The Australian Tree Seed Centre (ATSC) is a seed centre under the Forestry and Forest Products Division of the Australian Commonwealth Scientific and Industrial Research Organisation (CSIRO).

Bioversity International, an international organization, developing research on conservation and use of agricultural biodiversity.

Central America and Mexico Coniferous Resources Cooperative based at North Carolina State University. The objective of the cooperative is: "to conserve, test, and improve forest species in the tropics and subtropics for the benefit of humankind."

Centro Agronómico Tropical de Investigación y Enseñanza, Turrialba, Costa Rica.

Center for International Forestry Research, based in Jakarta, Indonesia.

The Convention on Biological Diversity

The Danida Forest Seed Centre (DFSC) is a seed center financed by the Danish International Development Aid (Danida). The center is situated in Denmark, but activitites are directed towards developing countries with special focus on procurement and handling of tree seed, conservation of forest genetic resources and tree improvement.

Dendrome is a collection of forest tree genome databases and other forest genetic information resources for the international forest genetics community. Dendrome is a project of the Institute of Forest Genetics, Pacific Southwest Research Station, USDA Forest Service.

The ETFRN Network seeks to promote the involvement of European research expertise towards the conservation and wise use of forests and woodlands in tropical and subtropical countries.

The European Forest Genetic Resources Programme (EUFORGEN) is a collaborative programme among European countries aimed at ensuring the effective conservation and the sustainable use of forest genetic resources in Europe.

The site provides a range of tree-improvement-related documents, including a glossary of tree improvement terms.

The Information System on Genetic Resources (GENRES) is maintained by the Information Centre for Genetic Resources at the German Centre for Documentation and Information in Agriculture, under the auspices of the German Federal Ministry of Food, Agriculture and Forestry.

The Laboratory of Forest Genetics and Tree Improvement of INRA Cestas (Institut National de la Recherche Agronomique) is conducting activities in population and quantitative genetics of temperate and tropical tree species.

The International Plant Genetic Research Institute, based in Rome, Italy. Now Bioversity International.

The International Plant Names Index (IPNI) is a database of the names and associated basic bibliographical details of all seed plants, it is the product of a collaboration between The Royal Botanic Gardens, Kew, The Harvard University Herbaria and the Australian National Herbarium.

The International Poplar Commission (IPC) is one of the Statutory Bodies of FAO. Notwithstanding its name, the mandate of the Commission covers willows as well as poplars.

International Union of Forestry Research Organizations, based in Vienna, Austria.

The Finnish Forest Research Institute's (METLA) page on forest genetics and tree breeding.

The South Pacific Regional Initiative on Forest Genetic Resources.

The international tree seed supplier directory developed by ICRAF in technical collaboration with FAO, DFSC and IUFRO, with funding from DFID, BMZ and VVOB.

Formerly known as the International Centre for Research in Agroforestry (ICRAF), based in Nairobi, Kenya.