued for gum arabic production, as well as secondary agricultural roles, such as restoring soil fertility and providing fuel and fodder (Ballal et al 2005). It is also essential in sand dune fixation and is preferred in bush-fallow rotation and intercropping Despite its ecological and economic importance, little progress has been made in developing sets of molecular markers for genetic studies.…”

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Cross-amplification and Characterization of Polymorphic Microsatellite Markers From Acacia (Senegalia) mellifera and Acacia brevispica to Acacia senegal (L.) Willd.

et al. 2010

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The NERC and CEH trade marks and logos ('the Trademarks') are registered trademarks of NERC in the UK and other countries, and may not be used without the prior written consent of the Trademark owner.Cross-amplification and characterization of polymorphic microsatellite markers from Acacia (Senegalia) mellifera and Acacia brevispica to Acacia senegal (L.) Willd. to 0.800 (Ame03). Cross amplification of these loci represents a potential source of codominant marker and will be useful in the study of genetic diversity, structure, gene flow and breeding systems of this important Acacia species. IntroductionAcacia senegal (L) Willd. is a multipurpose agro-forestry tree, native to the arid and semi-arid lands of Sub-Saharan Africa but found as far as the Indian sub-continent. It grows to a height of 5-12 m, with a trunk up to 30 cm in diameter (Fagg & Allison 2004) and is valued for gum arabic production, as well as secondary agricultural roles, such as restoring soil fertility and providing fuel and fodder (Ballal et al. 2005). It is also essential in sand dune fixation and is preferred in bush-fallow rotation and intercropping Despite its ecological and economic importance, little progress has been made in developing sets of molecular markers for genetic studies.Microsatellites are among the best classes of markers for studying genetic processes in natural populations because they are abundant, co-dominant, interspersed throughout the genome, possess high resolution power and polymorphism (Chase et al. 1996). Their development, however, requires a significant investment (Fernandez et al. 2000); therefore, when markers have been developed in taxonomically related species, it is worthwhile testing for cross-amplification. In this brief preliminary study thirty-four microsatellite primers developed from A. mellifera and A. brevispica were tested for cross-amplification in A. senegal. Materials and Methods Microsatellite loci screeningGenomic DNA was isolated from leaves following a modified CTAB procedure . These loci were then tested for polymorphism and reproducibility. Polymorphism testingThe final set of loci was screened for polymorphism using a set of 30 DNA samples (3 samples per population from 10 populations). PCR was carried out as described above and products separated on 0.25 mm denaturing polyacrylamide gels containing 10%Ammonium Persulfate (APS), tetramethylethylenediamine (TEMED)-Omnipur and 8 % acrylamide (Gene-PAGE plus)-Amresco and electrophoresed using 1 X TBE buffer on a Li-Cor IR 2 4200 DNA sequencer. Band sizes were determined by referencing standard IRD800, 50-350 bp and 50-700 bp ladder (Khasa et al. 2005). Loci that were polymorphic and informative were then selected as a set of A. senegal markers for further studies. ResultsOut of the 34 loci screened, 11 were selected for polymorphism screening with a larger number of DNA samples while others failed to amplify or showed poor amplification (Table S1). During the screening, 7 loci (Table 1) showed positive amplification and unambiguous pattern...

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Relationship between environmental factors, tapping dates, tapping intensity and gum arabic yield of an Acacia senegal plantation in western Sudan

Cited by 35 publications

References 1 publication

3. Quality challenges and opportunities in the pineapple supply chain in Benin

3. Quality challenges and opportunities in the pineapple supply chain in Benin

Acacia senegal au Burkina Faso : stratégie d'amélioration génétique

Cross-amplification and Characterization of Polymorphic Microsatellite Markers From Acacia (Senegalia) mellifera and Acacia brevispica to Acacia senegal (L.) Willd.

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