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This article in CS

  1. Vol. 52 No. 6, p. 2606-2618
     
    Received: Mar 2, 2012
    Published: October 10, 2012


    * Corresponding author(s): celine.benini@gmail.com
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doi:10.2135/cropsci2012.03.0147

Conservation and Management of a Threatened Traditional Agroresource, Ylang-Ylang, in the Indian Ocean Islands

  1. Céline Benini *ad,
  2. Grégory Mahyb,
  3. Jean-Marie Jacqueminc,
  4. Marie-Laure Fauconniera,
  5. Patrick du Jardina and
  6. Jean-Philippe Bizouxbe
  1. a Plant Biology Unit, Gembloux Agro-Bio Tech, University of Liège, Passage des Déportés, 2, 5030 Gembloux, Belgium
    d C. Benini holds a Ph.D. fellowship from the Fund for Research Training in Industry and Agriculture (FRIA)
    b Biodiversity and Landscape Unit, Gembloux Agro-Bio Tech, University of Liège, 27 avenue Maréchal Juin, 5030 Gembloux, Belgium
    c Life Science Department, Agronomic Research Center, Chaussée de Charleroi, 234, 5030 Gembloux, Belgium. The research was supported by the FNRS (Fonds National de la Recherche Scientifique, FRFC project 2.4583.09)
    e J.P. Bizoux is a postdoctoral researcher of FRS-FNRS

Abstract

To handle future economic, social, and environmental changes, the assessment, management, and conservation of the local genetic resources of cash crop species is a fundamental requirement. We investigated the pattern of genetic and morphological diversity of ylang-ylang [Cananga odorata (Lam.) Hook f. and Thomson forma genuina], an important essential oil tree in the introduction area of the western Indian Ocean islands. We sought to identify key elements for developing a conservation and management strategy for ylang-ylang genetic resources. Genetic and morphological variations were assessed using amplified fragment length polymorphism and morphometrics traits. Information about farmers’ practices was collected. The existence of substantial total genetic diversity (HT = 0.2599) and the grouping of plantations into different genetic groups suggest a series of introduction events in the area, with limited exchanges of genetic material within and between islands. The morphological study revealed high phenotypic variability despite similar agronomical practices. The morphological and genetic variability might have been created and maintained without any planned management. This has determined the genetic structuring in the area (11.74% genetic variation among islands and 20.68% among plantations). On-farm preservation and the maintenance of the current management practices are recommended. Ex situ conservation efforts should also be undertaken if economically affordable.

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Copyright © 2012. Copyright © by the Crop Science Society of America, Inc.