Impact of conservation measures on demography and genetic variability of livestock breeds |
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Affiliation: | 1. Animal Production and Health Division, Food and Agriculture Organization of the United Nations, Viale delle Terme de Caracalla, 00153 Rome, Italy;2. Norsk Hestesenter, Starumsvegen 71, 2850 Lena, Norway;3. Instituto Nacional de Investigación y Tecnología Agraria y Alimentaria, Crta. de la Coruña, km 7,5, 28040 Madrid, Spain;4. Institut de l’Elevage, 149 rue de Bercy, 75595 Paris Cedex 12, France;5. REC Raumberg-Gumpenstein, Institute of Organic Farming and Farm Animal Biodiversity, 4601 Thalheim, Austria;6. Federación de Razas Autóctonas de Galicia, Fontefiz,s/n.32152.Coles, Ourense, Spain |
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Abstract: | Conservation of animal genetic resources requires regular monitoring and interventions to maintain population size and manage genetic variability. This study uses genealogical information to evaluate the impact of conservation measures in Europe, using (i) data from the Domestic Animal Diversity Information System (DAD-IS) and (ii) a posteriori assessment of the impact of various conservation measures on the genetic variability of 17 at-risk breeds with a wide range of interventions. Analysis of data from DAD-IS showed that 68% of national breed populations reported to receive financial support showed increasing demographic trends, v. 51% for those that did not. The majority of the 17 at-risk breeds have increased their numbers of registered animals over the last 20 years, but the changes in genetic variability per breed have not always matched the trend in population size. These differences in trends observed in the different metrics might be explained by the tensions between interventions to maintain genetic variability, and development initiatives which lead to intensification of selection. |
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Keywords: | genetic variability effective population size endangered breeds conservation pedigree |
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