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Narrow genetic base in forest restoration with holm oak (Quercus ilex L.) in Sicily |
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| Authors: | Concetta Burgarella Miguel Navascués Álvaro Soto Ángel Lora Silvio Fici |
| Affiliation: | 1. Dip.to di Scienze Botaniche, Université di Palermo, Via Archirafi 38, 90123, Palermo, Italy 2. School of Biological Sciences, University of East Anglia, NR4 7TJ, Norwich, UK 3. Laboratoire d’écologie, école Normale Supérieure, 46 Rue d’Ulm, 75230, Paris, France 4. Dpto. Sistemas y Recursos Forestales, CIFOR-INIA, PO Box 8111, 28080, Madrid, Spain 5. Dpto. Silvopascicultura, ETSI Montes, Universidad Politécnica de Madrid, Ciudad Universitaria s/n, 28040, Madrid, Spain 6. Dpto. de Ingeniería Forestal, ETSIAM, Universidad de Cordoba, Av. Menéndez Pidal s/n, 14080, Córdoba, Spain |
| Abstract: | In order to empirically assess the effect of actual seed sampling strategy on genetic diversity of holm oak (Quercus ilex) forestations in Sicily, we have analysed the genetic composition of two seedling lots (nursery stock and plantation) and their known natural seed origin stand by means of six nuclear microsatellite loci. Significant reduction in genetic diversity and significant difference in genetic composition of the seedling lots compared to the seed origin stand were detected. The female and the total effective number of parents were quantified by means of maternity assignment of seedlings and temporal changes in allele frequencies. Extremely low effective maternity numbers were estimated (Nf e ≈ 2–4) and estimates accounting for both seed and pollen donors gave also low values (N e ≈ 35–50). These values can be explained by an inappropriate forestry seed harvest strategy limited to a small number of spatially close trees. |
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