Narrow genetic base in forest restoration with holm oak (Quercus ilex L.) in Sicily

Burgarella, Concetta; Navascués, Miguel; Soto, Álvaro; Lora, Á.; Fici, Silvio

doi:10.1051/forest:2007055

Cited by 24 publications

(16 citation statements)

References 40 publications

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“…The genetic structure of plant populations reflects the interactions among different factors, including the long-term evolutionary history of the species, genetic drift, mating system, gene flow and selection (Burgarella et al, 2007;Schaal et al, 1998). Geographically disjunct populations showed higher genetic structure than populations with more continuous distributions (Hamrick and Godt 1996;Premoli et al, 2001).…”

Section: Discussionmentioning

confidence: 99%

Genetic structure of Tunisian natural carob tree (Ceratonia siliqua L.) populations inferred from RAPD markers

et al. 2008

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Abstract• Seven RAPD markers were used to assess the genetic diversity and structure of ten Tunisian natural Ceratonia siliqua L. populations from different geographic and bioclimatic zones.• The species maintain a high diversity within population as estimated by the percentage of polymorphic loci and Shannon's index (P% = 76.31, H pop = 0.569). The range of variation between populations was large. Populations from the upper semi-arid bioclimates, with more continuous distribution area showed the highest level of variation.• A high genetic differentiation among populations (Φ ST = 0.250 and G ST = 0.347), as a result of population isolation was revealed. Nevertheless, the genetic structure is in accordance with bioclimate indicating that ecological factors also should influence differentiation. Populations from the sub-humid, upper semi-arid and mean semi-arid zones clustered together and were distinct from those of the lower semi-arid ones.• Conservation strategy should be made according to the level of polymorphism within population and bioclimate.Mots-clés : diversité génétique / RAPD / Ceratonia siliqua / populations naturelles / bioclimat / conservation Résumé -Structure génétique des populations naturelles du caroubier (Ceratonia siliqua L.) en Tunisie estimée par les marqueurs RAPD.• Sept marqueurs RAPD ont été utilisés pour analyser la diversité et la structure génétique de dix populations tunisiennes de caroubier (Ceratonia siliqua L.) prospectées dans différentes zones géo-graphiques et bioclimatiques.• L'espèce maintient une diversité génétique intra population importante (P% = 76.31 ; H pop = 0.569) et les niveaux de variation diffèrent selon les populations. Celles du subhumide et du semi-aride supérieur, à aire de distribution plus continue, ont montré la variation la plus importante.• Une forte différenciation (Φ ST = 0.250 et G ST = 0.347) entre les populations, due à leur fragmentation récente, est observée. Toutefois, cette différenciation concorde avec le bioclimat des sites témoi-gnant l'influence des facteurs écologiques dans cette différenciation. Les populations du subhumide, du semi-aride supérieur et du semi-aride moyen constituent un groupe distinct de celui représenté par les populations du semi-aride inférieur.• La conservation des populations doit tenir compte de leur niveau de diversité génétique intra population et du bioclimat.

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Section: Discussionmentioning

confidence: 99%

Genetic structure of Tunisian natural carob tree (Ceratonia siliqua L.) populations inferred from RAPD markers

et al. 2008

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“…The reasons for these decreases encompassed inappropriate seed‐harvesting strategies (Burgarella et al . ), unreliable commercial seeds (Fant et al . ; Aavik et al .…”

Section: Meta‐analysis Of the Use Of Genetics In Ecological Restorationmentioning

confidence: 99%

Contribution of genetics to ecological restoration

et al. 2014

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Ecological restoration of degraded ecosystems has emerged as a critical tool in the fight to reverse and ameliorate the current loss of biodiversity and ecosystem services. Approaches derived from different genetic disciplines are extending the theoretical and applied frameworks on which ecological restoration is based. We performed a search of scientific articles and identified 160 articles that employed a genetic approach within a restoration context to shed light on the links between genetics and restoration. These articles were then classified on whether they examined association between genetics and fitness or the application of genetics in demographic studies, and on the way the studies informed restoration practice. Although genetic research in restoration is rapidly growing, we found that studies could make better use of the extensive toolbox developed by applied fields in genetics. Overall, 41% of reviewed studies used genetic information to evaluate or monitor restoration, and 59% provided genetic information to guide prerestoration decision-making processes. Reviewed studies suggest that restoration practitioners often overlook the importance of including genetic aspects within their restoration goals. Even though there is a genetic basis influencing the provision of ecosystem services, few studies explored this relationship. We provide a view of research gaps, future directions and challenges in the genetics of restoration.

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“…Five mixed woods were more intensively sampled (775 individuals). Two of them (Castilla-La Mancha and Sicily) include part of the individuals used in Soto et al (2007) and Burgarella et al (2007). In the mixed population of Minorca, the sample includes all existing cork oaks on the island (67 individuals).…”

Section: Sampling Strategymentioning

confidence: 99%

Detection of hybrids in nature: application to oaks (Quercus suber and Q. ilex)

et al. 2009

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Powerful and accurate detection of first-generation (F1) hybrids and backcrosses in nature is needed to achieve a better understanding of the function and dynamics of introgression. To document the frequency of ongoing interspecific gene exchange between two Mediterranean evergreen oaks, the cork oak (Quercus suber) and the holm oak (Q. ilex), we analyzed 1487 individuals originating from across the range of the two species using eight microsatellite loci and two Bayesian clustering approaches (implemented in the programs STRUCTURE and NEWHY-BRIDS). Simulated data were used to assess the differences between the two clustering methods and to back up the choice of the threshold value for the posterior probability to discriminate admixed from pure individuals. We found that the use of STRUCTURE resulted in the highest power to detect hybrids, whereas NEWHYBRIDS provided the highest accuracy. Irrespective of the approach, the two species were clearly distinguished as independent genetic entities without any prior information. In contrast with previous reports, we found no evidence for unidirectional introgression. The overall hybridization rate was very low (o2% of introgressed individuals). Only two individuals were identified as F1 hybrids and five as early backcrosses. This work shows that the combined application of the two complementary Bayesian approaches and their systematic validation with simulations, fit for the case at hand, helps gain resolution in the identification of admixed individuals.

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Narrow genetic base in forest restoration with holm oak (Quercus ilex L.) in Sicily

Cited by 24 publications

References 40 publications

Genetic structure of Tunisian natural carob tree (Ceratonia siliqua L.) populations inferred from RAPD markers

Genetic structure of Tunisian natural carob tree (Ceratonia siliqua L.) populations inferred from RAPD markers

Contribution of genetics to ecological restoration

Detection of hybrids in nature: application to oaks (Quercus suber and Q. ilex)

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