Comparative Analysis of Myofiber Characteristics, Shear Force, and Amino Acid Contents in Slow- and Fast-Growing Broilers

Overview

Journal Foods

Specialty Biotechnology

Date 2025 Jan 8

PMID 39766940

Authors

Shuang Gu

Jia Gao

Zehao Li

Shenbo Zhang

Chaoliang Wen

Congjiao Sun

Wei Yan

Zhuocheng Hou

Ning Yang

Junying Li

Affiliations

Soon will be listed here.

Abstract

Skeletal muscle fiber characteristics are pivotal in assessing meat quality. However, there is currently a lack of research precisely quantifying the total number of myofibers (TNM) of skeletal muscles. This study used Arbor Acres (AA) broilers and Wenchang (WC) chickens to determine the TNM of several skeletal muscles and the meat quality of the pectoralis major muscle (PM). The results showed that the TNMs of the PM in AA males and females were 935,363.64 ± 92,529.28 and 873,983.72 ± 84,511.28, respectively, significantly higher than those in WC (511,468.97 ± 73,460.81 and 475,371.93 ± 70,187.83) at 7 days of age ( < 0.01). In terms of gastrocnemius medialis in AA males and females, we recorded values of 207,551.43 ± 31,639.97 and 177,203.23 ± 28,764.01, showing a significant difference compared to the values observed in WC (146,313.03 ± 29,633.21 and 124,238.9 ± 20,136.95) ( < 0.01). Similarly, the levels of gastrocnemius lateralis exhibited a significant difference between AA and WC ( < 0.01). Furthermore, the essential, umami, and sweet amino acids were found to be significantly higher in WC compared to AA ( < 0.01). These findings offer valuable data and insights for accurately quantifying the TNM in livestock and for the development of further genetic breeding strategies for meat quality.

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