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โครงการรวบรวมและจัดทําวารสารอิเล็กทรอนิกส์ มหาวิทยาลัยเกษตรศาสตร์

                                       วารสารวนศาสตร 31 (1) : 10-19 (2555)                      17
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              cultivation in tree farms. Based on the results   ACKNOWLEDGEMENTS
              obtained in the present study, the Songkhla
              and Phangnga populations that showed high           The authors gratefully acknowledge
              genetic diversity and large population sizes   Dr.  Suchitra Changtragoon, for support in
              are suitable populations for the establishment   the analysis of genetic diversity.  Funding
              of in situ gene conservation areas. Besides   for this study was granted by the Graduate
              in situ gene conservation measures, ex situ   School, Kasetsart University.
              gene conservation may be the only option
              when in situ gene conservation measures                REFERENCES
              are not applicable; for example, the stands
              are too small, fragmented, and threatened
              by encroachment. Based on the field survey    Chayamarit, K.  1997.  Thai Medicinal
              of the six populations, the habitats                Plant.  Vol. 6.  Forest Herbarium,
              of C. porrectum in the Satun, Phatthalung,          Royal Forest Department,Bangkok.
              Phuket, and Krabi populations have been             (in Thai)
              destroyed by  extensive deforestation. In    Ci, X.-Q., J.-Q. Chen, Q.-M. Li and J. Li.
              addition,  according to the results of the          2008.AFLP and ISSR analysis
              present study, these populations showed
              low genetic  diversity.  Thus, ex situ gene         reveals  high genetic variation and
              conservation will be considered as an option        inter-population differen tiation
              to conserve the genetic material from these         in fragmented populations of the
              populations that cannot be conserved using          endangered Litsea szemaois (Lauraceae)
              in situ gene conservation.                          from Southwest China.Plant  Syst
                                                                  Evol 273: 237-246
                        CONCLUSION
                                                           Denrungruang, P.  2007.  Preliminary assay
                     Inter simple sequence repeat markers         on antioxidative activity of some
              were successfully applied to study the genetic      Lauraceae barks.  Thai J. Biotechnol.
              diversity of C. porrectum from six populations      8 (1): 49-54.
              in southern Thailand.  The result showed that   Doyle, J.J. and J.L. Doyle.  1987.  A rapid
              the genetic diversity of this species was high      DNA isolation procedure for
              at the species level.  However, it was relatively
              low at the population level.  Among the six         small quantities of fresh leaf
              populations, the Songkhla and Phangnga              tissue.  Phytochemical Bulletin
              populations revealed the  highest genetic           19: 11-15.
              diversity, followed by the Satun, Phatthalung,   Ellstrand, N.C. and D.R. Elam.  1993.
              Phuket and Krabi populations, respectively.         Population genetic consequences
              UPGMA cluster analysis divided the populations      of small population size: Implications
              into two main groups.  The Phuket and Krabi
              populations formed one group, while the. Sa         for plant conservation. Annu. Rev.
              tun, Songkhla, Phangnga, and Phatthalung            Ecol. Syst. 24: 217-242.
              populations were in the other group. This is   Fan, Y.B., R.M. Wang, F.J. Pan and P.S
              the  first report concerning the genetic             Yang.  2006.  Study of the floral and
              diversity of C. porrectum and provides basic        pollination biology of Cinnamomum
              genetic information which should acilitate          camphora and Litsea cubeba
              attempts to conserve this species.
                                                                  (Lauraceae). Journal of the National
                                                                  Taiwan Museum 59 (1): 75-90.
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