This study examines the growth and stem straightness variation between teak (Tectona grandis L. f.) provenances in a 30-year-old field trial in the coastal lowland of Tanzania. The results are compared with earlier results. The findings demonstrate that it is possible to find large height and yield differences between teak provenances. The best performing provenance grows some 10% (height) to 40% (volume) better than the average. The provenance Topslip, India, consistently proved to be outstanding in terms of growth and stem quality confirming earlier evaluations at age 5 and 17 years. Tanzanian land races also proved to be superior, especially as regards stem straightness.
FAO: New_LocClim. Local Climate Estimator (2005): ESA Newsletter No 26 2004, 1-5 pp.
GRAUDAL, L., E. D. KJAER, V. SUANGTHO, P. SAARDAVUT and A. KAOSA (1999): Conservation of genetic resources of teak (Tectona grandis) in Thailand. Technical Note, DANIDA Forest Seed Centre No. 52, 39 pp.
HEDEGART, T. (1976): Breeding systems, variation and genetic improvement of teak (Tectona grandis L.f.). In: BURLEY, J. and STYLES, B. T. (Eds). Tropical trees: variation, breeding and conservation. Linn. Soc. Symp. Ser. No. 2. Academic Press, London.
HENDERSON, C. R. (1984): Applications of linear models in animal breeding. University of Guelph, Canada, 462 pp.
KADAMBI, K. (1972): Silviculture and management of teak. Bulletin No. 24. Scholl of Forestry, Stephen F. Austin State University, Nacogdoches, Texas, 137 pp.
KAOSA-ARD, A. (2000): Gains from provenance selection. In: T. ENTERS and C. T. S. NAIR (eds.). Site, Technology and Productivity of Teak Plantations. Proceedings, Bangkok, 2000. FORSPA publication No. 24/2000. Teaknet Publication No. 3. p. 191-207.
KEIDING, H. (1973): Forest Genetic resources information. FAO Forestry Occasional Paper 1, 38 pp.
KEIDING, H., H. WELLENDORF and E. B. LAURIDSEN (1986): Evaluation of an international series of teak provenance trials. Danida Forest Seed Centre (Danish Centre for Forest, Landscape and Planning), Denmark, 81 pp.
KEIDING, H. (1989): Seed collection from teak plantations at Mtibwa and Longuza, Tanzania. Report/note 7 p. Danida Forest Seed Centre, Denmark.
KJAER, E. D., E. B. LAURIDSEN and H. WELLENDORF (1995): Second evaluation of an international series of teak provenance trials. Danida Forest Seed Centre (Danish Centre for Forest, Landscape and Planning), Denmark, 118 pp.
KRISHNAPILLAY, B. (2000): Silviculture and management of teak plantations. Unasylva 51: 14-21.
KUANG, B., S. ZHEN, M. LUO and M. LIN (1996): Evaluation of aggregate genetic value of main characters of provenances of teak. Forest Research 9: 7-14.
KUMARAVELU, G. (1993): Teak in India. In: H. WOOD (ed.) Teak in Asia, FORSPA Publication No. 4, Bangkok, pp. 27-34.
MADOFFE, S. S. and J. A. MAGHEMBE (1988): Performance of teak (Tectona grandis) provenances seventeen years after planting at Longuza, Tanzania. Silvae Genetica 37: 175-178.
MUTHURAMKUMAR, S. and N. PARTHASARATHY (2000): Alpha diversity of lianas in a tropical evergreen forest in the Anamalais, Western Ghats, India. Diversity and Distributions 6: 1-14.
PANDEY, D. and C. BROWN (2000): Teak: a global overview. Unasylva 51: 3-13.
PEDERSEN, A. P. (1995): IUFRO Symposium on Innovations in Tropical Tree Seed Technology. Post Symposium Tour Guide, pp. 27-33.
PERSSON, A. (1971a): Observations from a provenance trial of Tectona grandis Linn. F. at Longuza, Tanga Region. Tanzania Silviculture Res. Note 22. Lushoto. 13 p.
PERSSON, A. (1971b): Observations from a progeny trial of Tectona grandis Linn. F. at Longuza, Tanga Region. Tanzania Silviculture Res. Note 24. Lushoto. 11 p.
SAS INST. INC. (1999): SAS OnlineDoc_ version eight, SAS Institute Inc., Cary, NC, USA, http://v8doc.sas.com/sashtml.
SHAPIRO, S. S. and M. B. WILK (1965): An analysis of variance test for normality (complete samples). Biometrika 52, 591-611.
SUHAENDI, H. (1998): Teak improvement in Indonesia. In: Teak for the Future - Proceedings of Second Regional Seminar on Teak. Myanmar 1995. Edited by: MASAKAZU KASHIO and KEVIN WHITE, FAO Regional Office for Asia and the Pacific.
WOOD, P. J. (1967): Teak planting in Tanzania. Proc. FAO World Symp. Man-made forests. Document 3: Canberra, A.C.T., pp. 1631-1644.