文献类型： 外文期刊

作者： Gou, Z. Y. ¹ ; Cui, X. Y. ¹ ; Li, L. ¹ ; Fan, Q. L. ¹ ; Lin, X. J. ¹ ; Wang, Y. B. ¹ ; Jiang, Z. Y. ¹ ; Jiang, S. Q. ¹ ;

作者机构： 1.Minist Agr & Rural Affairs, Guangdong Acad Agr Sci, Key Lab Anim Nutr & Feed Sci South China,Guangdon, Inst Anim Sci,State Key Lab Livestock & Poultry B, Guangzhou 510640, Peoples R China

关键词： growth performance; n-3 polyunsaturated fatty acid; meat quality; antioxidation; health indicator

期刊名称：ANIMAL （ 影响因子：3.24； 五年影响因子：3.223 ）

ISSN： 1751-7311

年卷期： 2020 年 14 卷 11 期

页码：

收录情况： SCI

摘要： The meat quality of chicken is an important factor affecting the consumer's health. It was hypothesized that n-3 polyunsaturated fatty acid (n-3PUFA) could be effectively deposited in chicken, by incorporating antioxidation of soybean isoflavone (SI), which led to improved quality of chicken meat for good health of human beings. Effects of partial or complete dietary substitution of lard (LA) with linseed oil (LO), with or without SI on growth performance, biochemical indicators, meat quality, fatty acid profiles, lipid-related health indicators and gene expression of breast muscle were examined in chickens. A total of 900 males were fed a corn-soybean meal diet supplemented with 4% LA, 2% LA + 2% LO and 4% LO and the latter two including 30 mg SI/kg (2% LA + 2% LO + SI and 4% LO + SI) from 29 to 66 days of age; each of the five dietary treatments included six replicates of 30 birds. Compared with the 4% LA diet, dietary 4% LO significantly increased the feed efficiency and had no negative effect on objective indices related to meat quality; LO significantly decreased plasma triglycerides and total cholesterol (TCH); abdominal fat percentage was significantly decreased in birds fed the 4% LO and 4% LO + SI diets. Chickens with LO diets resulted in higher contents of alpha-linolenic acid(C18:3n-3), EPA (C20:5n-3) and total n-3 PUFA, together with a lower content of palmitic acid (C16:0), lignoceric acid (C24:0), saturated fatty acids and n-6:n-3 ratio in breast muscle compared to 4% LA diet (P< 0.05); they also significantly decreased atherogenic index, thrombogenic index and increased the hypocholesterolemic to hypercholesterolemic ratio. Adding SI to the LO diets enhanced the contents of EPA and DHA (C22:6n-3), plasma total superoxide dismutase, reduced glutathione (GSH)/oxidized glutathione and muscle GSH content, while decreased plasma total triglyceride and TCH and malondialdehyde content in plasma and breast muscle compared to its absence (P< 0.05). Expression in breast muscle of fatty acid desaturase 1 (FADS1),FADS2, elongase 2 (ELOVL2) andELOVL5genes were significantly higher with the LO diets including SI than with the 4% LA diet. Significant interactions existed between LO level and inclusion of SI on EPA and TCH contents. These findings indicate that diet supplemented with LO combined with SI is an effective alternative when optimizing the nutritional value of chicken meat for human consumers.