TROPICS Tropical Forestry Projects Information System

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 Regional: Central America

Assessment of genetic diversity of economically and ecologically important tropical tree species of Central America and the Caribbean
Figures are indicative, and subject to revision
Some projects may contain substantial non-forest related components
Funder reference :ERBTS3* CT940316
Funded through :Science
DGXII
STD-III
Year :1994
Engaged :350,000 Euro
Further information :DGXII Published Information
Information in the TROPICS system is provisional only
Comments and suggestions to tropics@odi.org.uk
 

STD3-95
DGXII Published Information
Funded joint research projects - 1995 edition

Contract Number ERBTS3*CT940316

ASSESSMENT OF GENETIC DIVERSITY OF ECONOMICALLY

AND ECOLOGICALLY IMPORTANT TROPICAL TREE SPECIES OF CENTRAL AMERICA AND THE CARIBBEAN : IMPLICATIONS FOR CONSERVATION, SUSTAINABLE UTILIZATION AND MANAGEMENT

Objectives

The main objectives are :

F
To develop tools to assess genetic diversity in tropical tree species using molecular techniques.

F
To assess genetic diversity in populations of economically important species, namely mahogany (Swietenia spp.), spanish cedar (Cedrela odorata) and white cedar (Tabebuia heterophylla), in Central America and the Caribbean, and identify populations with particular value for conservation and breeding.

F
To assess levels and organisation of genetic diversity in a range of ecologically important species in natural tropical forests.

F
To identify biological or anthropic factors (including silviculture and forest fragmentation) contributing to decreases in genetic diversity.

F
To promote training in techniques for studying genetic variation in tropical woody plants.

Activities

The key activities envisaged are :

*
the development and implementation of appropriate molecular techniques;

*
the collection of Tabebuia heterophylla in the Antilles, the establishment of gene banks and assessment of its genetic diversity;

*
the mapping, inventory and collection of material from Swietenia populations (predominantly S. macrophylla) in Central America and the Caribbean;

*
assessment of genetic diversity in Swietenia and Cedrela pupulations;

*
assessments of genetic erosion in Swietenia, development of conservation and utilization strategies, establishment of gene banks and provenances tests;

*
collection of progenies of Dicorynia guianensis, Virola surinamensis, Ocotea rubra, Eperua grandiflora and Vouacapoua americana, estimation of their mating system and gene flow parameters and evaluation of the relationship between life history traits and levels of genetic diversity;

*
preliminary studies of other key species including Vochysia guatemalensis and Cedrela odorata and evaluation of relationships between molecular and morphological variation;

*
training in molecular methods, sample collection and herbarium techniques.

Expected Outcome

The work carried out in this project should contribute to the sustainable use and management of tropical forests by : determining the effects of selective logging and forest fragmentation on within species genetic diversity; identifying populations of target tree species of particular value for conservation or as gene pools for tree improvement; the establishment of gene banks and the founding of breeding populations of Swietenia for tree improvement work; and by increasing understanding of the relationships between genetic diversity and life history traits and assessing factors which contribute to losses in diversity.

Information in the TROPICS system is provisional only
Comments and suggestions to tropics@odi.org.uk