Abstract
Studies of tree-to-tree variation in fruit traits are a pre-requisite for cultivar development. Fruits were collected from each of 63 marula (Sclerocarya birrea) trees in Bushbuckridge, South Africa and from 55 trees from the North Central Region of Namibia. The South African trees were in farmers fields, communal land and natural woodland, at three sites: Acornhoek road, Allandale/Green Valley and Andover/Wits Rural Facility. The Namibian trees were all from farmers fields in three areas: North east, North west and West. The fruits were partitioned into skin and flesh/juice to examine the extent of the variation found in different components of marula fruits from different trees. Namibian fruits were significantly larger than those from South Africa (26.7 vs 20.1 g), due to their greater pulp mass (22.2 vs 16.2 g), especially the flesh/juice component. In South African fruits, those from farmers fields were significantly larger in all components (Fruit mass = 23.6 vs 19.3 and 18.0 g in natural woodland and communal land respectively). In Namibia, mean fruit mass did not differ significantly across sites (25.5 − 27.0 g). However, within each sample there was highly significant and continuous variation between trees in the pulp (S Africa = 7.5 − 31.3 g; Namibia = 8.3 − 36.0 g) and flesh/juice mass (S Africa = 2.2 − 7.6g; Namibia = 3.8 − 22. 6g), indicating the potential for selection of trees producing superior products. The fruits of the Namibian trees were compared with the fruits from one superior tree (‘Namibian Wonder) with a mean fruit mass of 69.9 g The percentage frequency distribution of fruit mass from trees in farmers fields in South Africa was skewed, while being bimodal in North east and North west populations from Namibia, suggesting that at these sites farmers are engaged in domestication through truncated selection of the best mother trees. It is concluded that there are trees in on-farm populations that have great potential to be propagated vegetatively as selected cultivars.
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References
A.R. Atangana Z. Tchoundjeu J.-M. Fondoun E. Asaah M. Ndoumbe R.R.B. Leakey (2001) ArticleTitleDomestication ofIrvingia gabonensis: 1 Phenotypic variation in fruit and kernels in two populations from Cameroon Agroforestry Systems 53 55–64 Occurrence Handle10.1023/A:1012293700774
A. Botelle P. du Plessis K. Pate R. Laamanen (2002) A survey of Marula fruit yields in north-central Namibia, Report to UK DFID Forestry Research Programme (Project No R7795) CRIAA-SA-DC Windhoek,Namibia 26
L.C. Holtzhausen E. Swart R. Rensburg Particlevan (1990) ArticleTitlePropagation of the marula (Sclerocarya birrea subsp. caffra) Acta Horticulturae 275 323–334
R.R.B Leakey (1999) ArticleTitlePotential for novel food products from agroforestry trees: A review Food Chemistry 66 IssueID(1 1–14 Occurrence Handle1:CAS:528:DyaK1MXislGqtb4%3D
R.R.B. Leakey (2005c) ArticleTitleDomestication potential of Marula (Sclero- carya birrea subsp caffra) in South Africa and Namibia: 3.Multi-trait selection AgroforestrySystems 64 51–59
R.R.B. Leakey A.J. Simons (1998) ArticleTitleThe domestication and commercialisation of indigenous trees in agroforestry for the alleviation of poverty Agroforestry Systems 38 165–176
Leakey R.R.B., Temu A.B., Melnyk M. and Vantomme P. (eds), 1996. Domestication and Commercialization of Non-timber Forest Products in Agroforestry Systems. FAO Non-Wood Forest Products 9: 8-22.
R.R.B. Leakey J.-M. Fondoun A. Atangana Z. Tchoundjeu (2000) ArticleTitleQuantitative descriptors for variation in the fruit and seeds of Irvingia gabonensis Agroforestry Systems 50 47–58 Occurrence Handle10.1023/A:1006434902691
R.R.B. Leakey A.R. Atangana E. Kengni A.N. Waruhiu C. Usoro Z. Tchoundjeu P.O. Anegbeh (2002) ArticleTitleDomestication of Dacryodes edulis in West and Central Africa: characterization of genetic variation Forest, Trees and Livelihoods 12 57–71
R.R.B. Leakey Z Tchoundjeu R.I. Smith R.C. Munro J.-M. Fondoun J. Kengue P.O. Anegbeh A.R. Atangana A.N. Waruhiu E. Asaah C. Usoro V. Ukafor (2004a) ArticleTitleEvidence that subsistence farmers have domesticated indigenous fruits (Dacryodes edulis and Irvingia gabonensis) in Cameroon and Nigeria Agroforestry Systems 60 101–111 Occurrence Handle10.1023/B:AGFO.0000013259.95628.22
R.R.B. Leakey K. Pate C. Lombard (2005b) ArticleTitleDomestication potential of marula (Sclerocarya birrea subsp caffra) in South Africa and Namibia: 2. Phenotypic variation in nut and kernel traits Agroforestry Systems 64 37–49
J.A. Maghembe Y. Ntupanyama P.W. Chirwa (1995) Improvement of indigenous fruit trees of Miombo woodlands of southern Africa ICRAF Nairobi, Kenya 138
J.A. Maghembe A.J. Simons F. Kwesiga M. Rarieya (1998) Selecting indigenous trees for domestication in southern Africa: priority setting with farmers in Malawi, Tanzania, Zambia and Zimbabwe ICRAF Nairobi, Kenya 94
M. Mander J. Cribbins F. Lewis (2002) The commercial marula industry: a sub-sector analysis.Report to UK DFID Forestry Research Programme (Project No R7795). Institute of Natural Resources Scottsville, South Africa 79
Mizrahi Y.and Nerd A. 1996. New crops as a possible solution for the troubled Israeli export market.. In: Janick J. and Simon J.E. (eds), Progress in new crops: Proceedings of the third national new crops symposium, 46-64. American Society for Horticultural Science.
A. Nerd Y. Mizrahi (1993) Domestication and introduction of marula (Sclerocarya birrea subsp. caffra) as a new crop for the Negev desert of Israel J. Janick J.E. Simon (Eds) New Crops Wiley New York ,USA 496–499
V. Pretorius E. Rohwer A. Rapp L.C. Holtzhausen H. Mandery (1985) ArticleTitleVolatile flavour components of marula juice Z. Lebensm. Unter.-Forsch. 181 458–461 Occurrence Handle1:CAS:528:DyaL28Xoslegsw%3D%3D
G. Schaefer A.E.G. McGill (1986) ArticleTitleFlavour profiling of juice of the marula (Sclerocarya birrea subsp. caffra) as an index for cultivar selection Acta Horticulturae 194 215–222
S.E. Shackleton (2002) The informal marula beer traders of Bushbuckridge, Limpopo Province, South Africa, Report to UK DFID Forestry Research Programme (Project No R7795) Rhodes University Grahamstown,south Africa 25
S.E. Shackleton C.M. Shackleton A.B. Cunningham C. Lombard C.A. Sullivan T.R. Netshiluvhi (2002a) ArticleTitleKnowledge on Sclerocarya birrea subsp. caffra with emphasis on its importance as a non-timber forest product in South and southern Africa: A summary, Part 1: Taxonomy, ecology and role in rural livelihoods Southern African Forestry Journal 194 27–41
C.M. Shackleton J. Botha P.L. Emanuel S. Ndlovu (2002b) Inventory of marula (Sclerocarya birrea subsp. caffra) stocks and fruit yields in communal and protected areas of the Bushbuck- ridge lowveld, Limpopo Province, South Africa. Report to UK DFID Forestry Research Programme (Project No R7795). Rhodes University Grahamstown, South Africa 17
C.A. Sullivan D.P. O’Regan S. Shackleton S. Ousman C. Shackle- ton M. Mander R. Wynberg S. den Adel R.R.B Leakey A.B. Cunningham A. Botelle A. Combrinck V. Datadin J. Forte D. Hammond S. Laird C. Lombard T. Martinborough T. McHardy J. Muller T. Netshiluvhi K. Payne P. du Plessis U. Poulsen V. Radzik J. Botha J. Cribbins P. Emmanuel J. Grimmond I. Joseph R. Laamanen F. Lewis S. Ndlovu K. Pate J. Strong R. Thomas (2003) Winners and Losers in Forest Product Commercialisation, Final Report to DFID Forestry Research Programme (R7795) Centre for Ecology and Hydrology Wallingford,UK,CD
Taylor. F.W., Mateke S.M.and Butterworth K.J. 1996. A holistic approach to the domestication and commercialisation of non-timber forest products. In: Leakey R.R.B., Temu A.B., Melnyk M.and Vantomme P. (eds), Domestication and Commercialization of Non-timber Forest Products in Agroforestry systems. FAO Non-Wood Forest Products 9: 8-22.
M.K. Thiong’o S. Kingori H. Jaenicke (2002) ArticleTitleThe taste of the wild: Variation in the nutritional quality of marula fruits and opportunities for domestication Acta Horticulturae 575 237–244
von Teichmann I. 1982. Notes on the distribution, morphology, importance and uses of the indigenous Anacardiaceae: 1. The distribution and morphology of Sclerocarya birrea (the Marula). Trees in South Africa:October-December, 2-7.
von Teichmann I. 1983. Notes on the distribution, morphology, importance and uses of the indigenous Anacardiaceae: 2. The importance and uses of Sclerocarya birrea (the Marula). Trees in South Africa: April - September, 35-41.
Waruhiu A.N. 1999. Characterization of fruit traits toward domestication of an indigenous fruit tree of West and Central Africa: a case study of Dacryodes edulis in Cameroon. M.Sc. thesis, University of Edinburgh, 58 pp.
R. Wynberg J. Cribbins R.R.B. Leakey C. Lombard M. Mander S.E. Shackleton C.A. Sullivan (2002) ArticleTitleA summary of knowledge on marula (Sclerocarya birrea subsp. caffra) with emphasis on its importance as a non-timber forest product in South and southern Africa. 2. Commercial use, tenure and policy, domestication, intellectual property rights and benefit-sharing Southern African Forestry Journal 196 67–77
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Leakey, R., Shackleton, S. & Plessis, P.d. Domestication potential of Marula (Sclerocarya birrea subsp caffra)in South Africa and Namibia: 1. Phenotypic variation in fruit traits. Agroforest Syst 64, 25–35 (2005). https://doi.org/10.1007/s10457-005-2419-z
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DOI: https://doi.org/10.1007/s10457-005-2419-z