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Centennial olive trees as a reservoir of genetic diversity

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Centennial olive trees as a reservoir of genetic diversity

dc.contributor.author	Díez, Concepción M.	es_ES
dc.contributor.author	Trujillo, Isabel	es_ES
dc.contributor.author	Barrio Esparducer, Eladio	es_ES
dc.contributor.author	Belaj, Angjelina	es_ES
dc.contributor.author	Barranco, Diego	es_ES
dc.contributor.author	Rallo, Luis	es_ES
dc.date.accessioned	2015-06-22T09:51:17Z
dc.date.available	2015-06-22T09:51:17Z
dc.date.issued	2011	es_ES
dc.identifier.citation	Annals of Botany Vol. 108 Issue 5: pp. 797-807	es_ES
dc.identifier.uri	http://hdl.handle.net/10550/44672
dc.description.abstract	Background and AimsGenetic characterization and phylogenetic analysis of the oldest trees could be a powerful tool both for germplasm collection and for understanding the earliest origins of clonally propagated fruit crops. The olive tree (Olea europaea L.) is a suitable model to study the origin of cultivars due to its long lifespan, resulting in the existence of both centennial and millennial trees across the Mediterranean Basin.MethodsThe genetic identity and diversity as well as the phylogenetic relationships among the oldest wild and cultivated olives of southern Spain were evaluated by analysing simple sequence repeat markers. Samples from both the canopy and the roots of each tree were analysed to distinguish which trees were self-rooted and which were grafted. The ancient olives were also put into chronological order to infer the antiquity of traditional olive cultivars.Key ResultsOnly 9·6 % out of 104 a priori cultivated ancient genotypes matched current olive cultivars. The percentage of unidentified genotypes was higher among the oldest olives, which could be because they belong to ancient unknown cultivars or because of possible intra-cultivar variability. Comparing the observed patterns of genetic variation made it possible to distinguish which trees were grafted onto putative wild olives.ConclusionsThis study of ancient olives has been fruitful both for germplasm collection and for enlarging our knowledge about olive domestication. The findings suggest that grafting pre-existing wild olives with olive cultivars was linked to the beginnings of olive growing. Additionally, the low number of genotypes identified in current cultivars points out that the ancient olives from southern Spain constitute a priceless reservoir of genetic diversity.	es_ES
dc.subject	Olea europaea	es_ES
dc.subject	wild olives	es_ES
dc.subject	traditional cultivars	es_ES
dc.subject	microsatellite markers	es_ES
dc.subject	intracultivar variability	es_ES
dc.subject	domestication	es_ES
dc.subject	in situ conservation	es_ES
dc.title	Centennial olive trees as a reservoir of genetic diversity	es_ES
dc.type	journal article	es_ES
dc.identifier.doi	10.1093/aob/mcr194	es_ES
dc.identifier.idgrec	074392	es_ES