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Title

Associations between major fatty acids in plant oils fed to dairy goats and C18 isomers in milk fat

AuthorsMartínez Marín, A. L.; Gómez-Cortés, Pilar ; Juárez, Manuela ; Fuente, Miguel Ángel de la
KeywordsPrincipal factor analysis
Milk
Plant oils
Fatty acid
Goat
Issue Date2015
PublisherCambridge University Press
CitationJournal of Dairy Research 82(2): 152-160 (2015)
AbstractRelationships 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.
URIhttp://hdl.handle.net/10261/149774
DOI10.1017/S002202991500014X
Identifiersdoi: 10.1017/S002202991500014X
e-issn: 1469-7629
issn: 0022-0299
Appears in Collections:(CIAL) Artículos
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