Pollen-mediated gene flow in a highly fragmented landscape: consequences for defining a conservation strategy of the relict Laperrine's olive.

Détails

ID Serval
serval:BIB_183553678DF0
Type
Article: article d'un périodique ou d'un magazine.
Collection
Publications
Institution
Titre
Pollen-mediated gene flow in a highly fragmented landscape: consequences for defining a conservation strategy of the relict Laperrine's olive.
Périodique
Comptes Rendus Biologies
Auteur⸱e⸱s
Besnard G., Baali-Cherif D., Bettinelli-Riccardi S., Parietti D., Bouguedoura N.
ISSN
1768-3238[electronic], 1631-0691[linking]
Statut éditorial
Publié
Date de publication
2009
Peer-reviewed
Oui
Volume
332
Numéro
7
Pages
662-672
Langue
anglais
Résumé
In the present central Saharan conditions, the Laperrine's olive regeneration has never been observed and its populations are locally threatened. The production of plants originating from seeds was proposed as a multiplication strategy. In order to determine the impact of sexual reproduction, seeds issued from ten mothers (sampled from four locations in the Hoggar, Algeria) were genotyped using microsatellites. Compared to the initial population, a significant lost of allelic richness was revealed, indicating that our seed sampling was not representative of the local gene diversity. Paternity analyses allowed measurement of the effective pollen-mediated gene flow within patches. Preferential mating between some genotypes was revealed. A trend for a higher multipaternity on seeds collected on trees from relatively large patches was also observed. Lastly, seedlings issued from trees of small patches displayed low growth performance. The implications of our observations in the development of an efficient conservation strategy by seeds are discussed.
Mots-clé
Conservation genetics, Genetic drift, Olea europaea, Pollen flow, Seed paternity
Pubmed
Web of science
Création de la notice
27/04/2009 13:24
Dernière modification de la notice
21/08/2019 5:13
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