Influence of divergence in residual feed intake on growth performance, carcass traits, meat quality, muscle fiber morphology, and blood chemistry in indigenous chickens

作者：Wenjing Chen, Weiqi Wang, Xin Wang, X. Liu, Liang Chang, Haoming Chang, Yunxia He, Zhaoyu Geng, Sihua Jin · 发表于：Poultry Science · 年份：2025 · DOI：10.1016/j.psj.2025.105712 · 被引用次数：5 · 研究领域：Animal Nutrition and Physiology、Livestock and Poultry Management、Rabbits: Nutrition, Reproduction, Health

ABSTRACT Feed efficiency ( FE ) is an important factor restricting development of the poultry industries. Residual feed intake ( RFI ) serves as an indicator for measuring FE in breeding initiatives. This study aimed to explore the influence of divergence in RFI on growth performance, carcass traits, meat quality, muscle fiber morphology, and blood chemistry in indigenous chickens. A total of 500 one-day-old male chickens of similar body weight had RFI assessed at 70–120 d. Twenty high RFI ( HRFI ) and 20 low RFI ( LRFI ) chickens were evaluated for carcass traits, meat quality, muscle fiber morphology, and blood biochemical parameters. The results showed that although RFI was significantly positively correlated with average daily gain, average daily feed intake (ADFI), and feed conversion ratio ( FCR ) ( P <0.01), no significant correlation existed between the initial, final, and metabolic body weight. Concerning slaughter performance, abdominal fat yield ( AFY ) and weight ( AFW ) were lower in the LRFI group ( P <0.01). Regarding meat quality, the pH 24h of the thigh muscle and the shear force of the breast muscle were lower in LRFI group ( P <0.01). Muscle fibers did not differ between the HRFI and LRFI groups. Regarding blood biochemical parameters, non-esterified fatty acid, creatinine ( CREA ), low-density lipoprotein cholesterol ( LDL-C ), and cholesterol ( CHOL ) levels were higher in the HRFI group ( P < 0.05). Correlation analysis suggested that RFI was positively ...