Effects of Conjugated Linoleic Acid on Growth Performance, Meat Quality, Antioxidant Function and Accumulation in Muscle Tissues of Royal Chickens

LI Yali; ZHANG Meng; CHANG Qiangqiang; YANG Yu; SUN Tianyuan; GUO Yan; LIU Xiaoxia; ZHANG Junzhen

doi:10.3969/j.issn.1006-267x.2022.11.032

2022 , Vol. 34 >Issue 11: 7133 - 7144

DOI: https://doi.org/10.3969/j.issn.1006-267x.2022.11.032

RESEARCH PAPER

Effects of Conjugated Linoleic Acid on Growth Performance, Meat Quality, Antioxidant Function and Accumulation in Muscle Tissues of Royal Chickens

LI Yali ,
ZHANG Meng ,
CHANG Qiangqiang ,
YANG Yu ,
SUN Tianyuan ,
GUO Yan ,
LIU Xiaoxia ,
ZHANG Junzhen

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1. College of Animal Science, Shanxi Agricultural University, Taigu 030801, China;
2. Shanxi Nongkang Xintuo Technology Development Co., Ltd., Taiyuan 030000, China

Received date: 2022-04-21

Online published: 2022-11-14

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Abstract

This experiment was conducted to investigate the effects of dietary conjugated linoleic acid (CLA) on growth performance, serum biochemical indices, muscle CLA content, meat quality and antioxidant function of royal chickens. A total of 360 healthy 55-day-old male royal chickens with similar body weight were randomly divided into 5 groups with 6 replicates per group and 12 chickens per replicate. Chickens in the control group were fed a basal diet+2.0% soybean oil, and those in the experimental groups were fed the control group diets supplemented with 0.5%, 1.0%, 1.5% and 2.0% CLA, respectively, and the same amount of soybean oil was replaced with the corresponding CLA. The pre-trial period lasted for 7 days, and the trial period lasted for 42 days. The results showed as follows:1) compared with the control group, dietary 1.5% and 2.0% CLA significantly decreased the average daily feed intake and feed to gain ratio of royal chickens (P<0.05). 2) Compared with the control group, dietary 2.0% CLA significantly decreased the contents of serum total cholesterol, triglyceride and low-density lipoprotein cholesterol of royal chickens (P<0.05), and dietary 1.0% and 1.5% CLA extremely significantly increased the serum high-density lipoprotein cholesterol content (P<0.01). 3) Compared with the control group, different dietary levels of CLA extremely significantly increased the CLA content in breast muscle and leg muscle of royal chickens (P<0.01), which in the 2.0% CLA supplemental group was the highest, and was extremely significantly higher than that in the other experimental groups (P<0.01). 4) Compared with the control group, dietary 1.5% CLA significantly decreased the brightness (L^*) value and shear force of breast muscle of royal chickens (P<0.05), and dietary 2.0% CLA significantly decreased the L^* value and shear force of leg muscle (P<0.05). 5) Compared with the control group, different dietary levels of CLA extremely significantly decreased the malondialdehyde (MDA) content in serum, leg muscle and breast muscle of royal chickens (P<0.01), dietary 2.0% CLA extremely significantly increased the glutathione peroxidase (GSH-Px) activity in serum (P<0.01), dietary 1.0%, 1.5% and 2.0% CLA extremely significantly increased the GSH-Px activity in breast muscle (P<0.01), and dietary 1.0% CLA extremely significantly increased the GSH-Px activity in leg muscle (P<0.01); the total antioxidant capacity (T-AOC) and activities of superoxide dismutase (SOD) and catalase (CAT) in serum and muscle tissues of royal chickens were increased with dietary CLA supplemental level increasing. 6) Compared with the control group, different dietary levels of CLA extremely significantly increased the mRNA relative expression levels of superoxide dismutase 1 (SOD1) and superoxide dismutase 2 (SOD2) in breast muscle of royal chickens (P<0.01), and dietary 1.0%, 1.5% and 2.0% CLA significantly increased the mRNA relative expression levels of glutathione peroxidase 1 (GPX1) and CAT in breast muscle (P<0.05); dietary 1.5% CLA significantly increased the SOD1 mRNA relative expression level in leg muscle of royal chickens (P<0.05), dietary 1.0%, 1.5% and 2.0% CLA significantly or extremely significantly increased the mRNA relative expression levels of CAT and SOD2 in leg muscle (P<0.05 or P<0.01), and dietary 1.0% and 1.5% CLA significantly increased the GPX1 mRNA relative expression level in leg muscle (P<0.05). In conclusion, dietary CLA in the basal diet can reduce the feed to gain ratio, regulate lipid metabolism, increase the CLA content in breast muscle and leg muscle, improve meat quality, and maintain body health by improving antioxidant capacity of royal chickens. Under the conditions of this experiment, dietary 2.0% CLA is suitable for royal chickens.

Key words： royal chickens; conjugated linoleic acid; growth performance; meat quality; antioxidant

Cite this article

LI Yali , ZHANG Meng , CHANG Qiangqiang , YANG Yu , SUN Tianyuan , GUO Yan , LIU Xiaoxia , ZHANG Junzhen . Effects of Conjugated Linoleic Acid on Growth Performance, Meat Quality, Antioxidant Function and Accumulation in Muscle Tissues of Royal Chickens[J]. Chinese Journal of Animal Nutrition, 2022 , 34(11) : 7133 -7144 . DOI: 10.3969/j.issn.1006-267x.2022.11.032

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