Pakistan Journal of Biological Sciences1028-88801812-5735Asian Network for Scientific Information10.3923/pjbs.2006.1047.1051Acacia Species]]>ShukorNor Aini Ab.TeeK. C.KeenC. John6200696The investigation of the extent and pattern of genetic variation for isozyme analysis of five selected Acacia species (Acacia crassicarpa, Acacia hybrid, Acacia mangium, Acacia auriculiformis and Acacia aulacocarpa) were carried out using the horizontal starch gel electrophoresis. The analyses on 21 enzymes were coded by 43 loci in A. crassicarpa, 46 loci in A. aulacocarpa, 47 loci in Acacia hybrid, A. mangium and A. auriculiformis. The levels of polymorphic loci for these species ranged from 0.4898 in A. crassicarpa and A. auriculiformis to 0.6596 in Acacia hybrid. Meanwhile, the mean observed heterozygosity varied from 0.1057 in A. auriculiformis to 0.1645 in A. aulacocarpa. Low levels of genetic variability were found in A. crassicarpa, A. mangium and A. auriculiformis but were high in the Acacia hybrid and A. aulacocarpa. The extent of genetic identities ranged from 0.7225 to 0.8778. The least related species were A. mangium and A. auriculiformis, while the most related species were the Acacia hybrid and A. mangium. These species were clustered into three main phylogenetic groups. Factors involving geographical distribution, population size, selection and ecological background were suggested to explain for the polymorphism, heterozygosity paradox and the genetic identity of these species. The Acacia hybrid was identified to be the most promising species in terms of its genetic variability.]]>Zuhaidi, Y.A. and D. Ahmad,19951995Chamberlain, J.R., E.E. Hughes and N.W. Galwey,1994Leucaena shannoii Alliance (Leguminosea Mimosoideae).]]>4517Conkle, M.T.,19921992pp: 5-22pp: 5-22Danzamann, R.G. and G.P. Burchert,19831983pp: 232248Dusan, G.,1992Pice a abies Karst) populations.]]>54215223Feret, P.P. and F. Bergmann,19761976pp: 49-77pp: 49-77Ferguson, A.,1980pp: 194pp: 194Hamidi, A.H.,1990Acacia mangium willd.]]>1990Hamrick, J.L.,19831983pp: 335-348pp: 335-348Hamrick, J.L. and M.D. Loveless,198618201207Hamrick, J.L., M.J.W. Godt and S.L. Sherman-Broyles,1992695124Harper, J.L.,19771st Edn.,Ikediobi, C.O. and L.C. Igboanusi,1983Dioscorea spp.) species and cultivars by use of electrophoretic patterns of soluble tuber proteins.]]>156567John Keen, E., 1996Acacia crassicarpa A. Cunn. Ex. Benth by isozyme and RAPD analyses.]]>1996Joly, H.I., M.Z. Nlo, P. Danthu and E. Aygalent,1992Acacia, Acacia albida.I. Genetic diversity of populations from West Africa.]]>405973Khasa, P.D., W.M. Cheliak and J. Boousquet,1994Racosperma auriculiforme and Rascoperma mangium using allozymes.]]>2411231132Kim, Z.S., S.W. Lee and J.W. Hwang,1997Pinus thunbergii in Korea.]]>46120124Loveless, M.D. and J.L. Hamrick,198735165175Millar, C.I. and R.D. Westfall,19926347371Mitton, J.B. and R. Aadalora,1981Picea pungens and Englemann spruce Picea engelmannii in the Colorado front range.]]>5920882094Moran, G.F., O. Mauna and J.C. Bell,1989Acacia mangium a tropical forest tree of the coastal lowlands with low genetic diversity.]]>43231235Moran, G.F., O. Mouna and J.C. Bell,1989Acacia auriculiformis and Acacia crassicarpa.]]>21250256Playford, J., J.E. Bell and G.F. Moran,1993Acacia melanoxylon R. Br.]]>41355368Rosman, A. and A.S. Nor Aini,1993Crangon crangon L.) and Crangon allamanni (Decapoda, Cariba).]]>64114121Turnbull, J.W.,1986pp: 128-129pp: 128-129Wickneswari, R.,1989Acacia mangium x Acacia Auriculiformis hybrid seed production orchard.]]>2157164Wickneswari, R. and M. Norwati,1993Acacia auriculiformis.]]>416577Wright, J.W.,1976pp: 65-82pp: 65-82Yap, S.K.,1987Acacia Species to Peninsular Malaysia.]]>1987pp: 151-153pp: 151-153