Effects of environmental temperature on growth performance, muscle fiber structure, fatty acid composition, and gene expression in ducks

文献类型： 外文期刊

第一作者： Pan, Ziyi

作者： Pan, Ziyi;Xu, Congcong;Sun, Dongyue;Yang, Xingda;Guo, Rihong;Dai, Zichun;Chen, Fang;Shi, Zhendan;Ying, Shijia;Shi, Zhendan;Ying, Shijia

作者机构：

关键词： Ambient temperature; Duck; Muscle fiber; Fatty acids; Cell cycle

期刊名称：POULTRY SCIENCE （ 影响因子：4.2； 五年影响因子：4.5 ）

ISSN： 0032-5791

年卷期： 2025 年 104 卷 7 期

页码：

收录情况： SCI

摘要： This study aims to elucidate the effects of environmental temperature on growth performance, pectoral muscle fiber structure, fatty acid composition, and gene expression in ducks. A total of 72 ducks at 21-day-old were randomly assigned to controlled environments at temperatures of 20 degrees C (T20) and 29 degrees C (T29) from 21 to 42 days of age. Ducks in the T20 group exhibited significantly higher body weight, body weight gain (BWG), average daily gain (ADG), and average daily feed intake (ADFI) at 42-day-old compared to those in the T29 group (P < 0.05). T20 group showed a marked reduction in muscle fiber diameter and area, with an increase in fiber density compared to those raised at T29 group (P < 0.05). The T20 group also had higher levels of various fatty acids, including saturated (SFAs), monounsaturated (MUFAs), and polyunsaturated (PUFAs) types, while T29 group had lower levels of w-3 and w-6 PUFAs and a higher w-6/w-3 PUFA (P < 0.05). Transcriptomic analysis revealed 544 differentially expressed genes (DEGs) primarily associated with the Cell Cycle, Cell Replication, and PPAR signaling pathways, with key genes cell division cycle 45 (CDC45), chromatin licensing and DNA replication factor 1 (CDT1), and others identified through protein-protein interaction (PPI) network analysis as crucial for temperature regulation of muscle fiber structure and fatty acid composition, particularly within the significantly enriched cell cycle pathway. These findings were validated by qPCR, confirming consistent gene expression trends. The study highlights how ambient temperature affects muscle fiber characteristics and fatty acid composition in ducks, offering insights into potential strategies for optimizing production conditions to enhance meat quality and efficiency.

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