title: Associations between major fatty acids in plant oils fed to dairy goats and C18 isomers in milk fat.
abstract: Relationships between fatty acids (FAs) in plant oils included in goat diets and milk fat C18 isomers were determined by Principal Factor Analysis (PFA). The three first principal factors (PF1, PF2 and PF3) accounted for 64.5% of the total variation in milk FAs contents. Fatty acids with a double bond at carbons 13, 14, 15 or 16 had high (>0.6) and positive loadings for PF1, trans-4 to trans-8 C18:1 for PF2, whereas trans-10 C18:1, trans-11 C18:1 and cis-9 trans-11 C18:2 showed high and positive loadings for PF3. Pearson's correlations supported that PF1, PF2 and PF3 were related to α-linolenic, oleic and linoleic acid intakes, respectively. Our results show that the quantitatively main FAs in plant lipids supplemented to dairy ruminants are often the main cause of the observed changes in milk C18 isomer contents. However, sometimes the observed changes are caused, or at least are influenced, by other FAs present in lower quantities in the plant lipids. Thus, using mixtures of plant oils with differently unsaturated main FAs could be a way of tailoring milk fat composition to a pre-designed pattern.
authors.affiliation: Departamento de Producción Animal,Universidad de Córdoba,Ctra. Madrid-Cádiz,km 396. Campus de Rabanales,14071Córdoba,Spain.
authors.forename: Andrés L
authors.initials: AL
authors.lastname: Martínez Marín
authors.affiliation: Instituto de Investigación en Ciencias de la Alimentación (CSIC-UAM),Nicolás Cabrera, 9. Universidad Autónoma de Madrid,28049Madrid,Spain.
authors.forename: Pilar
authors.initials: P
authors.lastname: Gómez-Cortés
authors.affiliation: Departamento de Producción Animal,Universidad de Córdoba,Ctra. Madrid-Cádiz,km 396. Campus de Rabanales,14071Córdoba,Spain.
authors.forename: Nieves
authors.initials: N
authors.lastname: Núñez Sánchez
authors.affiliation: Instituto de Investigación en Ciencias de la Alimentación (CSIC-UAM),Nicolás Cabrera, 9. Universidad Autónoma de Madrid,28049Madrid,Spain.
authors.forename: Manuela
authors.initials: M
authors.lastname: Juárez
authors.affiliation: Departamento de Producción Animal,Universidad de Córdoba,Ctra. Madrid-Cádiz,km 396. Campus de Rabanales,14071Córdoba,Spain.
authors.forename: Ana I
authors.initials: AI
authors.lastname: Garzón Sigler
authors.affiliation: Departamento de Producción Animal,Universidad de Córdoba,Ctra. Madrid-Cádiz,km 396. Campus de Rabanales,14071Córdoba,Spain.
authors.forename: Francisco
authors.initials: F
authors.lastname: Peña Blanco
authors.affiliation: Instituto de Investigación en Ciencias de la Alimentación (CSIC-UAM),Nicolás Cabrera, 9. Universidad Autónoma de Madrid,28049Madrid,Spain.
authors.forename: Miguel Angel
authors.initials: MA
authors.lastname: de la Fuente
mesh_terms: D000821:Animal Feed / Q000032:analysis*; D000818:Animals; D004032:Diet / Q000662:veterinary; D019587:Dietary Supplements; D005227:Fatty Acids / Q000737:chemistry*; D005260:Female; D006041:Goats / Q000502:physiology*; D008892:Milk / Q000737:chemistry*; D010938:Plant Oils / Q000737:chemistry*; D025341:Principal Component Analysis
chemical_list: D005227:Fatty Acids; D010938:Plant Oils
keywords: principal factor analysis