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Título: | Extensive analysis of milk fatty acids in two fat-tailed sheep breeds during lactation |
Autor: | Juárez, Manuela CSIC ORCID ; Fuente, Miguel Ángel de la CSIC ORCID ; Martínez Marín, A. L. | Palabras clave: | Milk quality Ewes Fatty acids |
Fecha de publicación: | 2016 | Editor: | Springer Nature | Citación: | Tropical Animal Health and Production 48(8): 1613-1620 (2016) | Resumen: | The profile of fatty acids (FA) in the milk fat of two Iranian fat-tailed sheep breeds, Sanjabi and Mehraban, was compared during lactation. Eight ewes of each breed, balanced in parity and carrying one foetus, were selected before parturition. Ewes were kept separated in individual pens during the experimental period, under the same management practices and fed the same diet, in order to eliminate any confounding effects on milk FA profile. Milk was sampled at biweekly intervals up to 10 weeks of lactation, starting 2 weeks after parturition. More than 100 FA were determined in milk fat by means of gas chromatography. The milk fat of Sanjabi ewes contained more cis-9 18:1, that of Mehraban ewes was richer in 10:0, 12:0 and 14:0, and no differences were found for 16:0 and 18:0. No breed differences were found for most branched-chain FA. Mehraban ewes showed a higher presence of vaccenic and rumenic acids in their milk fat. The milk fat of Sanjabi ewes had a lower atherogenicity index and n-6/n-3 FA ratio. The contents of several FA showed time-dependent changes, so breed differences were more apparent or disappeared as lactation progressed. The milk fat of Sanjabi ewes showed a better FA profile from the human health point of view. | URI: | http://hdl.handle.net/10261/150219 | DOI: | 10.1007/s11250-016-1135-1 | Identificadores: | doi: 10.1007/s11250-016-1135-1 e-issn: 1573-7438 issn: 0049-4747 |
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