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Indicators of the genetic diversity of trees – State, pressure, benefit and response

The State of the World’s Forest Genetic Resources – Thematic study













Graudal, L., Loo, J., Fady, B., Vendramin, G., Aravanopoulos, F.A., Baldinelli, G., Bennadji, Z., Ramamonjisoa, L., Changtragoon, S. and Kjær, E.D. 2020. Indicators of the genetic diversity of trees – State, Pressure, benefit and response. State of the World’s Forest Genetic Resources – Thematic study. Rome, FAO.




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    State of the World’s Forest Genetic Resources – Thematic study
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    This study, prepared within the ambit of The State of the World’s Forest Genetic Resources, reviews what is known about the value of trees for tropical rural communities. It focuses on non-timber products harvested from trees in natural and managed forests and woodlands, the various products and services obtained from trees planted or retained in agroforestry systems, and the commercial products of tree commodity crops. The role of intra-specific genetic variation in determining the value of trees in supporting livelihoods is discussed in each of the three contexts. The study also identifies specific points that should be given particular attention in the future to better support tree-based livelihoods of rural communities in the tropics.
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    Is a forest with 1 000 species better, and managed better, than a forest with 500 species? This issue of Unasylva looks at issues related to forest biological diversity and its conservation and sustainable use. One of the key messages is that numbers are not the only issue.
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    Incorporating genetic diversity and indicators into statistics and monitoring of farmed aquatic species and their wild relatives 2017
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    The FAO Commission on Genetic Resources for Food and Agriculture, realizing that substantial production from aquaculture and capture fisheries is based on groups below the level of the species and that genetic information has a variety of uses in fishery management, requested FAO to undertake a thematic study to explore incorporating genetic diversity and indicators into statistics and monitoring of farmed aquatic species and their wild relatives. Information about aquatic genetic resources can be extremely useful to resource managers, policy-makers, private industry and the general public. Not only is genetic diversity the basic building block for selective breeding programmes in aquaculture and for natural populations to adapt to changing environments and evolve, but information on genetic diversity can also be used, inter alia, to help meet production and consumer demands, to prevent and diagnose disease, to trace fish and fish products in the production chain, to monitor impacts of alien species on native species, to differentiate cryptic species, to manage broodstock, and to design more effective conservation and species recovery programmes. However, the majority of resource managers and those government officials submitting information to FAO do not use or have sufficient access to information on aquatic genetic diversity of farmed species and their wild relatives.

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