Analysing fruit shape in safou (Dacryodes edulis) fruit by using aspect ratio

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Research Paper 01/06/2013
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Analysing fruit shape in safou (Dacryodes edulis) fruit by using aspect ratio

Alain Serges Ondo-Azi, Crépin Ella Missang, Pamphile Nguema N, Thomas Silou
Int. J. Agron. Agri. Res.3( 6), 7-12, June 2013.
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Fruit shape is one of the most important quality criteria for evaluation by customer preference. Aspect ratio (A.R.) was used as physical parameter to perform the choice of ratios for fruits shape determination. This study proposes a relationship between fruit shape and morphological parameters in bush butter fruits (Dacryodes edulis) collected on 35 bush butter trees. The results show that bush butter fruits present some shapes. To describe fruit shapes the use of morphological characteristics is possible. So, the unique parameter used in our study was A.R., width over length. All of 35 trees analyzed were regrouped in three types; those types were assimilated at shapes in bush butter fruit designated by elliptical, spheroidal and obovate shape. On fruit shapes, the analysis of variance shows that the mean values of aspect ratio are significantly different shape as shape. So, it indicates great distinction in the three fruit shapes presented. The distance calculus proposes also a bush butter categorization model based on A.R. A model to describe fruits source of the new trees is proposed.


Anegbeh PO, Ukafor V, Usoro C, Tchoundjeu Z, Leakey RRB, Schreckenberg K. 2004. Domestication of Dacryodes edulis: 1. Phenotypic variation of fruit traits from 100 trees in southeast Nigeria. New Forests 29,149-160.

Chaim BA, Borowsky Y, Rao GU, Tanyolac B, and Paran I. 2003. fs3.1: a major fruit shape QTL conserved in Capsium. Genome 46, 1-9.

Ekeke BA, Oyebade BA, Adesina M. 2006. Germination and seedling growth as influence by seed of Dacryodes edulis (G.Don) H.J. Lam in Nigeria. European Journal of Scientific Research 15 (3), 336-343.

Heijden GW, van der Vossepoel AM. 1994. On defining length and width for botanical object discrimination. Aspects of visual form processing, 562-573.

Jha SN, Kingsly ARP, Sangeeta Chopra. 2006. Physical and mechanical proprieties of mango during growth and storage for determination of maturity. Journal of Food Engineering 72, 73-76.

Kama-Niamayoua R. 2006. Valorisation alimentaire du safou (Dacryodes edulis). Quantification et caractérisation de la matière première, évaluation des potentialités technologiques en vue de la production d’huile. PhD Thesis, Université Marien Ngouabi, Congo.

Kapseu C, Mapongmetsem PM, Silou T, Roques M. 1998. Physicochimique du fruit du bush buttertier (Dacryodes edulis) camerounais. Tropicultura 16-17, 37-42.

Kengue J. 1990. Le bush buttertier (Dacryodes edulis (G.Don) H.J. Lam). Premières données sur la morpholgie et la biologie d’une Burseraceae fruitière et oléifère d’origine africaine. PhD thesis. Université de Yaoundé, Cameroun, 62-68.

Ladipo DO, Adewusi HG, Omaliko CPE, Sarumi MB, Adebisi AA, Gbadamosi LM, Okeke AI, Asiegbu JE. 2002. Dacryodes edulis germplasm collection from southern Nigeria. p. 93. In 3e séminaire international sur la valorisation du safoutier et autres oléagineux non conventionnels, Cameroun. 3–5 Octobre 2000. Presses universitaires d’Afrique, Yaoundé, Cameroun.

Laroussilhe (De) F, Schwob R, Wolf JP. 1964. Le bush butter, source de matières grasses. Présentation au Premier Congrès International des Industries Agricoles et alimentaires des zones Tropicales et Subtropicales. 14-19 December, Abidjan.

Massamba P, Kama-Niamayou R, Mampouya D, Silou T. 2006. Evolution de la production et caractérisation des fruits au cours de sept premières années d’un verger de marcottes des safoutiers (Dacryodes edulis (G. Don) H.J. Lam) à Boko, au Congo Brazzaville. Annales de l’Université Marien NGOUABI 7, 12-25.

Nunome T, Ishiguro K, Yoshida T, Hirai M. 2001. Mapping of fruit shape and color development traits in eggplant (Solanum melongena L.) based on RAPD and AFLP markers. Breeding Science 51, 19-26.

Okafor JC.1983. Varietal delimitation in Dacryodes edulis (G. Don) H.J. LAM (Burseraceae). International Tree Crops Journal 2, 255-265.

Omoti U, Okiy DA. 1987. Characteristics and composition of the pulp oil and cake of the African pear, Dacryodes edulis (G.Don) H.J. Lam. Journal of the Science of Food and Agriculture 38, 67-72.

Ondo-Azi AS, Ella Missang C, Silou T. 2009. Classification of Dacryodes edulis (G.Don) H.J. Lam by using morphological and physical characteristics of the fruits: a statistical approach. Forests, Trees and Livelihoods 19, 99-109.

Silou T, Rocquelin G, Gallon G, Molagui T. 2000. Contribution à la caractérisation des bush butters (Dacryodes edulis) d’Afrique Centrale. Note II- Composition chimique et caractéristiques nutritionnelles des bush butters du district de Boko (Congo-Brazzaville). Variation inter-arbre. Rivista Italiana delle Sostanze Grasse 77, 85-89.

Silou T, Rocquelin G, Mouaragagja I, Gallon G. 2002. Chemical composition and nutritional characteristics of bush butter (Dacyodes edulis) of Cameroon and the Congo-Brazzaville, the Congo-Kinshasa and Gabon. Rivista Italiana delle sostanze Grasse 79, 177-182.

Thibeault B, Watkins R, Smith RA. 1983. Descriptor list for pear. International Board for Plant Genetic Resources. IBPGR/82/57.

Youmbi E, Mbeuyo M, Tchinda ND, Amougou A. 2010. Physico-chemical characterization and classification of fruits of Dacryodes edulis from the major agro-ecological zones of Cameroon. Fruits 66(6), 355-365.