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Transcriptome changes provide genetic insights into the effects of rearing systems on chicken welfare and product quality

文献类型： 外文期刊

作者： Xiang, Hai 1 ; Chen, Siyu 2 ; Zhang, Hui 2 ; Zhu, Xu 2 ; Wang, Dan 2 ; Liu, Huagui 6 ; Wang, Jikun 7 ; Yin, Tao 2 ; Liu, Lan 1 ;

作者机构： 1.Foshan Univ, Sch Life Sci & Engn, Foshan 528225, Peoples R China

2.China Agr Univ, Natl Engn Lab Anim Breeding, Beijing 100193, Peoples R China

3.China Agr Univ, Key Lab Anim Genet Breeding & Reprod, Minist Agr, Beijing 100193, Peoples R China

4.China Agr Univ, Coll Anim Sci & Technol, Beijing 100193, Peoples R China

5.Tohoku Univ, Grad Sch Agr Sci, Field Sci Ctr, Lab Land Ecol, Sendai, Miyagi 9896711, Japan

6.Beijing Acad Agr & Forestry Sci, Inst Anim Husb & Vet Med, Beijing 100097, Peoples R China

7.Southwest Univ Nationalities, Minist Educ, Key Lab Qinghai Tibetan Plateau Anim Genet Resour, Chengdu 610041, Peoples R China

8.Southwest Univ Nationalities, Inst Qinghai Tibetan Plateau, Chengdu 610041, Peoples R China

关键词： chicken; product; rearing system; transcriptome; welfare

期刊名称：JOURNAL OF ANIMAL SCIENCE （ 影响因子：3.159； 五年影响因子：2.912 ）

ISSN： 0021-8812

年卷期： 2018 年 96 卷 11 期

页码：

收录情况： SCI

摘要： Farm animals raised under free-range (FR) systems are assumed to have improved welfare and higher-quality products that are better to eat than intensively reared animals. However, the modulations are limited in scientific investigations. In this study, we compared 2 rearing systems (FR and cage) and their effects on chickens, including production performance, product quality, body condition, physiological indicators, and gene expression. By using a match-mismatch design in which each treatment was transferred to the other treatment during the last period of the experiment, we aimed to understand the influence of current and former rearing conditions and the ability of individuals to adapt to the current environment. The results indicated that the FR system led to better chicken welfare (e.g., gait score, feather condition, and physiological indicators, P < 0.05) and contributed to higher product quality (P < 0.05), although it resulted in poorer production performance (P < 0.05) and foot pad condition (P < 0.05) than that of the cage rearing system. Additionally, the FR system triggered a series of inner changes and genetic responses in chickens, such as the upregulation of calcium and GnRH signaling, actin and cytoskeleton regulations, immune functions, and developmental processes, and the downregulation of pathological regulations (q-value < 0.05 for all gene ontology terms and P < 0.05 for all Kyoto Encyclopedia of Genes and Genomes (KEGG) pathways). In conclusion, rearing systems alter chicken gene expression patterns, which provide a genetic basis for the adaptability to rearing environments and ultimately affects chicken welfare and products.

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