Sex Differences in Expression and Collagen Content in Skeletal Muscle of Mature and Juvenile Shamo Chickens

Overview

Journal J Poult Sci

Date 2024 Apr 29

PMID 38681190

Authors

Shotaro Nishimura

Mizuki Ohtani

Grendah Mpundu Kabunda

Sayaka Arai

Haruka Nishimura

Yoshinao Z Hosaka

Affiliations

Soon will be listed here.

Abstract

Collagen content is an important parameter affecting meat consistency. Sex differences in collagen were therefore studied in mature and juvenile Shamo chickens. The pectoral (PT), lateral iliotibial (ITL), medial part of puboischiofemoral (PIF), and lateral part of gastrocnemius (GCL) muscles were weighed, and their expression levels and total collagen content were analyzed. Body and muscle weights were significantly higher in males than in females of all ages. Muscle/body weight ratios were also higher in mature males than in females, but this difference was not observed in juveniles. In mature chickens, expression was higher in the PIF and GCL muscles; this was not the case in juvenile chicken muscles. Sex differences in collagen content were observed only in the ITLs of mature chickens. A positive correlation between muscle weight and intramuscular collagen content was found for PT and GCL, but not for ITL and PIF, muscles. These results suggest that the sex difference in intramuscular collagen content only occurs in specific muscles and that expression is not necessarily related to collagen content in mature chickens. Factors that determine the intramuscular collagen content likely differ by muscle type.

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