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New Forests

, Volume 43, Issue 4, pp 411–428 | Cite as

Genetic diversity in natural populations of Gmelina arborea: implications for breeding and conservation

  • Alison K. S. Wee
  • ChunHong Li
  • William S. Dvorak
  • Yan HongEmail author
Article

Abstract

Gmelina arborea is a valuable plantation tree species that is native to South and Southeast Asia. In this study, 534 samples representing 19 natural populations in India, China, Thailand and Myanmar were analyzed with 10 polymorphic microsatellite markers. The genetic diversity analysis revealed highly polymorphic loci (Na = 16.4), a good level of genetic diversity (Ho = 0.56; He = 0.83) and the deficiency of heterozygotes in G. arborea populations evidenced by positive fixation index and deviation from Hardy–Weinberg Equilibrium in all loci and most populations. The Analysis of Molecular Variance attributed 21, 10 and 69% of total genetic diversity to among-region, among-population (within region) and within-population variation. Unweighted Pair Group Method with Arithmetic Mean dendrogram and Principle Coordinate Analysis revealed three separate clusters composed of China, India and Thailand/Myanmar that were consistent with geographical distance and the presence of natural barriers to gene flow. Populations from within India grouped together genetically consistent with geographical locations, with the exception of the Nowgong population (eastern India), that might have originated from the Kasa area (western India) with which it has high genetic similarity. Understanding genetic diversity and structure of G. arborea populations serve as an important reference for tree breeding programs and conservation strategy. Breeding populations of G. arborea should include selections from each of the major geographic regions to maximize genetic diversity and heterosis. Vegetative propagated clones of elite trees can be used for plantation to address the issue of high level of segregation among seed derived plants.

Keywords

SSR Gmelina arborea Genetic diversity Genetic structure Plantation Tree improvement 

Notes

Acknowledgments

Temasek Life Sciences Laboratory provided funding to this research. We thank Mr. Willi Woodbridge, Camcore, USA for his development of the Gmelina map. We thank Mr. Mike Tighe, (formerly Camcore, USA), Mr. Arif Purwanto (Sumalindo, Indonesia) and Mr. Miguel Rodriguez (Pizano, Colombia) for sending plant materials or DNAs for this study.

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Copyright information

© Springer Science+Business Media B.V. 2011

Authors and Affiliations

  • Alison K. S. Wee
    • 1
  • ChunHong Li
    • 2
  • William S. Dvorak
    • 3
  • Yan Hong
    • 2
    Email author
  1. 1.Department of Biological SciencesNational University of SingaporeSingaporeSingapore
  2. 2.Temasek Life Sciences LaboratoryNational University of SingaporeSingaporeSingapore
  3. 3.Camcore, Department of Forestry and Environmental ResourcesNorth Carolina State UniversityRaleighUSA

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