Vegetable oils are increasingly valued for their nutritional and industrial applications, which has driven interest in underutilised tree oil crops such as Allanblackia parviflora. This study aimed to evaluate the relative influence of tree morphology, location, and ecological zone on the oil stability properties and fatty acid composition of A. parviflora seed and kernel oils in Ghana, with implications for domestication and breeding. Oils were extracted from kernel (dehulled seed) and whole seed samples obtained from 157 trees across 16 communities spanning three ecological zones. Free fatty acid content and peroxide values were determined, and their relationships with tree morphological traits, oil yield, soil properties, community, and ecological zone were assessed. Free fatty acid values ranged from 0.12% - 0.50% (mean 0.37%) for kernel oils and 0.12% - 0.69% (mean 0.53%) for seed oils, while peroxide values ranged from 1.59 - 4.00 meq/kg (mean 2.11 meq/kg) and 2.00 - 6.00 meq/kg (mean 3.84 meq/kg), respectively. Although substantial tree-to-tree variation was observed, oil stability indices were not significantly influenced by tree morphology, soil properties, community, or ecological zone. These findings indicate that A. parviflora oil quality is relatively stable across ecological and morphological gradients, suggesting that individual tree selection rather than site-specific factors may be more critical for breeding and domestication programmes. The results provide a scientific basis for selecting superior trees to enhance the commercialisation and sustainable development of A. parviflora as a high-value indigenous oil crop.
Cite this paper
Sefah, W. , Boyce, M. C. , Horwitz, P. , Sefah, L. and Ayim, I. (2026). The Relative Influence of Location and Tree Morphology on Allanblackia parviflora Oil Stability Properties. Open Access Library Journal, 13, e11082. doi: http://dx.doi.org/10.4236/oalib.1111082.
Nyam, K.L., Tan, C.P., Lai, O.M., Long, K. and Che Man, Y.B. (2009) Physicochemical Properties and Bioactive Compounds of Selected Seed Oils. LWT—Food Science and Technology, 42, 1396-1403. https://doi.org/10.1016/j.lwt.2009.03.006
Imed, E., and Arbi, N. (2011) Characteristics and Composition of Washingtonia Filifera (Linden ex André) H. Wendl. Seed and Seed Oil. Food Chemistry, 126, 197-202. https://doi.org/10.1016/j.foodchem.2010.10.099
Cerchiara, T., Chidichimo, G., Ragusa, M.I., Belsito, E.L., Liguori, A. and Arioli, A. (2010) Char-acterization and Utilization of Spanish Broom (Spartium junceum L.) Seed Oil. Industrial Crops and Products, 31, 423-426. https://doi.org/10.1016/j.indcrop.2009.11.003
Pengou, M., Noumi, G.B. and Ngameni, E. (2012) Fatty Acid Composition and Some Physicochemical Properties of Oils from Allanblackia gabonensis and A.stanerana Kernels. Jour-nal of the American Oil Chemists’Society, 90, 27-32. https://doi.org/10.1007/s11746-012-2130-y
Noumi, G.B., Njine, C.B., Pengou, M.S., and Ngameni, E. (2011) Physicochemical Analysis of the Came-roonian Allanblackia floribunda Oliver Seed Oil Extract. Rivista Italiana delle Sostanze Grasse, 88, 38-45.
Wilfred, S., Pierre, H., Mary, C.B. and Lydia, S. (2019) Oil Yields for Allanblackia Parviflora (Tallow Tree) in Ghana: The Effects of Oil Extraction Methods, Tree Morphology and Environmental Characteristics. African Journal of Food Science, 13, 163-181. https://doi.org/10.5897/ajfs2019.1829
EFSA (2007) Opinion of the Scientific Panel on Dietetic Products, Nutrition and Allergies on a Request from the Commission Related to the Safety of Allanblackia Seed Oil for Use in Yellow Fat and Cream Based Spreads. EFSA Journal, 5, Article 580. https://doi.org/10.2903/j.efsa.2007.580
Alenyorege, E.A., Ayim, I. and Aheto, J.H. (2017) Uniqueness of Allanblackia Seed Oil: Prospects and Potential in Ghana. African Journal of Food, Integrated Agriculture, 1, 22-29.
Asaah, E., Tchoundjeu, Z., Ngahane, W., Tsobeng, A., Kouodiekong, L., Jamnadass, R., et al. (2011) Allanblackia floribunda: A New Oil Tree Crop for Africa: Amenability to Grafting. New Forests, 41, 389-398. https://doi.org/10.1007/s11056-010-9230-z
Atangana, A.R., van der Vlis, E., Khasa, D.P., van Houten, D., Beaulieu, J. and Hendrickx, H. (2011) Tree-to-Tree Variation in Stearic and Oleic Acid Content in Seed Fat from Al-lanblackia floribunda from Wild Stands: Potential for Tree Breeding. Food Chemistry, 126, 1579-1585. https://doi.org/10.1016/j.foodchem.2010.12.023
Kuete, V., Azebaze, A.G.B., Mbaveng, A., Nguemfo, E.L., Tshikalange, E.T., Chalard, P., et al. (2011) Anti-oxidant, Antitumor and Antimicrobial Activities of the Crude Extract and Com-pounds of the Root Bark of Allanblackia floribunda. Pharmaceutical Biology, 49, 57-65. https://doi.org/10.3109/13880209.2010.494673
Ymele, E.V., Dongmo, A.B. and Dimo, T. (2011) Analgesic and Anti-Inflammatory Effect of Aqueous Extract of the Stem Bark of Allanblackia gabonensis (Guttiferae). In-flammopharmacology, 21, 21-30. https://doi.org/10.1007/s10787-011-0096-2
Ofori, D.A., Peprah, T., Lienneh, S., and Bosompem, S.A. (2008) Allanblackia Do-mestication Project: Report on Training Workshop on Vegetative Propagation of Allanblackia parvi-flora. CSIR-Forestry Research Institute of Ghana.
Guerfel, M., Ouni, Y., Taamalli, A., Boujnah, D., Stefanoudaki, E. and Zarrouk, M. (2009) Effect of Location on Virgin Olive Oils of the Two Main Tunisian Olive Cultivars. European Journal of Lipid Science and Technolo-gy, 111, 926-932. https://doi.org/10.1002/ejlt.200800108
Sefah, W., Adubofour, J. and Oldham, J.H. (2010) Optimum Conditions for Expression of Oil from Allanblackia floribunda Seeds and As-sessing the Quality and Stability of Pressed and Solvent-Extracted Oil. African Journal of Food Science, 4, 563-570.
Aremu, M.O., Ibrahim, H. and Bam-idele, T.O. (2015) Physicochemical Characteristics of the Oils Extracted from Some Nigerian Plant Foods—A Review. Chemical Process Engineering Research, 32, 36-51.
Arslan, D., Karabekir, Y. and Schreiner, M. (2013) Variations of Phenolic Compounds, Fatty Acids and Some Qualitative Characteristics of Sarıulak Olive Oil as Induced by Growing Area. Food Research International, 54, 1897-1906. https://doi.org/10.1016/j.foodres.2013.06.016
Allal, F., Piombo, G., Kelly, B.A., Okullo, J.B.L., Thiam, M., Diallo, O.B., et al. (2013) Fatty Acid and Tocopherol Patterns of Variation within the Natural Range of the Shea Tree (Vitellaria paradoxa). Agroforestry Systems, 87, 1065-1082. https://doi.org/10.1007/s10457-013-9621-1
Mihiri, M., and Jagath, W. (2015) Study on Variation in Seed Morphology, Oil Content and Fatty Acid Pro-file of Madhuca Longifolia Grown in Different Agro-Climatic Zones in Sri Lanka. Science Research, 3, 105-109. https://doi.org/10.11648/j.sr.20150303.20
