Changes in fatty acid composition and distribution of N-3 fatty acids in goat tissues fed different levels of whole linseed.

Kamaleldin Abuelfatah,Md Zuki Abu Bakar Zakaria,Goh Yong Meng,Awis Qurni Sazili

doi:10.1155/2014/934154

Kamaleldin Abuelfatah, Md Zuki Abu Bakar Zakaria + Show 2 more

Open Access

https://doi.org/10.1155/2014/934154

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Abstract

The effects of feeding different levels of whole linseed on fatty acid (FA) composition of muscles and adipose tissues of goat were investigated. Twenty-four Crossed Boer bucks were assigned randomly into three treatment diets: L0, L10, or L20, containing 0%, 10%, or 20% whole linseed, respectively. The goats were slaughtered after 110 days of feeding. Samples from the longissimus dorsi, supraspinatus, semitendinosus, and subcutaneous fat (SF) and perirenal fat (PF) were taken for FA analyses. In muscles, the average increments in α-linolenic (ALA) and total n-3 PUFA were 6.48 and 3.4, and 11.48 and 4.78 for L10 and L20, respectively. In the adipose tissues, the increments in ALA and total n-3 PUFA were 3.07- and 6.92-fold and 3.00- and 7.54-fold in SF and PF for L10 and L20, respectively. The n-6 : n-3 ratio of the muscles was decreased from up to 8.86 in L0 to 2 or less in L10 and L20. The PUFA : SFA ratio was increased in all the tissues of L20 compared to L0. It is concluded that both inclusion levels (10% and 20%) of whole linseed in goat diets resulted in producing meat highly enriched with n-3 PUFA with desirable n-6 : n-3 ratio.

Highlights

The increased intake of n-3 polyunsaturated fatty acids (PUFA), eicosapentaenoic acid (EPA) and docosahexaenoic acid has been associated with significant physiological and health benefits in human populations
The potential benefits of n-3 PUFA have stimulated the research in different fields in order to increase these beneficial fatty acids (FAs) in the human diet towards recommended levels
The inclusion of linseed in the diet resulted in an increase in the proportion of ALA and total n-3 PUFA in muscles and adipose tissues of goats as the inclusion level of linseed increased

Summary

Introduction

The increased intake of n-3 polyunsaturated fatty acids (PUFA), eicosapentaenoic acid (EPA) and docosahexaenoic acid has been associated with significant physiological and health benefits in human populations. The potential benefits of n-3 PUFA have stimulated the research in different fields in order to increase these beneficial fatty acids (FAs) in the human diet towards recommended levels. Comparing to monogastrics, increasing the PUFA in the ruminant meat is more challenging, since most of the PUFA in the animal diet are hydrogenated by the rumen microorganisms [10]. The inclusion of sources of α-linolenic acid (ALA) in the diets of ruminants has been shown to increase the concentration of n-3 PUFA in their meat.

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