title: Sterol composition of virgin olive oil of forty-three olive cultivars from the World Collection Olive Germplasm Bank of Cordoba.
abstract: BACKGROUND
  In olive oil, sterols constitute the majority of the unsaponifiable fraction. In recent years there has been increased interest in the sterols of olive oil for their health benefits and their importance to virgin olive oil (VOO) quality regulation.
  
  
  RESULTS
  Forty-three olive (Olea europaea L.) cultivars from the World Olive Germplasm Bank, IFAPA Centro 'Alameda de Obispo', Cordoba, Spain were studied for their oil sterol composition and total content. The main sterols found in olive oil were β-sitosterol, Δ(5) -avenasterol, campesterol and stigmasterol, most of them showing high variability. Most cultivars showed total sterol contents within the limits established by EU regulations, although 28% of VOOs analysed were outside the limits established for total content and/or for individual sterols. Over the group of cultivars, total sterol contents ranged from 855 to 2185 mg kg(-1) .
  
  
  CONCLUSIONS
  The high variability observed was due to the genetic component, since other agronomic and technological factors were similar. Because of the high variability, the sterol fraction can be considered as a useful tool to characterize and discriminate monovarietal VOOs. The results can be useful for nutritionists for VOO inclusion in nutrition studies. Furthermore, the variability observed can be applied in olive breeding projects to select the parents of new olive cultivars with an improved sterol fraction. © 2016 Society of Chemical Industry.
authors.affiliation: IFAPA Centro 'Venta del Llano', Junta de Andalucía, PO Box 50, Mengíbar, E-23620 Jaén, Spain.
authors.forename: Onejda
authors.initials: O
authors.lastname: Kyçyk
authors.affiliation: IFAPA Centro 'Venta del Llano', Junta de Andalucía, PO Box 50, Mengíbar, E-23620 Jaén, Spain.
authors.forename: Maria Paz
authors.initials: MP
authors.lastname: Aguilera
authors.affiliation: Center for Advanced Studies in Olive Grove and Olive Oils, University of Jaén, Campus Las Lagunillas, E-23071, Jaén, Spain.
authors.forename: José Juan
authors.initials: JJ
authors.lastname: Gaforio
authors.affiliation: IFAPA Centro 'Venta del Llano', Junta de Andalucía, PO Box 50, Mengíbar, E-23620 Jaén, Spain.
authors.forename: Antonio
authors.initials: A
authors.lastname: Jiménez
authors.affiliation: IFAPA Centro 'Venta del Llano', Junta de Andalucía, PO Box 50, Mengíbar, E-23620 Jaén, Spain.
authors.forename: Gabriel
authors.initials: G
authors.lastname: Beltrán
mesh_terms: D002617:Chemical Industry; D005638:Fruit / Q000737:chemistry; D005838:Genotype; D031658:Olea / Q000737:chemistry* / Q000145:classification / Q000235:genetics; D000069463:Olive Oil / Q000737:chemistry*; D000069600:Plant Breeding; D000068098:Seed Bank; D012855:Sitosterols / Q000032:analysis; D013030:Spain; D013045:Species Specificity; D013261:Sterols / Q000032:analysis*
chemical_list: D000069463:Olive Oil; D012855:Sitosterols; D013261:Sterols; C025473:gamma-sitosterol
keywords: Olea europaea L; chemometeric analysis; olive cultivars; sterol composition